Cat's Library Downloads & RevenueCat's Library - Book Tracker · App Store & Google Play
Cat's Library - Book Tracker gets 500+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
Cat's Library - Book Tracker by Lo-Fi Labs Inc. is on App Store and Google Play. Active Users (MAU & DAU), Downloads, rankings, keywords, revenue, and rating totals.
Cat's Library - Book Tracker update history & changes
Last change · 55 events since 17 Sep 2025Full timeline ↓📦AndroidUpdated to version 2.1.16📦iOSUpdated to version 2.1.15✏️AndroidNew icon📦AndroidUpdated to version 2.1.15✏️iOSDescription updated✏️iOSNew iPad screenshots📦iOSUpdated to version 2.1.14✏️AndroidDescription updated📈AndroidEntered the top 100📈AndroidCharting in a new country📈iOSEntered the top 100📈iOSCharting in a new country⭐iOSPassed 1K ratings🆕iOSIts developer released another app: Cat's Study: Focus Timer🆕AndroidFirst spotted by AppInsider🆕iOSFirst spotted by AppInsider🆕AndroidReleased on Google Play
Full timeline · 55 events
- 📦Cat's Library - Book Tracker updated to version 2.1.16AndroidNew Features & Improvements
• You can now pick several books and add them to a Shelf folder all at once.
• New Russian Blue and Cow cat coats are now in the Cat tab of the Shop.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.15iOS機能の追加および改善
• 購読中は、ホームの部屋の絵が画面のいちばん上まで続くようになりました。ホームの設定でオン・オフを切り替えられます。
• ショップでテーマを選ぶとき、部屋全体の様子をプレビューできるようになりました。
不具合修正
• ご利用中に発生していた一部の不具合を修正しました。
サービスの最適化
• より快適にご利用いただけるよう、UIデザインを改善しアプリの安定性を強化しました。 - ✏️Cat's Library - Book Tracker: new iconAndroid
→
· US
- 📦Cat's Library - Book Tracker updated to version 2.1.15AndroidNew Features & Improvements
• With a subscription, your room on Home now stretches all the way to the top of the screen. You can turn this on or off in Home Settings.
• When choosing a Theme in the Shop, you can now preview the whole room.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - ✏️Cat's Library - Book Tracker: description updatediOS· KR
- ✏️Cat's Library - Book Tracker: new iPad screenshotsiOS· KR
- ✏️Cat's Library - Book Tracker: new screenshotsiOS10 screenshots (was 8) · KR
- ✏️Cat's Library - Book Tracker: new iconiOS
→ 
· KR, JP - ✏️Cat's Library - Book Tracker: description updatediOS· JP
- ✏️Cat's Library - Book Tracker: new iPad screenshotsiOS· JP
- ✏️Cat's Library - Book Tracker: new screenshotsiOS10 screenshots (was 8) · JP
- ✏️Cat's Library - Book Tracker: app got biggeriOS227 MB → 254 MB (+12%)
- 📦Cat's Library - Book Tracker updated to version 2.1.14iOSNew Features & Improvements
• In Stats › Recap, view the books you finished as a Book stack or as Covers, and save the image just as you see it.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - ✏️Cat's Library - Book Tracker: description updatedAndroid· US
- ✏️Cat's Library - Book Tracker: short description updatedAndroid· US
- 📦Cat's Library - Book Tracker updated to version 2.1.14AndroidNew Features & Improvements
• In Stats › Recap, view the books you finished as a Book stack or as Covers, and save the image just as you see it.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📈Cat's Library - Book Tracker entered the top 100AndroidTop Free · Books & Reference · NL
- 📈Cat's Library - Book Tracker charting in a new countryAndroidNetherlands
- 📦Cat's Library - Book Tracker updated to version 2.1.13iOS機能の追加および改善
• 本の情報に再読記録が加わりました。もう一度読むたびに、読んだ期間と評価・レビューを回ごとに残せます。
• ショップのアクセサリーにフェイスが加わりました。フェイスアイテムをメガネと一緒に着けられます。
不具合修正
• ご利用中に発生していた一部の不具合を修正しました。
サービスの最適化
• より快適にご利用いただけるよう、UIデザインを改善しアプリの安定性を強化しました。 - 📦Cat's Library - Book Tracker updated to version 2.1.13AndroidNew Features & Improvements
• Book Info now has a Reading history. Each time you re-read a book, the dates, rating and review for that read are kept separately.
