udn 讀書館: iPhone vs Android
udn 讀書館 by udn.com 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
2.9 ★
470 ratings, both stores
Measured
Best rank now
#44
Android · 
Books & Reference Free
Books & Reference FreeMeasured
App Store
App details
App ID
1342153816
Publisher
udn.com Co., Ltd.
Publisher country
大同路一段３６９號３樓
On the store since
Mar 2018
8 years on the store
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
17+
5 content notes below
Languages
3
EN ZH ZH
Size
66 MB
Also listed in
Books, Lifestyle
Content notesInfrequent/Mild Horror/Fear ThemesInfrequent/Mild Profanity or Crude HumourUnrestricted Web AccessInfrequent/Mild Alcohol, Tobacco, or Drug Use or ReferencesInfrequent/Mild Medical/Treatment Information
Google Play
App details
App ID
com.udn.dp.books.lib.android
Publisher
聯合線上股份有限公司
Publisher country
大同路一段３６９號３樓
Content rating
Teen
udn 讀書館 downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | – | – |
| Google Play | 10+ | 50k+ Measured |
| Total | 10+ 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 udn 讀書館'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
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.
Business model: Ad-led
How udn 讀書館 makes money: subscriptions, one-off purchases and ads.
Ads · 9 ad networks
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 | 2.7 ★ | 242 |
| Google Play | 3.0 ★ | 228 3 written reviews |
| Both stores | 2.9 ★ weighted by ratings | 470 |
About udn 讀書館
The exclusive service and new experience. The udn library app integrates the major libraries’ lending services, providing readers free mobile borrowing services of electronic books, magazines, and newspaper. Download the udn library app on your mobile devices, you can enjoy reading anywhere. Plus, you can read the latest, most popular, and most abundant contents the way you like.
# All Libraries in one app
The udn library app provides readers with e-books borrowing services from all the cooperated libraries. Log in with your library accounts or mobile library accounts, and access to all digital reading contents from the libraries for free.
# The innovative user interface
In our app, you can borrow all the library e-books with a single bookshelf, and borrow e-books via QR Codes. Enjoy the simple and fluently app experience.
# The complete digital library experience
You can borrow or reserve the e-books you like in digital libraries, and the e-books you borrowed will be returned automatically when they are dated. Your personal reading progress and history will also be recorded. Moreover, you can highlight the lines you like and take notes in the e-books.
# Offline reading
The electronic books, magazines, and newspaper can be downloaded to your devices, and be read without internet services.
# PDF and EPUB Formats are supported
You can switch between the tablet-friendly PDF format and the phone-friendly EPUB format freely.
# User-friendly reading settings
-Electronic books, magazines, and newspapers of the PDF format-
‧ The screen brightness is adjustable in time
‧ Switch your reading direction freely
‧ Your zoom-in setting will be applied to all pages automatically
- E-books of the EPUB format-
‧ The screen brightness is adjustable in time
‧ Adjust text size and page width
‧ Switch between "daytime" and "Night" reading mode freely
‧ Select your page changing mode between "turning" and "scrolling."
# Abundant and amazing digital contents
Cooperating with hundreds of publishers, providing tens of thousands of e-books, latest e-magazines, and daily e-newspapers of the UDN group, you can definitely find the digital contents you like.
# All Libraries in one app
The udn library app provides readers with e-books borrowing services from all the cooperated libraries. Log in with your library accounts or mobile library accounts, and access to all digital reading contents from the libraries for free.
# The innovative user interface
In our app, you can borrow all the library e-books with a single bookshelf, and borrow e-books via QR Codes. Enjoy the simple and fluently app experience.
# The complete digital library experience
You can borrow or reserve the e-books you like in digital libraries, and the e-books you borrowed will be returned automatically when they are dated. Your personal reading progress and history will also be recorded. Moreover, you can highlight the lines you like and take notes in the e-books.
# Offline reading
The electronic books, magazines, and newspaper can be downloaded to your devices, and be read without internet services.
# PDF and EPUB Formats are supported
You can switch between the tablet-friendly PDF format and the phone-friendly EPUB format freely.
# User-friendly reading settings
-Electronic books, magazines, and newspapers of the PDF format-
‧ The screen brightness is adjustable in time
‧ Switch your reading direction freely
‧ Your zoom-in setting will be applied to all pages automatically
- E-books of the EPUB format-
‧ The screen brightness is adjustable in time
‧ Adjust text size and page width
‧ Switch between "daytime" and "Night" reading mode freely
‧ Select your page changing mode between "turning" and "scrolling."
