Best Free Book Catalog Apps in 2026 (Ranked and Compared)

A book catalog app turns your physical collection into a searchable, organized digital library. You scan books with your phone, they appear with title, author, cover image, and metadata, and you build a record of what you own over time.

The best one for you depends on what you prioritize. Metadata depth? Family sharing? Cross-platform access? The apps in this comparison each do something well — and none of them does everything equally well.

Quick comparison

The apps

Plumerie

Plumerie is a personal library app built around the use cases that most catalog apps neglect: family sharing, lending tracking, and multi-location management. The catalog is shared across a household rather than siloed to one person, and lending is integrated with the catalog — when you log a loan, the book shows as "out" in your library view.

Scanning: Works on any smartphone camera. Queries Google Books, Open Library, and regional databases. Fast — two to four seconds per book in good conditions. Supports both ISBN-13 and ISBN-10 with manual search fallback for books not found.

Metadata quality: Good for mainstream published books. Covers, titles, authors, publishers, years, and categories all come through reliably. Very obscure or limited-edition titles may require manual editing, which is straightforward.

Family sharing: The clearest differentiator. One catalog, multiple family member profiles. Each person tracks their own reading status and lending within the shared collection. No other app in this list handles household sharing this way.

Multi-location: Tag each book to a specific location — "Living room left," "Study top shelf," "Bedroom," and so on. Search across locations to find where any book is.

Lending: Log loans within the catalog: borrower name, date lent, due date. See all active loans in one view. When a book is out on loan, it shows as such when you browse your library.

Limitations: No Dewey Decimal classification. No custom metadata fields beyond the standard set. Newer app with a smaller community than LibraryThing. Not built for professional library management.

Best for: Families and households who share books, people with multi-room collections, anyone who lends frequently and wants tracking integrated with the catalog.

CLZ Books

CLZ Books is made by Collectorz.com, which has been building collection software since 1996 and is the choice for collectors who want maximum metadata depth. Available on iOS, Android, and desktop, with apps for every major platform. It has its own community database that supplements the major book APIs with user-contributed data — useful for obscure editions, collector's items, and books that don't appear in Google Books.

Scanning: Fast and reliable. The CLZ database covers a wide range of editions including variants that other apps miss. Series data, cover variants, and edition details are strong.

Metadata quality: The best in this comparison for depth. Multiple cover options, series metadata, publisher information, ISBNs for multiple editions. Serious collectors who care about which specific edition they own will find CLZ more satisfying than simpler apps.

Family sharing: Limited. CLZ is designed for individual use. There's a CLZ Cloud sync for your own devices, but not a household-sharing model.

Multi-location: Supported through the location/shelf field. Not as seamless as Plumerie's implementation, but functional.

Lending: Not a primary feature. Some manual workarounds but no dedicated lending view.

Cost: Paid. CLZ Books is a premium app — worth it for serious collectors, but overkill for casual personal libraries.

Best for: Collectors who care about edition-level detail and metadata accuracy. People with large collections of rare or obscure titles. Single users who don't need family sharing.

BookBuddy

Clean, well-designed iOS app with a focus on simplicity. Good barcode scanning, good cover images, and a straightforward interface that non-technical users find accessible. The experience on iPhone is polished in a way that web-first apps aren't.

Scanning: Fast on iOS. Good image quality for covers. Metadata is solid for mainstream titles.

Metadata quality: Good for the mainstream market. Less depth than CLZ for obscure titles or edition variants.

Family sharing: Not supported in a meaningful way. Single-user app.

Multi-location: Basic. A single location field per book, not a multi-location system.

Lending: Not a core feature.

Platform: iOS and Mac only. No Android, no web access. If your household uses mixed platforms or you want access from a computer, BookBuddy doesn't work.

Best for: iPhone users who want a simple, polished cataloging experience and don't need family sharing, cross-platform access, or lending tracking.

LibraryThing

LibraryThing is the oldest and most established personal library service. Its database — built from 20 years of user contributions and its own cataloging data — is extraordinary in depth and breadth. More than 155 million catalogued titles as of 2021. Common Knowledge (community-contributed metadata like series information, book awards, and common reader misconceptions) is genuinely valuable.

Scanning: Limited. LibraryThing's mobile apps include scanning, but the experience is not as streamlined as purpose-built scanning apps. For large scanning sessions, other apps are faster.

Metadata quality: Unmatched for depth and accuracy, especially for older, rarer, and foreign-language books. The community database fills gaps that Google Books doesn't.