• The Shop's Accessories now have a Face section. Wear Face items together with Glasses.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.12iOSNew Features & Improvements
• Book Info now has a Reading history. Each time you re-read a book, the dates, rating and review for that read are kept separately.
• The Shop's Accessories now have a Face section. Wear Face items together with Glasses.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.11iOS新增功能及改进
• 收集的句子变成了读书手账。除了书中的句子，还能记下阅读时浮现的想法，并在书籍页面看到其他读者的想法。
• 现在可以更换猫咪的毛色了。在商店的猫咪标签中，从橘猫、奶牛猫、狸花猫、三花猫、暹罗猫里挑选喜欢的毛色吧。
• 风格移到了设置中，所有颜色和我的风格现在人人都能免费使用。
• 阅读时，装扮好的猫咪也会出现在灵动岛中。
• 在书籍页面顶部，可以直接看到自己写的书评、句子和想法。
错误修复
• 修复了使用过程中可能出现的一些问题。
服务优化
• 优化了界面设计并增强了应用稳定性，使用更顺畅。… more - 📈Cat's Library - Book Tracker entered the top 100iOSTop Grossing · Books · CN
- 📈Cat's Library - Book Tracker charting in a new countryiOSChina
- 📦Cat's Library - Book Tracker updated to version 2.1.11AndroidNew Features & Improvements
• Quote Collection is now Reading Notes: save your own thoughts too, and see other readers' thoughts on book pages.
• Change your cat's coat in the Shop's Cat tab.
• Styles moved to Settings, and every color and My Styles are now free.
• See your reviews and notes at the top of book pages.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.10iOSNew Features & Improvements
• New Offline mode: keep using your Shelf, reading logs and quotes without internet. Everything uploads automatically once you're back online.
• The Quote Collection screen has a new look. View quotes as a list or cards, group them by book, or show only quotes with notes.
• In the Account tab, see your reading story through your cat's eyes, and save your favorite scenes as photos.
• New in the Shop: the subscription-only Cat-Ear Rain Hat.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.10AndroidNew Features & Improvements
• New Offline mode: Shelf, reading logs and quotes work without internet and upload once you reconnect.
• Quote Collection has a new look with list and card views.
• See your reading story through your cat's eyes in the Account tab.
• Two new home screen widgets with your cat, reading time and current book.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.8iOSNew Features & Improvements
• The reading card on the Lock Screen has a new look. Your dressed-up cat peeks out, and dozes off when you pause.
• Choose between the Halloween and Classic app icons in Settings › General › App Icon.
• Pick folders for a book right as you add it.
• When filtering a book's Log by period, pick one date to see that day, or two to see the range between them.
• We redrew 14 earlier outfits, hats and glasses. Your cat now wears them while resting or sleeping, too.
• Limited-time Shop items now show their remaining sale time.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.8AndroidNew Features & Improvements
• Pick folders for a book right as you add it.
• When filtering a book's Log by period, pick one date to see that day, or two to see the range between them.
• We redrew 14 earlier outfits, hats and glasses. Your cat now wears them while resting or sleeping, too.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - ✏️Cat's Library - Book Tracker: new iconAndroid
→
- ✏️Cat's Library - Book Tracker: new iconiOS
→ 
· KR, JP, ID - 📦Cat's Library - Book Tracker updated to version 2.1.7iOSNew Features & Improvements
• On Home, the reading cat's book now shows the cover of the book you're reading. You can turn it off in Settings › Home.
• For Halloween, the app icon is now a cat in a witch hat.
• In Dark Mode, the Home Screen widget background is now black.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.7AndroidNew Features & Improvements
• On Home, the reading cat's book now shows the cover of the book you're reading. You can turn it off in Settings › Home.