# Abundant and amazing digital contents
Cooperating with hundreds of publishers, providing tens of thousands of e-books, latest e-magazines, and daily e-newspapers of the UDN group, you can definitely find the digital contents you like.
udn 讀書館 iPhone
Not in any tracked top chart right now.
Updated 25 Oct 2026 · rankings refresh through the day
Developerudn.com
CategoryBooks
PriceFree
Released
Rating★ 2.7 (242)
Version1.35.0
Age rating17+
First seen by us 2 Oct 2026
2 Oct 2026Rating
2.7 ★
242 ratings
Measured
udn 讀書館 on the App Store
App details
App ID
1342153816
Publisher
udn.com Co., Ltd.
Publisher country
大同路一段３６９號３樓
On the store since
Mar 2018
8 years on the store
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
17+
5 content notes below
Languages
3
EN ZH ZH
Size
66 MB
Also listed in
Books, Lifestyle
Content notesInfrequent/Mild Horror/Fear ThemesInfrequent/Mild Profanity or Crude HumourUnrestricted Web AccessInfrequent/Mild Alcohol, Tobacco, or Drug Use or ReferencesInfrequent/Mild Medical/Treatment Information
udn 讀書館 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 udn 讀書館'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
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.
Business model: Ad-led
How udn 讀書館 makes money: subscriptions, one-off purchases and ads.
Ads · 9 ad networks
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
2.7 ★
242 ratings
Measured
Ratings
242
Measured
About udn 讀書館
The exclusive service and new experience. The udn library app integrates the major libraries’ lending services, providing readers free mobile borrowing services of electronic books, magazines, and newspaper. Download the udn library app on your mobile devices, you can enjoy reading anywhere. Plus, you can read the latest, most popular, and most abundant contents the way you like.
# All Libraries in one app
The udn library app provides readers with e-books borrowing services from all the cooperated libraries. Log in with your library accounts or mobile library accounts, and access to all digital reading contents from the libraries for free.
# The innovative user interface
In our app, you can borrow all the library e-books with a single bookshelf, and borrow e-books via QR Codes. Enjoy the simple and fluently app experience.
# The complete digital library experience
You can borrow or reserve the e-books you like in digital libraries, and the e-books you borrowed will be returned automatically when they are dated. Your personal reading progress and history will also be recorded. Moreover, you can highlight the lines you like and take notes in the e-books.
# Offline reading
The electronic books, magazines, and newspaper can be downloaded to your devices, and be read without internet services.
# PDF and EPUB Formats are supported
You can switch between the tablet-friendly PDF format and the phone-friendly EPUB format freely.
# User-friendly reading settings
-Electronic books, magazines, and newspapers of the PDF format-
‧ The screen brightness is adjustable in time
‧ Switch your reading direction freely
‧ Your zoom-in setting will be applied to all pages automatically
- E-books of the EPUB format-
‧ The screen brightness is adjustable in time
‧ Adjust text size and page width
‧ Switch between "daytime" and "Night" reading mode freely
‧ Select your page changing mode between "turning" and "scrolling."
# Abundant and amazing digital contents
Cooperating with hundreds of publishers, providing tens of thousands of e-books, latest e-magazines, and daily e-newspapers of the UDN group, you can definitely find the digital contents you like.
# All Libraries in one app
The udn library app provides readers with e-books borrowing services from all the cooperated libraries. Log in with your library accounts or mobile library accounts, and access to all digital reading contents from the libraries for free.
# The innovative user interface
In our app, you can borrow all the library e-books with a single bookshelf, and borrow e-books via QR Codes. Enjoy the simple and fluently app experience.
# The complete digital library experience
You can borrow or reserve the e-books you like in digital libraries, and the e-books you borrowed will be returned automatically when they are dated. Your personal reading progress and history will also be recorded. Moreover, you can highlight the lines you like and take notes in the e-books.
# Offline reading
The electronic books, magazines, and newspaper can be downloaded to your devices, and be read without internet services.
# PDF and EPUB Formats are supported
You can switch between the tablet-friendly PDF format and the phone-friendly EPUB format freely.
# User-friendly reading settings
-Electronic books, magazines, and newspapers of the PDF format-
‧ The screen brightness is adjustable in time
‧ Switch your reading direction freely
‧ Your zoom-in setting will be applied to all pages automatically
- E-books of the EPUB format-
‧ The screen brightness is adjustable in time
‧ Adjust text size and page width
‧ Switch between "daytime" and "Night" reading mode freely
‧ Select your page changing mode between "turning" and "scrolling."
