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Book Database Software - catalog your book collection

Keep track of your book collection and wish listMobile app, web-app or downloadable? Your choice!
Automatic book details and cover imagesJust search our huge online book database by ISBN

Mobile app

Mobile app for iOS & Android

  • Fast and slick mobile app
  • Install on multiple phones/tablets
  • All data stored on your device
  • Sync data to CLZ Cloud (optional)
  • Built-in camera barcode scanner


Downloadable software

  • Downloadable desktop software
  • Install on one PC or Mac
  • All data stored on your computer
  • Sync data to CLZ Cloud (optional)
  • Free CLZ Barry barcode scanner app


Web-based software

  • State-of-the-art online software
  • Login and use from any computer
  • All data stored in the CLZ Cloud
  • Automatic updates & backups
  • Free CLZ Barry barcode scanner app

Buy them together and get a discount

CLZ Books
1 year
Book Collector
1 year
Book Connect
1 year
USD $0.00
USD $0.00
save USD $0.00

Use the free CLZ Cloud service to:

  • Synchronize your book database between the desktop software, mobile apps and the Connect web-app.
  • View your list online and share it with friends and family.
  • Always have an online backup of your book database.

Latest software updates

Having to stay home has given me the opportunity to organize and catalog my library of 1200+ books! All entered into the book on-line software and are now organized by author and title! — Denise Askea (USA) on April 02, 2020