• For Halloween, the app icon is now a cat in a witch hat.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📈Cat's Library - Book Tracker entered the top 100 in 2 chartsiOSTop Grossing · Books · ID · Top Grossing · Books · JP
- ✏️Cat's Library - Book Tracker: app got biggeriOS206 MB → 227 MB (+10%)
- 📦Cat's Library - Book Tracker updated to version 2.1.6iOS機能の追加および改善
• ホームの本のカードを左にスワイプすると、ショートカットが表示されます。よく使う機能を選んで並べられ、デイリーコインもその場で受け取れます。
• ホーム画面のウィジェットとDynamic Islandから読書の一時停止・再開ができ、読書終了・文章収集の画面にもすぐに移動できます。
不具合修正
• ご利用中に発生していた一部の不具合を修正しました。
サービスの最適化
• より快適にご利用いただけるよう、UIデザインを改善しアプリの安定性を強化しました。… more - 📦Cat's Library - Book Tracker updated to version 2.1.6AndroidNew Features & Improvements
• Swipe the book card on Home to the left to open shortcuts. Pick the features you use most and claim Daily Coins right there.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.5iOSBug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience. - 📦Cat's Library - Book Tracker: now updating weeklyiOS4 updates in 30 days, after a quiet two months
- 📦Cat's Library - Book Tracker: now updating weeklyAndroid4 updates in 30 days, after a quiet two months
- 📦Cat's Library - Book Tracker updated to version 2.1.5AndroidBug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience. - 📦Cat's Library - Book Tracker updated to version 2.1.4iOSNew Features & Improvements
• New in the Shop: the Autumn Forest Library theme, Forest Coffee Break, and autumn hats and outfits.
• Search books in the Library to see ratings & reviews. Tap an author to find more of their books.
• In Stats, choose the first day of the week, the calendar layout, and which sections to show and in what order.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 🆕Cat's Library - Book Tracker: its developer released another app: Cat's Study: Focus TimeriOS
- 📦Cat's Library - Book Tracker updated to version 2.1.4AndroidNew Features & Improvements
• New in the Shop: the Autumn Forest Library theme, Forest Coffee Break, and autumn hats and outfits.
• Search books in the Library to see ratings & reviews. Tap an author to find more of their books.
• In Stats, choose the first day of the week, the calendar layout, and which sections to show and in what order.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📈Cat's Library - Book Tracker entered the top 100iOSTop Free · Books · JP
- 📈Cat's Library - Book Tracker charting in a new countryiOSIndonesia
- 📦Cat's Library - Book Tracker updated to version 2.1.3iOSNew Features & Improvements
• You can now send nudges to friends. Add a short message and a book to go with it.
• End a reading session of 5+ minutes and your Reading Streak reward is added right away. If you didn't get it, you can still claim it the same day from Reading Streak in the Coin Shop.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 📦Cat's Library - Book Tracker updated to version 2.1.3AndroidNew Features & Improvements
• You can now send nudges to friends. Add a short message and a book to go with it.
• End a reading session of 5+ minutes and your Reading Streak reward is added right away. If you didn't get it, you can still claim it the same day from Reading Streak in the Coin Shop.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 🆕Cat's Library - Book Tracker first spotted by AppInsiderAndroidJapan
- 🆕Cat's Library - Book Tracker first spotted by AppInsideriOS#69 in Top Grossing · Books · South Korea
- 📦Cat's Library - Book Tracker version 2.1.2iOSNo release notes
- 📦Cat's Library - Book Tracker version 2.1.2AndroidNew Features & Improvements
• The Lantern Hat and the Otherworldly Gentleman's Suit are now in the Shop.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.… more - 🆕Cat's Library - Book Tracker released on Google PlayAndroid
- 🆕Cat's Library - Book Tracker released on the App StoreiOS
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.9 ★
2.3k ratings, both stores
Measured
Best rank now
#37
App Store · 
Books Grossing
Books GrossingMeasured
New ratings a week
158
steady vs the 2 weeks before (App Store)
Measured
App Store
App details
App ID
6752113848
Publisher
Lo-Fi Labs Inc.
Publisher country
South Korea
On the store since
Sep 2025
1 year on the store
Minimum OS
iOS 16.6+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
9
EN FR DE ID JA KO ZH ES ZH
Size
262 MB
Also listed in
Books, Lifestyle
Google Play
App details
App ID
com.tld.takeabook
Publisher
(주)로파이랩스
Publisher country
South Korea
Content rating
Everyone
Cat's Library - Book Tracker downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| App Store | 100+ | 50k+ |
| Google Play | 100+ | 50k+ Measured |
| Total | 500+ Confidence | 100k+ Confidence |
How this is calculated
App Store: chart positions and rating growth per country, anchored on its own Android downloads; lifetime from ratings worldwide × installs per rating. Google Play: the daily change in its exact install count. The total adds every store.
Where Cat's Library - Book Tracker's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend before Apple and Google take their fee.
| Store | Per day | Per month | Share |
|---|---|---|---|
| App Store | |||
| Google Play | |||
| Total | Confidence | 100% |
Business model: Ad-led
How Cat's Library - Book Tracker makes money: subscriptions, one-off purchases and ads.
