Mobile
Web
icon
CLZ Books Mobile

Try CLZ Books Mobile for free

Easily catalog books
on your phone or tablet

Automatic cover art and book details

Author, title, publisher, publication date, plot, genres, subjects, etc...

Easily add books by ISBN barcode or title

Scan barcodes with built-in camera scanner or search by author and title.

Customize entries with personal details

Location, owner, purchase price/store/date, notes, your rating, etc...

Trustpilot

CLZ Books Mobile features

Screenshot 1
Screenshot 2
Screenshot 3
Screenshot 4
Screenshot 5
Screenshot 6
Screenshot 7
Screenshot 8
Screenshot 9
TWO EASY WAYS TO ADD BOOKS:
  1. scan ISBN barcodes with the built-in camera scanner. Guaranteed 98% success rate.
  2. search 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...

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...

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
CLZ Books
Mobile + Web
CLZ Books Mobile
1 year
+
CLZ Books Web
1 year
USD $0.00
USD $0.00
save USD $0.00
Subscribe

Or... use them both,
as perfect companions!

Both CLZ Books Mobile and CLZ Books Web can be used on their own, as a stand-alone solution. But these tools really come to life when used together, as they are great companions. While away from your computer use CLZ Books Mobile on your phone, then use CLZ Books Web at home, to work on your database on a big screen, with a real keyboard. Of course, you can sync your database between them through our CLZ Cloud solution.

Learn about CLZ Books Web
Starters Manual Let's get you started!
CLZ News Learn what's new
Club CLZ Join our support forum
CLZ Help Center Contact our support team

CLZ Books Mobile Updates

icon v10.5 iOS: Disable book values / Search by ISBN10 Jan 07, 2026 icon v10.5 Android: Smoother navigation / Disable book values / Search by ISBN10 Jan 06, 2026 icon v10.4: “One-by-One” mode for adding books by ISBN Nov 14, 2025 icon v10.3: Automatic eBay search links Oct 24, 2025 icon v10.2: Automatic book values and retail prices Apr 07, 2025
More updates
Feb 13, 2026
Just What I Needed
Easily catalogue your book collection with a large number of categories to record all relevant information. Makes for easy referencing when your book hunting to not only know if you already have a book but also whether your copy has all the same features.
GradyB58 (USA) on CLZ Books Mobile

CLZ Books reviews from customers

Feb 13, 2026
Easy to use for all your cataloging and sales needs
I have been using CLZ Books for nearly twenty years and have never felt the need to look for an alternative database. Easy to use, with many useful features for the bibliophile and avid reader alike. Also useful if selling books is your side hustle, tracking previous and current values, stock numbers and whether a book has been in your inventory before. I recommend Collectorz Books highly.
The Great Panjandrum (Australia) on CLZ Books Mobile
Feb 13, 2026
Just What I Needed
Easily catalogue your book collection with a large number of categories to record all relevant information. Makes for easy referencing when your book hunting to not only know if you already have a book but also whether your copy has all the same features.
GradyB58 (USA) on CLZ Books Mobile
Feb 10, 2026
CLZ Books - Great
Ik gebruik CLZ Movies en CLZ Books al jarenlang met heel veel genoegen. Movies vanaf 2011 en Books vanaf 2016. De gebruikersvriendelijkheid en ondersteuning is in al die jaren op een zeer hoog peil gebleven. Alwin en zijn medewerkers reageren altijd heel erg snel. Wat erg te waarderen is dat er binnen CLZ altijd goed geluisterd wordt naar de gebruikers. Dat betekent dat er zinvolle updates en modificaties worden verwerkt. Steeds met dat luisterend oor naar de gebruikers.
Fred van Carla en Julia (Netherlands) on CLZ Books Mobile
Feb 10, 2026
Highly recommended !
This app organizes your books, very well done easy to use, set up no problems! Makes your library even more enjoyable.
Books II (USA) on CLZ Books Mobile
Feb 7, 2026
Excellent
I am using this to catalogue my late father’s library. Its database of books and its ability to search against ISBN are vital tools. I would be lost without it. The support staff are very responsive and the one time I needed them quickly resolved the issue.
Amaczero (United Kingdom) on CLZ Books Mobile
Feb 7, 2026
12 years later I am still happy!
The mobile app accesory to Collectorz excellent book organizing database system. Tracks your Ebooks, too. Collectorz offers a complete suite of custom databases to help you organize your life. They are constantly improving their product and offer customer service and support that many other companies can only dream of. You may be able to find cheaper or even free aps that claim to do much of what Collectorz offers, but you won't find better value anywhere.
Brian J Munro on CLZ Books Mobile
Feb 7, 2026
Just excellent!
I’ve been using CLZ Books for years across iOS, macOS and the web, and it remains the best book cataloguing app available. It’s regularly updated, well-supported, and continues to improve with every release. Absolutely top-notch—highly recommended!
Ankhefenkhons (United Kingdom) on CLZ Books Mobile
Feb 1, 2026
Great App
I’ve used this app for years! Very easy to add books and customize entries. On the rare occasion that I have had to reach out to Support the response has been prompt and very helpful. Love this app!
BooksNTea79 (USA) on CLZ Books Mobile
Feb 1, 2026
Great app
I have been using CLZ Music for some years and have found it very useful. Now CLZ books seems just as good. I have several hundred (maybe a thousand?) books. Scanning bar codes or entering ISBN numbers makes entries easy. For some old books you need to enter the details manually and can photograph the cover to complete the entry. Details about the book and your opinion or whether it is in your ‘waiting to read queue’ can also be entered. Great app!
MJOZW (Australia) on CLZ Books Mobile
Jan 29, 2026
Two decades of excellence
I’ve been using versions of this software for twenty years and it has just kept getting better. The developers never rest on their laurels but keep finding ways to tweak and add to the software in genuinely helpful ways. I have more than 6000 books in my collection and the software is quick and efficient both for sorting and for locating specific books.
eeedge (USA) on CLZ Books Mobile
Read more reviews