CLZ Books - library organizer

CLZ

In-app purchases

About this app

Easily catalog your book collection. Automatic book details, book values and cover art.
Just scan ISBN barcodes or search CLZ Core 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!

TWO EASY WAYS TO ADD BOOKS:
1. Search our CLZ Core by ISBN:
You can either scan ISBN barcodes, ISBN numbers using OCR or use a USB barcode scanner
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, etc..

EDIT ALL FIELDS:
You can even edit the 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!). Also, add personal details like condition, location, purchase date / price / store, notes, etc..

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...

FULL 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...

USE 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.

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

ABOUT COLLECTORZ / 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.

CLZ USERS ABOUT CLZ BOOKS:

"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)

"This is THE ONE. I have a lot of books, and I have been looking for a very long time for a great library cataloging app. A friend of mine showed me this one and… Yes. This is it. So easy to use, so easy to add books and create collections, add covers, anything you want to do. I love it I love it I love it.
Also Customer Service is absolutely terrific."
OolooKitty

"I first gave 5 stars to this in 2018. In 2024, it still delights. If I could give more I still would now. Such a useful book database app which is constantly being improved.
I have had occasion to contact them a couple of times and they have always been courteous, friendly and immediately helpful. I can thoroughly recommend."
Mark Maffey

Ratings and reviews

Great tool for book lovers whom have a collection of books! January 2026, will be my 1 year anniversary of having this app. Favorite points: Easy to use. Organized how I want it. You can take pictures of, the front cover, back cover, and side binding, for the visual memory of the book, instead of only seeing a title. Wish list: I wish the book shelf visual was in the app, with more choices of visuals and color personalization. I wish to synch all of my digital books; Play books, Kindle,Audible.

This is an amazing app for tracking a library or adding books. I have a library of 2000 books and it transferred very easily...and I am not too good at that stuff. However, the app has been wonderful for not only me, but my family uses it as well. I had my library uploaded to it in about 25 mins and cleaned up quite a bit. I highly recommend this app. It is very functional!

1st. it's a great database and it's only gotten better over the years with beautiful synchronicity between your phone and their cloud-based service. I love that it tells you the estimated value of some books, not that we collect for that reason. but it's fun. 2, they have fantastic support, because let's just say, hypothetically. some idiot manages to erase his entire database, they are there with a cheerful and clear solution. I'm so grateful. I mean if that ever happened I would be grateful!

What’s new

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