LibraryThing vs Stacks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LibraryThing
Catalog your personal book, DVD, and CD collections. Easily add items by searching or scanning barcodes. Enhance your catalog with high-resolution cover photos and browse your collection visually.
- Catalog books, DVDs, and CDs
- Search for media items
- Scan ISBN barcodes
- Add high-resolution cover photos
- Browse collection by cover type
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The LibraryThing app allows LibraryThing members to catalog and browse their collections. LibraryThing is focused on books, but you can add most media, including books, DVDs and CDs. LibraryThing relies on data from Amazon, and over 65 million library records. Add books by searching for them or scanning their ISBN barcode with the camera. Add high-resolution cover photos of your books with the cover editor and browse your books by cover type to find copies that need better covers.
Stacks
Digitally catalog your physical book collection by simply photographing your shelves. The app automatically identifies titles, authors, and covers, then organizes your library with smart sorting and insightful analytics. Never forget if you own a book or who borrowed it again.
- Scan entire bookshelves with one photo
- Automatic book identification (title, author, cover)
- Visual library display with spine width and color
- Smart sorting by author, genre, or color
- Track lent books and borrower information
- Personalized reading recommendations based on owned books
- AI-powered book concierge for recommendations and discussions
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Your shelves, in your pocket. Photograph a bookshelf and Stacks catalogs every book on it — titles, authors, covers, page counts — in one scan. No typing, no barcode-scanning books one at a time. Six shelves, one tap each, and your whole library is with you everywhere — on iPhone and iPad. SCAN A SHELF, GET YOUR LIBRARY • One photo catalogs an entire shelf — 20, 30, 40 books at once • Real cover art, page counts, and publication years fill in automatically • Honest AI: spines it can't read are flagged with their position, never guessed A LIBRARY THAT LOOKS LIKE A LIBRARY • The Shelf view renders your books as actual spines — width from page count, color from the real cover • Sort by author, genre, or color: your shelves as a rainbow • Grid and list views, search, and smart shelves: Unread, Favorites, Lent Out SCOUT SHELVES & BUILD A WISHLIST • Scout mode: point your camera at a bookstore or thrift-shop shelf and see which books fit your taste — before you buy • Librarian's picks: curated recommendations you can browse by category or search across the whole catalog • Add any book to your Library or your Want list in a tap — from picks, a scout, or a search KNOW YOUR OWN TASTE • Every scan reads your shelf and tells you something true about your taste • "Read next" picks come from books you already own — starting with your unread pile • Insights: pages owned, top genres, most-shelved authors, books added over time DESIGNED FOR IPHONE & IPAD • On iPad: a sidebar, multi-column shelves, and a two-page book view that fills the screen • Portrait or landscape, with Split View and Stage Manager • Your library and Want list stay in sync across devices NEVER LOSE A BOOK AGAIN • Standing in a bookstore wondering if you own it? Search your library in a second • The lending tracker remembers who borrowed what, and since when • Rate, mark read, and keep notes on every book YOUR LIBRARIAN (PRO) • A weekly note on what to start next — from your own unread shelves, with the reasons • Picks chosen for your shelves: real books you don't own yet, tuned to what you've loved • A book-loving AI that knows your entire library: what to read, buy, or gift — grounded in your actual shelves, not bestseller lists • Chat with any single book, in its own voice • Share a Shelfie: your library as a story card — rainbow shelf, reading fingerprint, most-shelved authors Your library is backed up privately and automatically — no account, no sign-up. New users get 3 free shelf scans. Try the Librarian free, then Stacks Pro unlocks the weekly note, personalized picks, unlimited chat, every Shelfie card and 50 scans a month: $4.99/month or $34.99/year with a 7-day free trial. Stacks is for people whose books are part of who they are. Scan your shelves and see your library the way it deserves to be seen. — Terms of Use: https://zencodex.io/apps/stacks/terms Privacy Policy: https://zencodex.io/apps/stacks/privacy
Screenshots
Verdict
The clearest difference is review sentiment: Stacks at 100% against LibraryThing's 47%. Stacks also leads on rating (5.0 vs 3.5) and update cadence (every 5 days vs every 4 weeks). LibraryThing's advantage is in-app purchases (none vs 4) and ratings volume (278 vs 1). On price, ads and device support 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. Stacks sells 4 in-app purchases, starting at $4.99 per month. LibraryThing asks for nothing beyond the download.
Stacks holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: LibraryThing has 278 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 47% of LibraryThing's written reviews are positive against 100% of Stacks's.
LibraryThing ships an update every 4 weeks, Stacks every 5 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.
| Parameter | LibraryThing | Stacks |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (278 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 47.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 278 — better | 1 |
| Update frequency | Every 4 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 9 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | LibraryThing.com | Zenmonkeys Digital LLC |
Customer experience
LibraryThing
Stacks
Bugs and requests
LibraryThing
Reported bugs
3 issues- Barcode scanner not working
- Books disappearing from catalog
- Editing and saving issues
Requested features
4 requests- Ability to create custom collections
- Offline access to library
- Integration with other book apps
- Lending/loan tracking feature
Stacks
Not enough reviews yet to summarise bugs or requests.
In-app purchases
LibraryThing
No in-app purchases
Stacks
- Pro Monthly$4.991 Month
- Pro Yearly7 Days trial$34.991 Year
- 3 Scans$0.99
- 15 Scans$3.99









