KCLS vs Libby, the library app
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KCLS
Manage your library account conveniently from your mobile device. Discover new books, place holds, renew borrowed items, and easily locate library branches and their hours.
- Discover and search library collection
- Place, manage, and cancel holds
- Renew borrowed items
- Rate and save titles
- Find library locations and hours
- Browse bestsellers and new arrivals
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Save time by managing your King County Library System (KCLS) account on your mobile device. The KCLS app makes it easy to discover and rate titles, place holds, renew items, and find library locations. Features: • Find items in our collection, using filters to zero-in on what you’re looking for • Browse bestsellers, new arrivals, and recent reader reviews • Check title availability and map locations where titles are available now • Place, suspend, activate, and cancel holds • Renew items • Rate and save titles to Shelves • Find library hours and get directions to the nearest location
Libby, the library app
Access millions of free ebooks and audiobooks from your local library. Borrow titles instantly with your library card, download for offline enjoyment, and enjoy a customizable reading and listening experience.
- Borrow ebooks and audiobooks
- Download for offline access
- Send ebooks to Kindle
- Adjust reader settings
- Customize audio player
- Create book lists
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Libby connects you to your local library’s collection of ebooks, audiobooks, magazines, and more. With just your library card, you can instantly read or listen to books on your phone or tablet — for free, thanks to your public library! Browse and borrow everything from timeless classics to the latest New York Times bestsellers, and enjoy your next great read anytime, anywhere. What You Can Do with Libby - Browse your library’s digital catalog of books - Borrow and enjoy ebooks, audiobooks, and magazines - Send ebooks to your Kindle (U.S. libraries only) - Listen to audiobooks through Apple CarPlay - Download titles for offline reading, or stream them to save space - Use tags to create to-be--read lists or organize your favorite titles - Keep your reading position with automatic syncing across all your devices A Beautiful Reading Experience Enjoy a seamless reading experience with Libby’s elegant, easy-to-use ebook reader: - Adjust text size, background color, and book design to fit your preferences - Zoom into magazines, comics, and graphic novels - Define and search for words or phrases instantly - Read and listen to interactive read-alongs with your kids - Add bookmarks, notes, and highlights to personalize your reading An Immersive Audiobook Player Libby’s audiobook player makes listening effortless and enjoyable: - Slow down or speed up playback (0.6x to 3.0x) - Set a sleep timer for nighttime listening - Swipe easily to skip forward or backward - Add bookmarks, notes, and highlights as you listen Read Anywhere, Anytime Libby is designed for everyone, including kids, teens, and adults. Whether you’re exploring new stories, catching up on bestsellers, or revisiting your favorite books, Libby keeps reading simple, fun, and accessible. Built by OverDrive, Libby proudly supports public libraries and the joy of reading for all. Download Libby today and turn your device into your personal library.
Screenshots
Verdict
The clearest difference is review sentiment: Libby, the library app at 84% against KCLS's 28%. Libby, the library app also leads on rating (4.9 vs 3.9) and ratings volume (4.5M vs 16). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Libby, the library app holds the better App Store score, 4.9 against 3.9. That said, the two scores are not equally well evidenced: Libby, the library app has 4.5M ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 28% of KCLS's written reviews are positive against 84% of Libby, the library app's.
KCLS ships an update every 3 months, Libby, the library app monthly. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.
| Parameter | KCLS | Libby, the library app |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (16 ratings) | 4.9 (4.5M ratings) — better |
| Positive reviews | 27.5% of reviews | 83.8% of reviews — better |
| Number of ratings | 16 | 4.5M — better |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | — | #2 — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 5 MB |
| Age rating | 4+ | 9+ |
| Developer | King County Library System | OverDrive, Inc. |
Customer experience
KCLS
Libby, the library app
User reviews
KCLS
From 16 App Store ratingsWhat we love
- 👍 Easy to log in
- 👍 Fun books to read
- 👍 Excellent app
- 👍 Helpful for all ages
- 👍 Convenient for managing holds
Room to improve
- 🐛 Unreliable app
- 🐛 Constant sign in issues
- 🐛 Failed sign in attempts count against user
- 🐛 Return book function doesn't work
- 🐛 Search bar coded too narrowly
Libby, the library app
From 4.5M App Store ratingsWhat we love
- 📚 Extensive library of books and audiobooks
- 🔍 Convenient search and browsing features
- 🔖 Easy to manage holds and returns
- 🔄 Seamless syncing across devices
- 🕰️ Automatic returns to avoid late fees
Room to improve
- 🕰️ Long wait times for popular titles
- 🔍 Confusing search and filtering options
- 🤯 Buggy and unstable performance
- 🔒 Lack of offline reading/listening
- 📚 Limited selection in some genres
Bugs and requests
KCLS
Reported bugs
173 issues- Keeps logging out
- Constant sign in issues
- Failed sign in attempts count against user
- Return book function doesn't work
- Search bar coded too narrowly
Show 168 moreShow fewer
- No notifications for holds ready
- App times out
- Bookshelf features show blank
- Glitching frequently
- Kicks user out
- Won't accept card or passcode
- System errors after login prompts
- Search results blank
- Borrowing tab won't show books
- Opening a book doesn't work
- App crashes when viewing 'For Later' shelf
- App loads website in all views
- Navigation is a mess
- Wasted space
- Hard to find things
- App gets worse with each update
- Developers lack common sense
- Borrowing section takes long to load
- Borrowing section often blank
- App not reliable
- App didn't resize on iPad
