# CLZ Books - library organizer — Just scan ISBN barcodes > Scan ISBNs to automatically catalog and organize your book collection. (iPhone/iPad app by CLZ.) - Source: https://appshunter.io/ios/app/clz-books-library-organizer/id318799163 (this page in markdown: same URL + `.md`) - Developer: [CLZ](https://appshunter.io/developer/314588588) - Category: Books, Reference - Price: Free with in-app purchases - Rating: 4.80/5 from 2,582 App Store ratings · 481 written reviews indexed - Age rating: 9+ - Requires: iOS 13.0 · 28 MB - Languages: American English - Released: 2009-06-07 - Data updated: 2026-08-27 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/clz-books-library-organizer/id318799163/reviews.md ## What is CLZ Books? Easily catalog your book collection. Automatic book details, cover art and estimated values. Just scan ISBNs (barcode or text) or search our CLZ Core database by author and title. CLZ Books is a paid subscription app, costing US $1.99 per month or US $19.99 per year. Use the free 7-day trial to try all of the app's features and online services! == 2 easy ways to add books: == 1. Search our CLZ Core by ISBN: You can either scan ISBN barcodes or scan the ISBN numbers using OCR Guaranteed 98% success rate on ISBN lookups! 2. Search our CLZ Core by author and title Our CLZ Core online book database automatically provides cover images and full book details, like author, title, publisher, publication date, plot, genres, subjects, estimated pricing, etc.. == Edit all fields == Modify all automatically provided details from Core, like Authors, Titles, Publishers, Publications Dates, Plot descriptions, etc.. you can even upload your own cover art (front and back!). Add personal details like condition, location, purchase date / price / store, notes, etc.. Create your own Custom Fields so that you can catalog information for which the app does not have a built-in data field. == Create multiple collections == Collections will appear as Excel-like tabs at the bottom of your screen. E.g. for different people, to separate your physical books from your ebooks, to keep track of books you sold or have for sale, etc... == Fully customizable == Browse your book catalog as a list with small thumbnails or as cards with big images. Sort any way you want, e.g. by author, title, publication date, date added etc.. Group your books into folders by author, publisher, genre, subject, location, etc... == CLZ Cloud storage == Sync your data to the CLZ Cloud, to: * Always have an online backup of your book organizer database. * Sync your book library between multiple devices * View and share your book collection online == Got a question or need help? == We are always ready to help or to answer your questions, 7 days a week. Just use "Contact Support" or "CLZ Club forum" from the menu. == About CLZ == CLZ has been developing collection database software since 1996. Located in Amsterdam, the Netherlands, the CLZ team now consists of 12 guys and one gal. We're always working to bring you regular updates for the apps and software, and to keep our Core online databases up-to-date with all weekly releases. Our other CLZ apps: * CLZ Movies, for cataloging your DVDs, Blu-rays and 4K UHDs * CLZ Music, for creating a database of your CDs and vinyl records * CLZ Comics, for your collection of US comic books. * CLZ Games, for creating a database of your video game collection == What our users say == "A fantastically nice book library app that I am incredibly happy with, you really get an overview of the things that need to be sorted out, for a good overview, easy to use and everything works seamlessly. Strongly recommend." Emmanate (Norway) "The best I have found. I have over 1200 books and have used a number of book cataloging apps over the years. CLZ Books does the job of keeping track of my library and gets syncing right. Most importantly (speaking as a software developer) they keep improving the app. It’s tough to make a business of niche software products. These folks have apparently figured out how to make a go of it and they keep improving. Kudos to them!" LEK2 (USA) == About auto-renewable subscriptions == * The payment will be charged to your iTunes Account when you confirm the purchase. * The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. * Your account will be charged for renewal within 24-hours prior to the end of the current period. Automatic renewals will cost the same price you were originally charged for the subscription. ## Key features - Scan ISBN barcodes for automatic data retrieval - Search by author and title - Automatic book details, values, and cover art - Edit all book fields and add personal notes - Create multiple collections - Customizable browsing, sorting, and grouping - Cloud backup and multi-device syncing ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | CLZ Books (Pay Monthly) | $1.99 | per month | | CLZ Books (Pay Yearly) | $19.99 | per year | ## Chart rankings - #172 in Top Grossing · Book (US App Store) ## What do users think of CLZ Books? Overall sentiment: positive **Pros** - 📚 Excellent book cataloging app - 🔍 Helpful for avoiding duplicate purchases - 🔖 Ability to organize books into