SubscriptionsIn-app purchasesAds · 4 ad networks
Subscriptions
/mo
of revenue
Ads
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | Pro Book Butler Monthly Sub subscription | |
| 2 | Pro Book Butler Annual Subscription subscription | |
| 3 | Pro Book Butler Lifetime Subs subscription | |
| 4 | Coin Pack - 1000 | |
| 5 | Pro Book Butler Annual Subscription subscription | |
| 6 | Coin Pack - 500 | |
| 7 | Coin Pack - 100 |
Where it ranks now
Both stores, across every country we track.
| Store | Best rank | Charting in | US Top Free | US Top Grossing |
|---|---|---|---|---|
| App Store | #37 Books Grossing | 2 of 30 countries | – | – |
| Google Play | #71 Books & Reference Free | 2 of 23 countries | – | – |
Full chart lists: App Store · Google Play.
Review momentum
ⓘ How we measure thisApp Store
New ratings a week
92
steady vs the 2 weeks before
Recent ratings
4.7★
vs 4.7★ lifetime
Review momentum
83/100
faster than 96% of Books apps
New ratings by country (2)
| Country | New ratings a week | Share | Last 2 weeks vs the 2 before |
|---|---|---|---|
 Japan | 72 | 78% | ▼ -5% |
| South Korea | 20 | 22% | ▲ +19% |
App Store ratings in the countries we track, 4-week average.
Google Play
New ratings a week
66
▼ -23% vs the 2 weeks before
Written reviews a week
6
Google Play
Recent ratings
5.0★
vs 4.8★ lifetime
Review momentum
62/100
faster than 66% of Books and reference apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 4.8 ★ | 726 |
| Google Play | 5.0 ★ | 1.6k 130 written reviews |
| Both stores | 4.9 ★ weighted by ratings | 2.3k |
About Cat's Library - Book Tracker
For all book lovers and cat lovers out there!
With "Cat's Library" reading is no longer a solitary activity. Become a book butler, read books with adorable cats, record your progress, and get encouragement. If you want to turn reading time into a habit or create your own library, become a book butler right now.
Reading Experience with Cats
Read books with cute cats while using the reading timer.
Check your reading time in real-time, and when you finish reading for a certain period, the cat will also appear to rest.
Experience both motivation and healing through reading with cats, not 'reading alone.'
Cat Bookstore
The cat bookstore is equipped with cute props and soothing music.
If it's too bright, turn off the lights and turn on the desk lamp.
Collected quotes accumulate on the quote board.
Discover the growing library feature where your bookshelf fills up the more you read.
My Library
Organize your library by categorizing books into 'To Read', 'Currently Reading', and 'Read'.
Book registration is very convenient with general search, manual addition, and even barcode recognition support.
Don't know what to read? The cat will recommend books for you.
Reading Records
You can leave notes about your feelings or emotions from each reading session.
Review collected quotes and reading records by book, reflecting on the traces of each book.
Quote Collection
When you find a quote you like while reading, collect it right away.
Camera OCR function quickly recognizes text, allowing you to save it without typing.
Calendar
Check your reading activities with the monthly calendar.
Library
- Add friends and peek at each other's bookshelves — even which book they're reading right now, and for how long.
- See which books the book butlers added most this week, and the most-picked all-time favorites.
- You decide what to share, item by item: shelf, log, quotes, reviews.
Themes & Outfits
- Spend the coins you earn by reading on cat outfits and room themes.
- Cherry blossom, café, Positano, a cozy study… read in the room that fits your mood today.
Recap
- Books, pages, hours, quotes — look back at everything you've read, in numbers.
- Watch your finished books stack up, by week, month, year, or all time.
More features coming soon!
Beyond a simple reading tracker app, become a book butler and experience having your own library and an emotional companion with cats.
Start The Cat's Library right now!
Contact & News
- Email: [email protected]
- Instagram & Threads: @take_a.book.en
- X: @Cats_Library_
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
With "Cat's Library" reading is no longer a solitary activity. Become a book butler, read books with adorable cats, record your progress, and get encouragement. If you want to turn reading time into a habit or create your own library, become a book butler right now.
Reading Experience with Cats
Read books with cute cats while using the reading timer.
Check your reading time in real-time, and when you finish reading for a certain period, the cat will also appear to rest.
Experience both motivation and healing through reading with cats, not 'reading alone.'