Family sharing: Not available. LibraryThing has never built dedicated family or household sharing features. Community requests for multi-user home libraries have gone unimplemented.

Multi-location: Supported through tags and collections, but not a first-class feature in the interface.

Lending: Basic tracking exists but not prominently featured.

Cost: Free for personal use (unlimited cataloguing)

Interface: The web interface is from 2005 in spirit if not in pixel count. Mobile apps exist but are not as polished as native mobile-first apps. If you're comfortable with dense, information-rich interfaces, it's functional. If you want something that feels contemporary, it may frustrate.

Best for: Serious collectors and cataloging enthusiasts who value data depth over interface polish. People with large collections of rare or foreign-language titles. Single users who don't need family sharing or mobile-first design.

Libib

Web-based catalog with support for books, movies, music, and games. Popular for small libraries, book clubs, and personal collections that span multiple media types. Includes a lending module in the paid tier.

Scanning: Via webcam (desktop) or phone camera (mobile app). Functional but less optimized for a mobile shelf-scanning workflow than native phone apps.

Metadata quality: Good for mainstream books. Less depth than CLZ or LibraryThing for obscure titles.

Family sharing: Limited. Paid tiers include patron accounts suitable for book clubs or small lending libraries.

Multi-location: Basic.

Best for: People who want to catalog books, movies, and music together. Small book clubs. People comfortable with a browser-based interface.

Goodreads — not the right tool for cataloging

Goodreads is a social reading platform with a barcode scanner in its app. It lets you mark books as "read," "currently reading," or "want to read." But Goodreads is not a catalog app — it doesn't track what you physically own, doesn't let you record where books are located, doesn't manage lending, and has no household sharing model. Its "library" is a reading history, not an inventory of your shelves.

If you want to track reading progress in a social context, Goodreads is fine. If you want to catalog the books you own as physical objects, it's the wrong tool.

Choosing between them

If you share your collection with family: Plumerie is the only app here that handles this natively. No other app in this list treats the household as the library unit.

If you lend books to friends frequently: Plumerie's lending tracking is integrated with the catalog. Other apps treat lending as an afterthought.

If you're a serious collector who cares about edition detail: CLZ Books or LibraryThing, depending on whether you want a modern interface (CLZ) or maximum database depth (LibraryThing).

If you have an iPhone and want something simple: BookBuddy.

If you want the most book data available: LibraryThing's community database is unmatched, but the interface is dated.

For a broader comparison that includes reading tracker apps alongside catalog apps, see best book organizer apps for your home library. For the full cataloging workflow, see how to catalog your book collection at home.

Frequently asked questions

What is the best free book catalog app in 2026?

Plumerie is the best free book catalog app for most people in 2026. It's free for up to 100 books, works on any device via web browser, and includes barcode scanning, multi-location tracking, family sharing, and lending management. LibraryThing is also a strong free option, allowing up to 200 books for free with an excellent community database.

What is the difference between a book catalog app and a reading tracker?

A book catalog app focuses on managing the physical books you own — scanning ISBNs, organizing by location, tracking loans, and building an inventory of your collection. A reading tracker like Goodreads or StoryGraph focuses on logging what you've read and want to read. Some apps, like Plumerie, handle both.

Which book catalog app is best for families?

Plumerie is the only app in this comparison with native household sharing — one shared library that multiple family members can access, with individual reading status and lending tracked per person. CLZ Books, BookBuddy, and LibraryThing are all designed for individual use.

Can I catalog my entire home library by scanning barcodes?

Yes. Any published book with an ISBN barcode (printed on the back cover) can be cataloged by scanning with your phone camera. For books published before the 1970s, or regional books without ISBNs, you'll need to search manually by title or author. Apps like Plumerie support manual search as a fallback.

How many books can I catalog for free?

Plumerie's free tier supports up to 100 books. LibraryThing allows up to 200 books for free. CLZ Books has a limited free version. Goodreads has no book limit but is a reading tracker rather than a catalog. Plumerie's paid plan (€29.99/year) removes the book limit entirely.

Is Goodreads a good book catalog app?

No — Goodreads is a social reading tracker, not a catalog app. It doesn't track physical ownership, book locations, or lending. For cataloging the books you physically own, Plumerie or LibraryThing are better fits.

---

Plumerie is free to get started. Scan your collection, organize by location, track lending, and share with your household — all from a web app that works on any device. Try it free →