collections - 🔍 Useful for checking book inventory while shopping - 🔍 Comprehensive book database with good coverage - 🌟 Frequent app updates and improvements - 👨‍💻 Responsive and helpful customer support **Cons** - 🐛 Occasional sync issues or data loss - 💰 Subscription model can be expensive for some users - 🔍 Limited ability to add custom fields or notes - 🔍 Difficulty finding older books without ISBNs **Commonly reported bugs** - Crashes when removing books during sync - Issues with barcode scanning on newer devices **Most requested features** - Ability to track reading progress or notes - Option to export data in more formats - Improved search and filtering capabilities - Integration with other book-related apps or services ## Recent user reviews (10 of 481) All indexed reviews: https://appshunter.io/ios/app/clz-books-library-organizer/id318799163/reviews.md ### 4/5 — First Impressions fantastic then I hit a lot of “not founds” *2026-07-22* I found the speed at which one could add books was terrific. When I had a formatting error moving my Goodreads collection I simply pointed the camera at my screen where there were 200 barcodes. It just went ping, ping, ping and in a minute it identified most of the books. However quite a few of the books were not found and I came to the conclusion that the isbn database wasn’t as comprehensively full as it appeared. I also couldn’t understand why the “update from core” didn’t work to bring back the cover art without the barcode. It can find the books from title and author so why not provide a selection of covers. Early days but I’m going to pay the subscription because I’ve had $20 worth of fun from it. I just don’t understand why the developers can’t scrape data from the library of congress or the British library to get all the info of every book. ### 5/5 — Beste *2026-07-17* Ich liebe einfach alles an dieser App. Wenn man seine Bücher sortiert in einer App haben möchte und keine Social Media artigen Community Funktionen braucht, dann hat man hier alle Möglichkeiten und Freiheiten. ### 5/5 — Fabulous app *2026-07-07, version 10.7.3* This app is brilliant for recording books I have read or want to read. I no longer buy books I have already read ### 5/5 — Best out there *2026-06-26, version 10.7.3* This is by far the best book library on apple. So easy to add books to library and lots of options to get your library organised the way you want. Worth the subscription! ### 5/5 — My Go-To For Years *2026-06-24, version 10.7.3* I’ve used CLZ Books (and Music) for years. It’s the simplest way I’ve found to keep track of my collections. The camera driven ISBN scanner is brilliant. And in the rare case it doesn’t find the book I’m adding, the manual entry method is easy to use as well. Don’t let ‘simple’ put you off though. The app allows you to filter as many ways as you can imagine. Its ability to track books series is excellent and extremely useful for me. Highly recommended. ### 5/5 — Smooth Transition From Readerware *2026-06-22, version 10.7.3* Just moved about 4000 entries from the now discontinued “Readerware” and the move could not have been easier using the CLZ tool. Effective concept of Core Collection is well considered. More to come as I explore ### 2/5 — Disappointing *2026-06-15, version 10.7.3* Not many of the independent books I have in my library that have isbn numbers are findable and i have to enter the majority of information myself and I cannot include pictures of the book, so it’s a blank cover. Very disappointed. Will start looking for another way to catalog my books. ### 5/5 — Phenomenal Books Database *2026-06-15, version 10.7.3* Over the years, I have used several database applications to catalog my collection of books. CLZ Books has joyfully surpassed each of them. I am completely satisfied with its intuitive look, feel and ease of use. I would highly recommend it to anyone looking to keep track of their personal library. ### 5/5 — Book Lover’s Dream *2026-06-14, version 10.7.3* I love how easy it is to keep track of my TBRS ### 1/5 — Authentication nightmare *2026-06-10, version 10.7.3* “Seems” like a good app. For $20/year, it is clear that is a terrible deal since user account authentication is a train wreck. Search for something like this elsewhere. ## Frequently asked questions about CLZ Books ### What does CLZ Books do? CLZ Books helps you easily catalog your entire book collection. You can add books by scanning ISBN barcodes or searching our online database by author and title. The app automatically retrieves book details, cover art, and even estimated values. ### How do I add books to my collection? You have two main ways to add books. You can scan ISBN barcodes using your device's camera or a USB scanner, or you can search our CLZ Core database by entering the author and title. Both methods are designed for high success rates in finding your books. ### What are the costs associated with CLZ Books? CLZ Books operates on a paid subscription model. It costs US $1.99 per month or US $19.99 per year. A free 7-day trial is available, allowing you to explore all the app's features and online services before committing to a subscription. ### Can I use CLZ Books on