Cat Bookstore
The cat bookstore is equipped with cute props and soothing music.
If it's too bright, turn off the lights and turn on the desk lamp.
Collected quotes accumulate on the quote board.
Discover the growing library feature where your bookshelf fills up the more you read.
My Library
Organize your library by categorizing books into 'To Read', 'Currently Reading', and 'Read'.
Book registration is very convenient with general search, manual addition, and even barcode recognition support.
Don't know what to read? The cat will recommend books for you.
Reading Records
You can leave notes about your feelings or emotions from each reading session.
Review collected quotes and reading records by book, reflecting on the traces of each book.
Quote Collection
When you find a quote you like while reading, collect it right away.
Camera OCR function quickly recognizes text, allowing you to save it without typing.
Calendar
Check your reading activities with the monthly calendar.
Library
- Add friends and peek at each other's bookshelves — even which book they're reading right now, and for how long.
- See which books the book butlers added most this week, and the most-picked all-time favorites.
- You decide what to share, item by item: shelf, log, quotes, reviews.
Themes & Outfits
- Spend the coins you earn by reading on cat outfits and room themes.
- Cherry blossom, café, Positano, a cozy study… read in the room that fits your mood today.
Recap
- Books, pages, hours, quotes — look back at everything you've read, in numbers.
- Watch your finished books stack up, by week, month, year, or all time.
More features coming soon!
Beyond a simple reading tracker app, become a book butler and experience having your own library and an emotional companion with cats.
Start The Cat's Library right now!
Contact & News
- Email: [email protected]
- Instagram & Threads: @take_a.book.en
- X: @Cats_Library_
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Cat's Library - Book Tracker App Store
고양이 책집사 - 독서 기록, 문장 수집 앱
Cat's Library - Book Tracker gets 500+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
Cat's Library - Book Tracker is #41 in Books Free in Japan and charting in 2 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperLo-Fi Labs Inc.
CategoryBooks
PriceFree
Released
Rating★ 4.8 (726)
Version2.1.15
Age rating4+
First seen by us 24 Sep 2026
24 Sep 2026Installs (est.)50k+ worldwide
Rating
4.8 ★
726 ratings
Measured
Best rank now
#41
Books FreeMeasured
New ratings a week
92
steady vs the 2 weeks before
Measured
Cat's Library - Book Tracker on the App Store
App details
App ID
6752113848
Publisher
Lo-Fi Labs Inc.
Publisher country
South Korea
On the store since
Sep 2025
1 year on the store
Minimum OS
iOS 16.6+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
9
EN FR DE ID JA KO ZH ES ZH
Size
262 MB
Also listed in
Books, Lifestyle
Cat's Library - Book Tracker downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Cat's Library - Book Tracker's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Cat's Library - Book Tracker before Apple and Google take their fee.
How this is calculated
Not in an overall Top Grossing chart, only in category charts: each category position is converted to the overall position it corresponds to, then priced on the same rank-to-revenue curve, inside the part of each market the charted apps leave over.
Business model: Ad-led
How Cat's Library - Book Tracker makes money: subscriptions, one-off purchases and ads.
SubscriptionsIn-app purchasesAds · 4 ad networks
Subscriptions
/mo
of revenue
Ads
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | Pro Book Butler Monthly Sub subscription | |
| 2 | Pro Book Butler Annual Subscription subscription | |
| 3 | Pro Book Butler Lifetime Subs subscription | |
| 4 | Coin Pack - 1000 | |
| 5 | Pro Book Butler Annual Subscription subscription | |
| 6 | Coin Pack - 500 | |
| 7 | Coin Pack - 100 |
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | BooksFree | #41 |
| South Korea | BooksGrossing | #37 |
| Japan | BooksGrossing | #83 |
| South Korea | BooksFree | #40 |
Apps near Cat's Library - Book Tracker on the chart
Books Free, around #41.
Ratings
App Store, worldwide.
Rating
4.8 ★
726 ratings
Measured
Ratings
726
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
92
steady vs the 2 weeks before
Recent ratings
4.7★
vs 4.7★ lifetime
Review momentum
83/100
faster than 96% of Books apps
New ratings by country (2)
| Country | New ratings a week | Share | Last 2 weeks vs the 2 before |
|---|---|---|---|
| Japan | 72 | 78% | ▼ -5% |
| South Korea | 20 | 22% | ▲ +19% |
App Store ratings in the countries we track, 4-week average.
