About CLZ Books - library organizer
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,...
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)
Previous Versions
Here you can find the changelog of CLZ Books - library organizer since it was posted on our website on 2014-03-04 23:59:23.
The latest version is 11.2.1 and it was updated on 2026-10-10 23:35:04. See below the changes in each version.
CLZ Books - library organizer version 11.2.1
Updated At: 2026-09-25
Changes: Big update today: Add your own extra images to books! Check it out:
* Add up to 5 extra images per book entry
* Set a Description and Image Type per image
* Crop, rotate images and drag them to re-order
* Extra images will appear in the details at the bottom
* Tap to enlarge and then swipe to browse through all images
On top of that we also added:
* New folder options for Has Front, Has Back and Image Type
* A fresh look for the tabs in the Edit Screen
CLZ Books - library organizer version 11.1.3
Updated At: 2026-08-24
Changes: Fixed:
* Updating from Core could freeze the app
* After tapping a suggestion from the search in main screen, using Back would make the app go back to the top of the list
* A couple of layouts for foldable devices weren't displayed correctly when using 3-button navigation
* Update from Core: some books were erroneously reported as updated
CLZ Books - library organizer version 11.0.3
Updated At: 2026-07-22
Changes: Fixed:
• Sorting: Fixed a crash that occurred when sorting your collection by LoC or Dewey classification, especially when some books were missing these values.
CLZ Books - library organizer version 10.7.2
Updated At: 2026-05-05
Changes: Fixed:
* Sync with CLZ Cloud: Updates: Custom covers did not download correctly
* Sync screen could open when tapping Edit during image downloads
* Details view not fully visible in some cases
* "Downloading images" bar could appear when nothing was downloading
* Book template: eye icon showed as "Not Read" incorrectly with 1 read event
CLZ Books - library organizer version 10.7.1
Updated At: 2026-03-30
Changes: Faster down-syncing from CLZ Cloud:
* Syncing now down-syncs the *data* first, while queuing the *image* downloads. This makes the data sync super fast.
* Downloading the images is much quicker too, especially on fast connections, as it downloads multiple images at the same time.
* As soon as the data download has completed, you can close the Sync screen and start using the app. The image downloads will continue at the bottom of the main screen, prioritising images that are "in view".
CLZ Books - library organizer version 10.6.1
Updated At: 2026-02-24
Changes: CLZ Books v10.6 is here! Bringing many new fields (including the big one: Reading History)!
New:
* Track your Reading History, with multiple read sessions, each having Start and End Dates, Reading Status, Reading Progress and Reader fields
* More book dimension fields: Spine Thickness and Weight, delivered automatically from Core!
* New field: Dust Cover Condition
* New field: Place of Publication and Original Place of Publication
CLZ Books - library organizer version 10.5.2
Updated At: 2026-01-14
Changes: Fixed:
* Scrolling lists / tapping buttons / selecting items in a list / removing items could suddenly stop working
* Covers stayed zoomed in if you navigated out of an item and into another
* Edit screen: Taking a picture for your cover could sometimes remove all other information from that item
* Selecting: Tapping "Select All" in didn't show items being selected in images view
CLZ Books - library organizer version 10.5.1
Updated At: 2026-01-06
Changes: New:
* Faster 'snappier' navigation in the main screen (going from folder to folder, back to list/images/card view, going to and back out of viewing details) and smooth animations when doing so
* Settings: Download values from Core: you can now disable downloading of values. This will also remove all values you already have from Core
* Searching ISBN10/ISBN13 in your own collection will now find it, no matter if you have ISBN10 or ISBN13 filled in for it
Fixed:
* A couple of navigation issues
CLZ Books - library organizer version 10.4.1
Updated At: 2025-11-13
Changes: New "One-by-One" mode for adding books by scanning ISBNs:
Up till now, adding by ISBN always used a "queue":
Scan barcodes to add books to a queue, then add em all in one go. Quick and efficient.
Today, we are adding a "One-by-One" mode, *without* a queue:
Scan a barcode, the book details are shown, tap Add, and instantly return to the camera screen to scan the next one. Clear and easy.
Switch between the two modes using the queue icon at the bottom right of the camera screen.
CLZ Books - library organizer version 10.3.2
Updated At: 2025-10-28
Changes: Fixed:
- Details: The data at the bottom could be hidden behind the navigation buttons