multiple devices? Yes, CLZ Books supports syncing your book library across multiple devices. By using CLZ Cloud, you can ensure your collection is always backed up online and accessible from any device you use, keeping your catalog consistent. ### What kind of information can I store about my books? Beyond the automatically retrieved details like title, author, publisher, and plot, you can edit all fields and add personal information. This includes details like the book's condition, its location in your home, purchase date and price, store where it was bought, and personal notes. ## Version history (last 5 releases) ### 11.0.4 — 2026-08-20 Fixed: * Custom Fields: Fixed List/Fixed Button Bar: It wasn't possible to add more than 1 value ### 11.0.3 — 2026-08-18 Fixed: 
 * The “Remove unused pick list items” option could crash the app * Custom Field: Time now supports four-digit hours * Custom Field folders were not remembered after restarting the app * Custom Field Preview was not displayed correctly on smaller phones * The keyboard could not be dismissed when adding or editing a Custom Field * Some users received too many “Please rate this app” popups ### 11.0.2 — 2026-08-05 Fixed: - After updating to v11 books could be duplicated - Main screen: Thumbnail size resets after a restart - Tags containing an '&' could display as '&' after a downsync - Could not dismiss keyboard when adding a Custom Field ### 11.0.1 — 2026-07-21 Version 11.0 is here, with one BIG feature: ** Create your own Custom Fields! ** You can now create your own data fields, such as text fields, number fields, date fields, Yes/No toggles, pick list fields, and much more. All fields you create can be edited on the new Custom Fields tab of the Edit Book screen, and their data will nicely appear in a special section on the book details page. And of course, you can use the fields like any built-in fields, use them as folders, sort on them, etc. ### 10.7.3 — 2026-04-16 Fixed: * Further tweaks to the down-syncing from CLZ Cloud * Book details page accidentally included the "Custom Fields" sections * Add Books, Edit and Action buttons could not be used if images were still downloading in the background ## Apps similar to CLZ Books | App | Rating | Price | Category | | --- | --- | --- | --- | | [iCollect Books: Library List](https://appshunter.io/ios/app/icollect-books-library-list/id476621639) | 4.6 (4,097) | Free | Books | | [BookBuddy Pro: Book Tracker](https://appshunter.io/ios/app/bookbuddy-pro-book-tracker/id395149950) | 4.8 (5,903) | $9.99 | Books | | [BookBuddy: Book Tracker](https://appshunter.io/ios/app/bookbuddy-book-tracker/id395150347) | 4.8 (14,810) | Free | Books | | [My Book List - Library Tracker](https://appshunter.io/ios/app/my-book-list-library-tracker/id443391908) | 4.1 (636) | Free | Books | | [Reading List: Book Tracker](https://appshunter.io/ios/app/reading-list-book-tracker/id1217139955) | 4.8 (29,868) | Free | Books | | [BookScanner Book Leveler App](https://appshunter.io/ios/app/bookscanner-book-leveler-app/id583672052) | 4.8 (12,246) | $39.99 | Books | ## More apps by CLZ - [CLZ Movies collection database](https://appshunter.io/ios/app/clz-movies-collection-database/id314588585) - [CLZ Music CD / Vinyl database](https://appshunter.io/ios/app/clz-music-cd-vinyl-database/id317997093) - [CLZ Games: collection database](https://appshunter.io/ios/app/clz-games-collection-database/id319036253) - [CLZ Comics collection database](https://appshunter.io/ios/app/clz-comics-collection-database/id320501548) - [CLZ Barry - Barcode Scanner](https://appshunter.io/ios/app/clz-barry-barcode-scanner/id452517663) All apps by CLZ: https://appshunter.io/developer/314588588 ## Related topics [library books organize](https://appshunter.io/ios/topics/library-books-organize) · [clz books](https://appshunter.io/ios/topics/clz-books) · [library organizer](https://appshunter.io/ios/topics/library-organizer) · [book genre](https://appshunter.io/ios/topics/book-genre) · [library books scanner](https://appshunter.io/ios/topics/library-books-scanner) · [isbn book manager](https://appshunter.io/ios/topics/isbn-book-manager) · [catalog books](https://appshunter.io/ios/topics/catalog-books) · [level it books](https://appshunter.io/ios/topics/level-it-books) · [book leveler](https://appshunter.io/ios/topics/book-leveler) · [isbn scan](https://appshunter.io/ios/topics/isbn-scan) · [book scanners](https://appshunter.io/ios/topics/book-scanners) · [my library manager](https://appshunter.io/ios/topics/my-library-manager) · [isbn scanner](https://appshunter.io/ios/topics/isbn-scanner) · [book catalog app for collectors](https://appshunter.io/ios/topics/book-catalog-app-for-collectors) · [book catalog](https://appshunter.io/ios/topics/book-catalog) · [book scanner library](https://appshunter.io/ios/topics/book-scanner-library) · [scan books](https://appshunter.io/ios/topics/scan-books) · [book inventory](https://appshunter.io/ios/topics/book-inventory) · [bookscanner book leveler app](https://appshunter.io/ios/topics/bookscanner-book-leveler-app) · [home library catalog](https://appshunter.io/ios/topics/home-library-catalog) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*