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Cat's Library - Book Tracker
For all book lovers and cat lovers out there!
With "Cat's Library" reading is no longer a solitary activity. Become a book butler, read books with adorable cats, record your progress, and get encouragement. If you want to turn reading time into a habit or create your own library, become a book butler right now.
Reading Experience with Cats
Read books with cute cats while using the reading timer.
Check your reading time in real-time, and when you finish reading for a certain period, the cat will also appear to rest.
Experience both motivation and healing through reading with cats, not 'reading alone.'
Cat Bookstore
The cat bookstore is equipped with cute props and soothing music.
If it's too bright, turn off the lights and turn on the desk lamp.
Collected quotes accumulate on the quote board.
Discover the growing library feature where your bookshelf fills up the more you read.
My Library
Organize your library by categorizing books into 'To Read', 'Currently Reading', and 'Read'.
Book registration is very convenient with general search, manual addition, and even barcode recognition support.
Don't know what to read? The cat will recommend books for you.
Reading Records
You can leave notes about your feelings or emotions from each reading session.
Review collected quotes and reading records by book, reflecting on the traces of each book.
Quote Collection
When you find a quote you like while reading, collect it right away.
Camera OCR function quickly recognizes text, allowing you to save it without typing.
Calendar
Check your reading activities with the monthly calendar.
Library
- Add friends and peek at each other's bookshelves — even which book they're reading right now, and for how long.
- See which books the book butlers added most this week, and the most-picked all-time favorites.
- You decide what to share, item by item: shelf, log, quotes, reviews.
Themes & Outfits
- Spend the coins you earn by reading on cat outfits and room themes.
- Cherry blossom, café, Positano, a cozy study… read in the room that fits your mood today.
Recap
- Books, pages, hours, quotes — look back at everything you've read, in numbers.
- Watch your finished books stack up, by week, month, year, or all time.
More features coming soon!
Beyond a simple reading tracker app, become a book butler and experience having your own library and an emotional companion with cats.
Start The Cat's Library right now!
Contact & News
- Email: [email protected]
- Instagram & Threads: @take_a.book.en
- X: @Cats_Library_
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
With "Cat's Library" reading is no longer a solitary activity. Become a book butler, read books with adorable cats, record your progress, and get encouragement. If you want to turn reading time into a habit or create your own library, become a book butler right now.
Reading Experience with Cats
Read books with cute cats while using the reading timer.
Check your reading time in real-time, and when you finish reading for a certain period, the cat will also appear to rest.
Experience both motivation and healing through reading with cats, not 'reading alone.'
Cat Bookstore
The cat bookstore is equipped with cute props and soothing music.
If it's too bright, turn off the lights and turn on the desk lamp.
Collected quotes accumulate on the quote board.
Discover the growing library feature where your bookshelf fills up the more you read.
My Library
Organize your library by categorizing books into 'To Read', 'Currently Reading', and 'Read'.
Book registration is very convenient with general search, manual addition, and even barcode recognition support.
Don't know what to read? The cat will recommend books for you.
Reading Records
You can leave notes about your feelings or emotions from each reading session.
Review collected quotes and reading records by book, reflecting on the traces of each book.
Quote Collection
When you find a quote you like while reading, collect it right away.
Camera OCR function quickly recognizes text, allowing you to save it without typing.
Calendar
Check your reading activities with the monthly calendar.
Library
- Add friends and peek at each other's bookshelves — even which book they're reading right now, and for how long.
- See which books the book butlers added most this week, and the most-picked all-time favorites.
- You decide what to share, item by item: shelf, log, quotes, reviews.
Themes & Outfits
- Spend the coins you earn by reading on cat outfits and room themes.
- Cherry blossom, café, Positano, a cozy study… read in the room that fits your mood today.
Recap
- Books, pages, hours, quotes — look back at everything you've read, in numbers.
- Watch your finished books stack up, by week, month, year, or all time.
More features coming soon!
Beyond a simple reading tracker app, become a book butler and experience having your own library and an emotional companion with cats.
Start The Cat's Library right now!
Contact & News
- Email: [email protected]
- Instagram & Threads: @take_a.book.en
- X: @Cats_Library_
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Latest updates
2.1.15
機能の追加および改善
• 購読中は、ホームの部屋の絵が画面のいちばん上まで続くようになりました。ホームの設定でオン・オフを切り替えられます。
• ショップでテーマを選ぶとき、部屋全体の様子をプレビューできるようになりました。
不具合修正
• ご利用中に発生していた一部の不具合を修正しました。
サービスの最適化
• より快適にご利用いただけるよう、UIデザインを改善しアプリの安定性を強化しました。
2.1.14
New Features & Improvements
• In Stats › Recap, view the books you finished as a Book stack or as Covers, and save the image just as you see it.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.
