Book Database Software
Catalog your book collection
Keep track of your book collection and wish listUse the mobile app or the web-based software (or both!)
Automatic book details and cover imagesJust search our huge online book database by ISBN
Over 40 million ISBNs recognizedGuaranteed 97% success rate on your ISBN searches!
Mobile
Mobile app for your phone or tablet
iOS & Android
iOS & Android

USD $19.95
per year
More about the mobile app
Web
Web-based software for your computer
Windows & macOS
Windows & macOS

USD $39.95
per year
More about the web app
CLZ Books
Mobile + Web
CLZ Books Mobile
1 year
CLZ Books Web
1 year
USD $0.00
USD $0.00
save USD $0.00
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.
Latest software updates
Jun 20, 2025
This app is a game changer!
I was assigned the task of cataloging my father’s library, a retired professor with over 3000 books. I have tried to use other apps and struggled. This app is a game changer and a life saver! It’s so easy to scan multiple items and finds titles quickly, it syncs with my computer, and I was able to create a print out to show my father the list with Book cover images! There is no other app like this one! Thank you for creating this!
Reviews from customers
Jun 25, 2025
Absolutely love this app
Allows me to keep track of my books, which ones I have read, how I rated them, which location in the house I can find it. The team have made some great improvements such as reading the ISBN number when there is no barcode. Well worth the yearly subscription.
Jun 24, 2025
Great organization
I love this program and have used it for over 10 years. it has kept me from buying books more than once multiple times. Great organization, options, features, and really easy to use.
Jun 23, 2025
App very helpful when buying books
This app has saved a fortune by allowing me to check whether I have already bought already.
Jun 23, 2025
Excellent
Best app ever and staff are very helpfull.
Jun 23, 2025
I love this app!
This has helped me keep track of my books and not by doubles it is the best app in the world.
Jun 20, 2025
This app is a game changer!
I was assigned the task of cataloging my father’s library, a retired professor with over 3000 books. I have tried to use other apps and struggled. This app is a game changer and a life saver! It’s so easy to scan multiple items and finds titles quickly, it syncs with my computer, and I was able to create a print out to show my father the list with Book cover images! There is no other app like this one! Thank you for creating this!
Jun 9, 2025
Powerful inventory app
CLZ Books is a powerful inventory app for serious book collectors, offering customizable cataloging, barcode scanning, and cloud backup. The interface is user-friendly, and customer support from the founder and owner Mr.Alwin is top-notch, though advanced features may require some learning.
Rating: 5/5
Recommended for: Dedicated collectors and libraries.
Rating: 5/5
Recommended for: Dedicated collectors and libraries.
Jun 6, 2025
Absolutely love this app
CLZ Books and their Support are awesome.
Jun 6, 2025
ABSOLUTELY AWESOME
I’ve used CLZ books for many years and have approximately 3000 books on my list. I’ve had very few problems over the years but when I have I received almost immediate response. Recently when I tried to open the app on my phone it indicated I needed to subscribe plus it didn’t recognize my login information. I had been syncing my devices regularly but hadn’t noticed that changes weren’t showing on my phone. My iPad was working properly, it was just my phone.
After several back-and-forth emails the technician found, fixed the problem and told me what to do on my end. Both devices are working properly now and synced as soon as I open my phone.
I totally recommend this app, you can’t go wrong.
After several back-and-forth emails the technician found, fixed the problem and told me what to do on my end. Both devices are working properly now and synced as soon as I open my phone.
I totally recommend this app, you can’t go wrong.
May 31, 2025
Great investment
This app is a great investment. Keeps my library cataloged beautifuly.
May 25, 2025
A pleasure to document a library!
The clz team is so thoughtful and helpful, if you have any questions they are available! I have quite a large collection, and this app makes it so so so easy to log everything. their database is extensive, and the isbn scanner is magical! im so happy this app exists, I can stop buying doubles (sometimes triples) by searching my collection before I buy a book! its been so cool to see my collection grow!
May 24, 2025
Easy to use
Easy to use- my library is now catalogued!
May 23, 2025
CLZ Books
Have used CLZ books for years. Windows 7,10,11 and iPhone/iPad. Excellent App. Essential as a means of keeping a book collection.
Only one thing better than the App. Found minor problem. Reported it. Immediate and effective response. They fixed it. Brilliant
Only one thing better than the App. Found minor problem. Reported it. Immediate and effective response. They fixed it. Brilliant
May 22, 2025
Works great
This will help me keep track of my library at home and keep me from double buying books. :)
May 20, 2025
Excellent App!
Easy interface, excellent support and portable platforms.
May 19, 2025
Great customer service
The best way to catalog my books. Great customer service. I use this and the comics one. Great apps!
May 16, 2025
Easy to use
Great app. I finally have all my books organized! well worth the money. I highly recommend it.
May 11, 2025
Great App
Love the ease of use. Very quickly add your books into multiple platforms.
May 8, 2025
Worth every penny
This app is so awesome! It's worth every penny. I have hundreds of books and I got them all scanned. It's very customizable. Couldn't be happier.
Apr 17, 2025
Love it!
Quick and easy. I use this app to keep track of all my role playing books.
Apr 14, 2025
Easy to use
Just what I needed. Easy to use. Scan the code and add it to your library.
Apr 7, 2025
Have used this app for years
Provides so much information and a snap to add books with scan tool. Great support team. Couldn't get by without this software. Great for preventing me buying books I already own.
Apr 7, 2025
Great
Great application with a very good evolution.
Mar 26, 2025
The best I tried
CLZ Books is the best of several I tried. I have a huge project of entering 60 boxes of books and then offering them for sale. Exporting data to a format I can share with buyers is well done.
Mar 22, 2025
Very happy
Very happy with the app, so easy to use.
Mar 18, 2025
Excellent app
I had used Delicious Library back in the day but this blows that completely away. The functionality is great and the appearance is uncluttered but complete. Very easy to use and responsive developers!
Mar 17, 2025
Fantastic product
I am an avid reader. I needed a way to track what I’ve read, find out what else an author has written, and make a list to go shopping. I also needed an easy way to add books. This app does it all. It has many features and kind, efficient support when needed.
Mar 15, 2025
House Library
I have used this app for a few years now and I still Absolutely love it.
It helps me always know what books I already have in my collections.
It helps me always know what books I already have in my collections.
Mar 12, 2025
Excellent App
What a fantastic app for organising your books, highly recommend.
Mar 6, 2025
C’est top
Merci !