Cat's Library - Book Tracker: iPhone vs Android
Cat's Library - Book Tracker gets 100+ downloads a day worldwide (AppInsider estimate, September 2026, rounded down to a band).
Cat's Library - Book Tracker by Lo-Fi Labs Inc. is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Rating
4.8 ★
1.9k ratings, both stores
Measured
Best rank now
#56
Android · 
Books & Reference Free
Books & Reference FreeMeasured
App Store
App details
App ID
6752113848
Publisher
Lo-Fi Labs Inc.
Publisher country
South Korea
Minimum OS
iOS 16.6+
Content rating
4+
Languages
9
EN FR DE ID JA KO ZH ES ZH
Size
206 MB
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 |
|---|---|---|
| iPhone | 100+ | 10k+ |
| Google Play | 100+ | 50k+ Measured |
| Total | 100+ Confidence | 50k+ Confidence |
How this is calculated
iPhone: 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: In-app purchase-led
How Cat's Library - Book Tracker makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 2 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 4.8 ★ | 630 |
| Google Play | 4.8 ★ | 1.3k 108 written reviews |
| Both stores | 4.8 ★ weighted by ratings | 1.9k |
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!
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!
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Cat's Library - Book Tracker iPhone
고양이 책집사 - 독서 기록, 문장 수집 앱
Cat's Library - Book Tracker gets 100+ downloads a day worldwide (AppInsider estimate, September 2026, rounded down to a band).
Cat's Library - Book Tracker is #127 in Books Free in Japan and charting in 2 of 24 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperLo-Fi Labs Inc.
CategoryBooks
PriceFree
Released
Rating★ 4.8 (630)
Version2.1.2
Age rating4+
First seen by us 24 Sep 2026
24 Sep 2026Installs (est.)10k+ worldwide
Rating
4.8 ★
630 ratings
Measured
Best rank now
#127
Books FreeMeasured
Cat's Library - Book Tracker on the App Store
App details
App ID
6752113848
Publisher
Lo-Fi Labs Inc.
Publisher country
South Korea
Minimum OS
iOS 16.6+
Content rating
4+
Languages
9
EN FR DE ID JA KO ZH ES ZH
Size
206 MB
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. iPhone 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 on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Cat's Library - Book Tracker makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 2 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | BooksFree | #127 |
| South Korea | BooksFree | #59 |
Apps near Cat's Library - Book Tracker on the chart
Books Free, around #127.
Ratings
App Store, worldwide.
Rating
4.8 ★
630 ratings
Measured
Ratings
630
Measured
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!
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!
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Latest updates
2.1.2
Cat's Library - Book Tracker Android
Cat's Library - Book Tracker gets 100+ downloads a day worldwide (AppInsider estimate, September 2026, rounded down to a band).
Cat's Library - Book Tracker is #93 in Books & Reference Free on Google Play in Japan and charting in 2 of 15 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperLo-Fi Labs Inc.
CategoryBooks & Reference
PriceFree
Released
Installs50k+
Rating★ 4.8 (1.3k)
Updated
Content ratingEveryone
Rating
4.8 ★
1.3k ratings
Measured
Best rank now
#93
Books & Reference FreeMeasured
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 on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Cat's Library - Book Tracker makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 2 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 15 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | Books & ReferenceFree | #93 |
| South Korea | Books & ReferenceFree | #56 |
Apps near Cat's Library - Book Tracker on the chart
Books & Reference Free, around #93.
Ratings
Google Play, worldwide.
Rating
4.8 ★
1.3k ratings
Measured
Ratings
1.3k
Measured
Written reviews
108
Measured
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 alongside adorable cats, record your reading sessions, and get gentle encouragement from your feline companions.
If you want to make reading a habit or build your own cozy library, join Cat's Library today.
🐾 Reading with Cats
Read books with cute cats using the reading timer.
Track your reading time in real time — a gentle reading tracker that logs every session, while your cat curls up to rest beside you.
Experience both motivation and healing through reading with cats — not "reading alone."
🎀 Dress Up Your Cat
Make your feline book butler truly yours.
Customize your cat with adorable outfits and costumes, and decorate your reading room with cozy themes.
The more you read, the more ways you unlock to express your style.
🐱 Cat Bookstore
Step into a warm, cozy, cat-themed bookstore filled with charming props and soothing music.