2.1.13
機能の追加および改善
• 本の情報に再読記録が加わりました。もう一度読むたびに、読んだ期間と評価・レビューを回ごとに残せます。
• ショップのアクセサリーにフェイスが加わりました。フェイスアイテムをメガネと一緒に着けられます。
不具合修正
• ご利用中に発生していた一部の不具合を修正しました。
サービスの最適化
• より快適にご利用いただけるよう、UIデザインを改善しアプリの安定性を強化しました。
Store changes
What Cat's Library - Book Tracker changed on its store page: name, icon, screenshots, price, size, languages, requirements.
Description updated
New iPad screenshots
New screenshots
10 screenshots (was 8)
More from Lo-Fi Labs Inc.
Cat's Library - Book Tracker Android
Cat's Library - Book Tracker gets 500+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
Cat's Library - Book Tracker is #111 in Books & Reference Free on Google Play in Japan and charting in 2 of 23 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperLo-Fi Labs Inc.
CategoryBooks & Reference
PriceFree
Released
Installs50k+
Rating★ 5.0 (1.6k)
Updated
Content ratingEveryone
Rating
5.0 ★
1.6k ratings
Measured
Best rank now
#111
Books & Reference FreeMeasured
New ratings a week
66
▼ -23% vs the 2 weeks before
Measured
Cat's Library - Book Tracker on Google Play
App details
App ID
com.tld.takeabook
Publisher
(주)로파이랩스
Publisher country
South Korea
Content rating
Everyone
Cat's Library - Book Tracker downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Where Cat's Library - Book Tracker's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Cat's Library - Book Tracker before Apple and Google take their fee.
How this is calculated
Not in an overall Top Grossing chart, only in category charts: each category position is converted to the overall position it corresponds to, then priced on the same rank-to-revenue curve, inside the part of each market the charted apps leave over.
Business model: Ad-led
How Cat's Library - Book Tracker makes money: subscriptions, one-off purchases and ads.
SubscriptionsIn-app purchasesAds · 4 ad networks
Subscriptions
/mo
of revenue
Ads
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | Pro Book Butler Monthly Sub subscription | |
| 2 | Pro Book Butler Annual Subscription subscription | |
| 3 | Pro Book Butler Lifetime Subs subscription | |
| 4 | Coin Pack - 1000 | |
| 5 | Pro Book Butler Annual Subscription subscription | |
| 6 | Coin Pack - 500 | |
| 7 | Coin Pack - 100 |
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | Books & ReferenceFree | #111 |
| South Korea | Books & ReferenceFree | #71 |
Apps near Cat's Library - Book Tracker on the chart
Books & Reference Free, around #111.
Ratings
Google Play, worldwide.
Rating
5.0 ★
1.6k ratings
Measured
Ratings
1.6k
Measured
Written reviews
130
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
66
▼ -23% vs the 2 weeks before
Written reviews a week
6
Google Play
Recent ratings
5.0★
vs 4.8★ lifetime
Review momentum
62/100
faster than 66% of Books and reference apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Cat's Library - Book Tracker
What you can do with Cat's Library
• Reading timer — read alongside a cozy cat while your reading time is tracked
• Book tracker — keep To Read, Currently Reading and Finished in one place
• Quote collection — snap a page with camera OCR and save quotes, no typing
• Reading journal — notes, a reading calendar and reading stats at a glance
• Cat dress-up — outfits and themes for a cozy reading room of your own
• Book community — explore other readers' shelves and popular books
🐾 Read with Cats
• Start the reading timer and your cat settles in to read beside you.
• Your reading time is tracked in real time, and after a good long read your cat curls up to rest.
• Reading with a companion instead of alone brings both motivation and comfort.
• Days you read with the timer build up your reading streak.
📚 Book Tracker & TBR List
• Organize your library into To Read, Currently Reading and Finished.
• Add books in seconds with search, barcode scan or manual entry.
• Folders and automatic categories keep even a big library tidy.
• Can't decide what to read next? Let your cat pick one from your TBR list.
💬 Quote Collection
• Found a line you love? Save it right away.