- App remains small on iPad
- Confusing new UI
- Horrid update
- New version doesn't let you search by genre
- New version doesn't let you search by type of item
- App bounces user to multiple other apps
- Forces multiple sign-ins
- Doesn't work in the end
- Completely useless
- Confusing vocabulary
- Counterintuitive product
- Horrible new update
- App is slow
- Cumbersome new version
- Less visually attractive new version
- Missing 'On Order' filter
- Lacks website functionalities
- Awful new version
- Not visual
- Not user friendly
- Worst App ever
- Missing 'Just Ordered' option
- Useless to user
- Landing page shows holds, not borrowed
- Takes long to open Borrowing page
- Real drag to wait every time
- Easier to use browser version
- Black bars on top and bottom of iPhone X screen
- App is adequate at best
- App is unloved compared to website
- Design is outdated
- Keyboard and popup windows target non-Retina devices
- App forced into portrait on iPad
- Cannot be used in landscape on iPad
- Does not scale to iPad screen
- App is almost unusable due to instability
- Very buggy
- Features to refine searches not working
- 'Done' button doesn't work for refinements
- 'Done' or 'Cancel' button doesn't work for refinements
- 'Refine' feature stopped working
- 'DONE' button for refining results isn't working
- App looks horrible on an iPad
- App keeps crashing
- App closes within seconds of opening
- App tells user something's on hold when it's not
- Lag with dialogue boxes
- Invalid Patron Access error
- App had a bunch of issues initially
- App won't stay open
- Redirected to mobile website for holds
- Redirected to mobile website for ebooks
- Slow when placing a hold
- Slow when checking account
- Difficulties with logging in/out
- Difficulties with changing accounts
- Can't suggest authors
- Can't recommend other books in a series
- Doesn't mark books read through Overdrive app
- New version is confusing
- New version is slow
- New UI very difficult to use
- Cannot listen to audiobooks through Apple Music
- App gets worse with each update
- Developers lack common sense
- App times out
- Bookshelf features show blank
- Glitching frequently
- Kicks user out
- Won't accept card or passcode
- System errors after login prompts
- Search results blank
- Borrowing tab won't show books
- Opening a book doesn't work
- App crashes when viewing 'For Later' shelf
- App loads website in all views
- Navigation is a mess
- Wasted space
- Hard to find things
- App gets worse with each update
- Developers lack common sense
- Borrowing section takes long to load
- Borrowing section often blank
- App not reliable
- App didn't resize on iPad
- App remains small on iPad
- Confusing new UI
- Horrid update
- New version doesn't let you search by genre
- New version doesn't let you search by type of item
- App bounces user to multiple other apps
- Forces multiple sign-ins
- Doesn't work in the end
- Completely useless
- Confusing vocabulary
- Counterintuitive product
- Horrible new update
- App is slow
- Cumbersome new version
- Less visually attractive new version
- Missing 'On Order' filter
- Lacks website functionalities
- Awful new version
- Not visual
- Not user friendly
- Worst App ever
- Missing 'Just Ordered' option
- Useless to user
- Landing page shows holds, not borrowed
- Takes long to open Borrowing page
- Real drag to wait every time
- Easier to use browser version
- Black bars on top and bottom of iPhone X screen
- App is adequate at best
- App is unloved compared to website
- Design is outdated
- Keyboard and popup windows target non-Retina devices
- App forced into portrait on iPad
- Cannot be used in landscape on iPad
- Does not scale to iPad screen
- App is almost unusable due to instability
- Very buggy
- Features to refine searches not working
- 'Done' button doesn't work for refinements
- 'Done' or 'Cancel' button doesn't work for refinements
- 'Refine' feature stopped working
- 'DONE' button for refining results isn't working
- App looks horrible on an iPad
- App keeps crashing
- App closes within seconds of opening
- App tells user something's on hold when it's not
- Lag with dialogue boxes
- Invalid Patron Access error
- App had a bunch of issues initially
- App won't stay open
- Redirected to mobile website for holds
- Redirected to mobile website for ebooks
- Slow when placing a hold
- Slow when checking account
- Difficulties with logging in/out
- Difficulties with changing accounts
- Can't suggest authors
- Can't recommend other books in a series
- Doesn't mark books read through Overdrive app
- New version is confusing
- New version is slow
- New UI very difficult to use
Requested features
23 requests- Correct misspellings in search
- Allow less than exact search terms
- Auto-correction in search
- Word suggestion in search
- Dark mode option
Show 18 moreShow fewer
- Filter search by genre
- Filter search by subject
- See reviews and comments in app
- Limit search to specific word and exclude derivatives
- Predictive text feature in search
- Add library card to Apple Wallet
- Optimize for iPhone X screen
- Suggest authors, not just books
- Mark books as read through Overdrive app
- Push notifications for holds/due dates
- Account overview/summary screen
- Return 'On Order' filter
- Return 'Just Ordered' filter
- Dark mode
- Advanced search filters
- Improved search functionality
- Better iPad optimization
- Push notifications
Libby, the library app
Reported bugs
5 issues- Frequent app crashes and freezes
- Issues with downloading and syncing content
- Unreliable playback controls for audiobooks
- Inconsistent behavior when placing holds
- Disappearing reading history and bookmarks
Requested features
6 requests- Ability to search across multiple libraries
- Custom reading/listening speed controls
- Improved recommendation and discovery tools
- Option to purchase unavailable titles
- Customizable reading experience (fonts, themes)
Show 1 moreShow fewer
- Integration with other e-book/audiobook services
In-app purchases
KCLS
No in-app purchases
Libby, the library app
No in-app purchases
Questions
Is KCLS free?
Is Libby, the library app free?
Which has better reviews, KCLS or Libby, the library app?
Do KCLS or Libby, the library app have ads?
Which is updated more often, KCLS or Libby, the library app?
Other comparisons