If it feels too bright, turn off the main light and switch on your desk lamp.
Collected quotes are pinned to your quote board, and your bookshelf grows as you read more books.
📚 My Library & TBR List
Use the book tracker to organize your library into To Read, Currently Reading, and Finished.
Easily add new books through search, manual entry, or barcode scan.
Can't decide what to read next?
Let your cat recommend a book from your TBR (To Be Read) list.
👀 Explore Other Libraries
Reading is better together.
Visit other readers' libraries, browse their bookshelves, and discover what the book community is reading right now.
Get inspired by fellow book lovers' collections and reading records.
📈 Popular Books & Rankings
Wondering what to read next?
Check the rankings of popular books loved by other readers, and find your next favorite among trending titles and bestsellers.
✏️ Reading Records — Your Reading Journal
Leave notes about your thoughts or feelings after each reading session in your personal reading journal.
Review collected quotes and reflections by book, and trace the emotional journey of your reading life.
💬 Quote Collection
Found a quote you love? Capture it instantly.
Use the camera OCR feature to recognize text and save it effortlessly — no typing required.
🗓️ Reading Calendar & Reading Log
Check your daily and monthly reading log at a glance with the reading calendar.
See how your consistency builds your own Cat's Library over time.
📊 Reading Recap
Look back at your books, pages, hours and quotes — all in numbers.
See how your reading life adds up by week, month, year, or all time.
🌸 A Cozy Home for Your Reading Life
Cat's Library goes beyond a simple reading tracker.
It's a cozy space where cats and books meet — a book tracker, reading journal, book community, and quote collection in one,
where you can build habits, find comfort, and cherish your reading memories.
Start your journey as a book butler today —
your cat is already waiting for you in Cat's Libra
With Cat's Library, reading is no longer a solitary activity.
Become a book butler, read alongside adorable cats, record your reading sessions, and get gentle encouragement from your feline companions.
If you want to make reading a habit or build your own cozy library, join Cat's Library today.
🐾 Reading with Cats
Read books with cute cats using the reading timer.
Track your reading time in real time — a gentle reading tracker that logs every session, while your cat curls up to rest beside you.
Experience both motivation and healing through reading with cats — not "reading alone."
🎀 Dress Up Your Cat
Make your feline book butler truly yours.
Customize your cat with adorable outfits and costumes, and decorate your reading room with cozy themes.
The more you read, the more ways you unlock to express your style.
🐱 Cat Bookstore
Step into a warm, cozy, cat-themed bookstore filled with charming props and soothing music.
If it feels too bright, turn off the main light and switch on your desk lamp.
Collected quotes are pinned to your quote board, and your bookshelf grows as you read more books.
📚 My Library & TBR List
Use the book tracker to organize your library into To Read, Currently Reading, and Finished.
Easily add new books through search, manual entry, or barcode scan.
Can't decide what to read next?
Let your cat recommend a book from your TBR (To Be Read) list.
👀 Explore Other Libraries
Reading is better together.
Visit other readers' libraries, browse their bookshelves, and discover what the book community is reading right now.
Get inspired by fellow book lovers' collections and reading records.
📈 Popular Books & Rankings
Wondering what to read next?
Check the rankings of popular books loved by other readers, and find your next favorite among trending titles and bestsellers.
✏️ Reading Records — Your Reading Journal
Leave notes about your thoughts or feelings after each reading session in your personal reading journal.
Review collected quotes and reflections by book, and trace the emotional journey of your reading life.
💬 Quote Collection
Found a quote you love? Capture it instantly.
Use the camera OCR feature to recognize text and save it effortlessly — no typing required.
🗓️ Reading Calendar & Reading Log
Check your daily and monthly reading log at a glance with the reading calendar.
See how your consistency builds your own Cat's Library over time.
📊 Reading Recap
Look back at your books, pages, hours and quotes — all in numbers.
See how your reading life adds up by week, month, year, or all time.
🌸 A Cozy Home for Your Reading Life
Cat's Library goes beyond a simple reading tracker.
It's a cozy space where cats and books meet — a book tracker, reading journal, book community, and quote collection in one,
where you can build habits, find comfort, and cherish your reading memories.
Start your journey as a book butler today —
your cat is already waiting for you in Cat's Libra
What's new in 2.1.2
New 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.
• 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.