• Camera OCR captures text straight from the page — no typing required.
• Your quotes are pinned to the quote board in your cat bookstore.
✏️ Reading Journal, Calendar & Stats
• Write notes after each reading session in your personal reading journal.
• Revisit your quotes and reflections book by book.
• See your daily reading log at a glance on the monthly reading calendar.
• Look back on books, pages, hours and quotes with reading stats by week, month, year or all time.
🎀 Dress Up Your Cat & Cozy Bookstore
• Dress your cat in adorable outfits and costumes.
• Change the mood of your reading room with themes and seasonal themes.
• Relax in a warm cat bookstore with charming props and soothing music. Too bright? Turn off the main light and switch on the desk lamp.
• Your bookshelf fills up as you finish more books.
👀 Explore Libraries & Popular Books
• Visit other readers' libraries and discover new books through their reading records and quotes.
• Browse the rankings of popular books to find your next read.
✨ More Features
• Import and export your library with CSV or Excel (XLSX)
• Dark mode and accent color themes
• Home screen widget
🌸 Perfect For
• Anyone who wants to build a reading habit
• Readers looking for a cozy reading tracker or book journal
• Quote collectors and journaling lovers
• Book lovers who adore cats
Your cat is already waiting for you in Cat's Library. 🐾
📮 Contact & News
• Email: [email protected]
• Instagram & Threads: @take_a.book.en
• X: @Cats_Library_
• Reading timer — read alongside a cozy cat while your reading time is tracked
• Book tracker — keep To Read, Currently Reading and Finished in one place
• Quote collection — snap a page with camera OCR and save quotes, no typing
• Reading journal — notes, a reading calendar and reading stats at a glance
• Cat dress-up — outfits and themes for a cozy reading room of your own
• Book community — explore other readers' shelves and popular books
🐾 Read with Cats
• Start the reading timer and your cat settles in to read beside you.
• Your reading time is tracked in real time, and after a good long read your cat curls up to rest.
• Reading with a companion instead of alone brings both motivation and comfort.
• Days you read with the timer build up your reading streak.
📚 Book Tracker & TBR List
• Organize your library into To Read, Currently Reading and Finished.
• Add books in seconds with search, barcode scan or manual entry.
• Folders and automatic categories keep even a big library tidy.
• Can't decide what to read next? Let your cat pick one from your TBR list.
💬 Quote Collection
• Found a line you love? Save it right away.
• Camera OCR captures text straight from the page — no typing required.
• Your quotes are pinned to the quote board in your cat bookstore.
✏️ Reading Journal, Calendar & Stats
• Write notes after each reading session in your personal reading journal.
• Revisit your quotes and reflections book by book.
• See your daily reading log at a glance on the monthly reading calendar.
• Look back on books, pages, hours and quotes with reading stats by week, month, year or all time.
🎀 Dress Up Your Cat & Cozy Bookstore
• Dress your cat in adorable outfits and costumes.
• Change the mood of your reading room with themes and seasonal themes.
• Relax in a warm cat bookstore with charming props and soothing music. Too bright? Turn off the main light and switch on the desk lamp.
• Your bookshelf fills up as you finish more books.
👀 Explore Libraries & Popular Books
• Visit other readers' libraries and discover new books through their reading records and quotes.
• Browse the rankings of popular books to find your next read.
✨ More Features
• Import and export your library with CSV or Excel (XLSX)
• Dark mode and accent color themes
• Home screen widget
🌸 Perfect For
• Anyone who wants to build a reading habit
• Readers looking for a cozy reading tracker or book journal
• Quote collectors and journaling lovers
• Book lovers who adore cats
Your cat is already waiting for you in Cat's Library. 🐾
📮 Contact & News
• Email: [email protected]
• Instagram & Threads: @take_a.book.en
• X: @Cats_Library_
What's new in 2.1.16
New Features & Improvements
• You can now pick several books and add them to a Shelf folder all at once.
• New Russian Blue and Cow cat coats are now in the Cat tab of the Shop.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.
• You can now pick several books and add them to a Shelf folder all at once.
• New Russian Blue and Cow cat coats are now in the Cat tab of the Shop.
Bug Fixes
• Fixed minor issues that could occur during use.
Service Optimization
• Improved the UI and enhanced app stability for a smoother experience.
Store changes
What Cat's Library - Book Tracker changed on its store page: name, icon, screenshots, price, size, languages, requirements.
New icon
→ Description updated
Short description updated
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