Reviews from customers

June 01, 2020
Wonderful application
I’ve been taking the last 8 weeks of isolation to update my book database and want to express my many thanks to the developers and the customer service team. CLZ Books is a wonderful application. — Paul Morrow (USA) on CLZ Books
May 30, 2020
Great tracker
Great for keeping track of the books I can't stop buying. — Andy Woodward on CLZ Books
May 29, 2020
Have been wanting to inventory my 100's of books for years....So easy to use, and customer support through email almost immediate and helpful. SO WORTH THE SNNUAL FEE!!!!!! Easy to use, nice graphical display if boik covers...live it. — RKay Kitchens on CLZ Books
May 29, 2020
No more duplicates
I love being able to shop at any bookstore and not buy something I already own! — Janet Gahagan on CLZ Books
May 23, 2020
Can’t believe how well this works
I have a collection of train books (100+) that I have needed to catalog for years. I was dreading using something like Excel to do this. Not real proficient with this software yet, but it is amazing the authors and titles that pop up. Train books are a real subset of literature, but you guys seem to have a lot of it covered.
Completed 2 shelves of books in about 20 minutes while learning how to use the program. Now I have documentation if I need it for insurance. — C on CLZ Books
May 16, 2020
Super intuitive and fast
This app is extremely easy to use and has lots of very smart features. I was able to start building my collection in seconds! — XLargeBoy on CLZ Books
May 08, 2020
Very handy
A great tool for tracking your books. I'm looking forward to having time to catalogue our CDs and records. — Glenn Murray on CLZ Books
May 07, 2020
Fast app
Outstandingly good. — Glenn Knight on CLZ Books
May 02, 2020
No more duplicates
Finally have a way to keep track of all my books and no more duplicate buying when out shopping! — Candace Buyuklu on CLZ Books
May 02, 2020
Works like it should. Pleased with purchase. — david buss on CLZ Books
April 30, 2020
Thank you!
Hey everyone at CLZ, just wanted to say thank you for making ‘Extras’ from the desktop edition a part of the web edition. This is where I was keeping info like if it was signed. I would get a list of books from a bookseller and some of them would be sighned. I knew I already had some of the books but I couldn’t remember if they were signed. I would have to wait until I was home to see if my book was signed or not. Now I can see this info from anywhere! Thank you! — Sherri Reid (USA) on Book Collector
April 30, 2020
Invaluable app
Would not be without it. Invaluable when choosing books in library. — Stuart Ogg on CLZ Books
April 30, 2020
Excellent support
Program works as described. The support is excellent: fast, responsive, and thorough. I had a tricky problem related to my phone setup and they stuck with me through many emails to get it right. — David charlton on CLZ Books
April 26, 2020
Worth it
Very good service for cataloging items. Many sorting & customization options. Worth the yearly cost. — Stephen Owens on CLZ Books
April 26, 2020
Love how easy it is to input books! — Tina Stine on CLZ Books
April 24, 2020
Great product!
Great service, and great product! — Anthony (USA) on Book Collector
April 23, 2020
The BEST book cataloging software
I have used many book cataloging softwares ( including Library Thing). Book Collectorz is the best because:
1. It never, ever, ever, ever hangs
2. Customer support is top class
3. Deeply customisable
4. Available and syncs across all platforms
5. Very fast
6. Includes the 'Book Lending' feature
7. Very low cost for such a feature rich and solid software. — Param96 on CLZ Books
April 23, 2020
Excellent Support
I’ve been using CLZ Books for a long time and never need support because the app is intuitive but recently I ran into a issue that was unique. CLZ support quickly got back to me, we worked through the issue and successfully fixed it. I give CLZ Books top notch for easy of use, functionality, comprehensive database and excellent support. — gar71 on CLZ Books
April 22, 2020
Worth every penny. — C. B. Bergin on CLZ Books
April 21, 2020
Love this app
Needed an app to inventory my books for insurances purposes. Looked around and this one seemed easy to use. Was well worth purchasing, use it almost daily and so easy to use. Love that you can put comments, etc! — angeliquedes on CLZ Books
April 20, 2020
Fantastic App
Could not ask for a better service. — Alex Schomer on CLZ Books
April 16, 2020
My book collection cataloged
With the help of my 5 cats, taking turns in my lap supervising, I've been able to finally get ALL of my book collection cataloged. Thanks so much for all you folks have done for this. — Tina Deaton (USA) on Book Collector
April 13, 2020
Library of about 5,000 books
I have a library of about 5,000 books. Book Collectorz is fast, reliable, flexible, and well-supported (including regular updates). I have used it for 10+ years. Five Bright, Shining Stars. — Sterling Sunley on CLZ Books
April 13, 2020
I don't know when I had more fun, reading a book or entering them into this program. It was effortless. Seeing the synopsis that appeared refreshed my memory what the book was about. Highly recommend it. — Marcia Zientek on CLZ Books
April 11, 2020
Ottima app
Ottima app, la conoscevo come programma desktop. — Stefano Lariccia on CLZ Books
April 10, 2020
Avevo chiesto come mai non riuscissi a operare dal mio iPhone ma solo dall’iPad! La risposta è stata immediata ed il suggerimento efficace! Grazie per l’efficienza. — sandaus on CLZ Books
April 09, 2020
Superb software
By being stuck indoors I’ve been able to re-catalogue one of my libraries. Unfortunately we don’t have space for shelves so have to use boxes. Just hope I don’t need something from the bottom box. Thank you for the superb software which made the job a whole lot easier. — ?Peter Clarance Joyce (United Kingdom) on Book Collector
April 07, 2020
CLZ Book
This app is very good for categorizing your books. Easy to use!! And if you need help, the people at support is helpful and quick to solve the problem. I can recommend this app!! — Marit 56 on CLZ Books
April 05, 2020
Works like a charm
4500 books and growing my inventory. Works like a charm, easy to use. Almost 2 years later, still very satisfied with Book Collector. Now managing over 25,000 books via using both desktop and Android versions. Work well together, application is updated regularly.
Support is great, have issues? They will respond pretty quickly and help you with the problem. Staff responds well to suggestions and questions and have helped me quite often. — A Google user on CLZ Books
April 02, 2020
Love collectorz!
Having to stay home has given me the opportunity to organize and catalog my library of 1200+ books! All entered into the book on-line software and are now organized by author and title! — Denise Askea (USA) on Book Collector

Read more reviews from customers