# Abundant and amazing digital contents
Cooperating with hundreds of publishers, providing tens of thousands of e-books, latest e-magazines, and daily e-newspapers of the UDN group, you can definitely find the digital contents you like.
Latest updates
1.35.0
We still continue to be optimized, and we hope to provide a wonderful experience!
- Operating system improvements and capabilities
More from udn.com
udn 讀書館 Android
udn 讀書館 is #44 in Books & Reference Free on Google Play in Taiwan and charting in 1 of 23 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
Developerudn.com
CategoryBooks & Reference
PriceFree
Released
Installs50k+
Rating★ 3.0 (228)
Updated
Content ratingTeen
Rating
3.0 ★
228 ratings
Measured
Best rank now
#44
Books & Reference FreeMeasured
udn 讀書館 on Google Play
App details
App ID
com.udn.dp.books.lib.android
Publisher
聯合線上股份有限公司
Publisher country
大同路一段３６９號３樓
Content rating
Teen
udn 讀書館 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 udn 讀書館'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
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.
Business model: Ad-led
How udn 讀書館 makes money: subscriptions, one-off purchases and ads.
Ads · 9 ad networks
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Taiwan | Books & ReferenceFree | #44 |
Apps near udn 讀書館 on the chart
Books & Reference Free, around #44.
Ratings
Google Play, worldwide.
Rating
3.0 ★
228 ratings
Measured
Ratings
228
Measured
Written reviews
3
Measured
About udn 讀書館
# All Libraries in one app
The udn library app provides readers with e-books borrowing services from all the cooperated libraries. Log in with your library accounts or mobile library accounts, and access to all digital reading contents from the libraries for free.
# The innovative user interface
In our app, you can borrow all the library e-books with a single bookshelf, and borrow e-books via QR Codes. Enjoy the simple and fluently app experience.
# The complete digital library experience
You can borrow or reserve the e-books you like in digital libraries, and the e-books you borrowed will be returned automatically when they are dated. Your personal reading progress and history will also be recorded. Moreover, you can highlight the lines you like and take notes in the e-books.
# Offline reading
The electronic books, magazines, and newspaper can be downloaded to your devices, and be read without internet services.
# PDF and EPUB Formats are supported
You can switch between the tablet-friendly PDF format and the phone-friendly EPUB format freely.
# User-friendly reading settings
-Electronic books, magazines, and newspapers of the PDF format-
‧ The screen brightness is adjustable in time
‧ Switch your reading direction freely
‧ Your zoom-in setting will be applied to all pages automatically
- E-books of the EPUB format-
‧ The screen brightness is adjustable in time
‧ Adjust text size and page width
‧ Switch between "daytime" and "Night" reading mode freely
‧ Select your page changing mode between "turning" and "scrolling."
# Abundant and amazing digital contents
Cooperating with hundreds of publishers, providing tens of thousands of e-books, latest e-magazines, and daily e-newspapers of the UDN group, you can definitely find the digital contents you like.
The udn library app provides readers with e-books borrowing services from all the cooperated libraries. Log in with your library accounts or mobile library accounts, and access to all digital reading contents from the libraries for free.
# The innovative user interface
In our app, you can borrow all the library e-books with a single bookshelf, and borrow e-books via QR Codes. Enjoy the simple and fluently app experience.
# The complete digital library experience
You can borrow or reserve the e-books you like in digital libraries, and the e-books you borrowed will be returned automatically when they are dated. Your personal reading progress and history will also be recorded. Moreover, you can highlight the lines you like and take notes in the e-books.
# Offline reading
The electronic books, magazines, and newspaper can be downloaded to your devices, and be read without internet services.
# PDF and EPUB Formats are supported
You can switch between the tablet-friendly PDF format and the phone-friendly EPUB format freely.
# User-friendly reading settings
-Electronic books, magazines, and newspapers of the PDF format-
‧ The screen brightness is adjustable in time
‧ Switch your reading direction freely
‧ Your zoom-in setting will be applied to all pages automatically
- E-books of the EPUB format-
‧ The screen brightness is adjustable in time
‧ Adjust text size and page width
‧ Switch between "daytime" and "Night" reading mode freely
‧ Select your page changing mode between "turning" and "scrolling."
# Abundant and amazing digital contents
Cooperating with hundreds of publishers, providing tens of thousands of e-books, latest e-magazines, and daily e-newspapers of the UDN group, you can definitely find the digital contents you like.
What's new in 1.37.0
We still continue to be optimized, and we hope to provide a wonderful experience!
- Operating system improvements and capabilities
- Operating system improvements and capabilities