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Book Database Software - catalog your book collection

Automatically download book details and imagesLike author, title, publisher, genres, subjects & cover art.
Just search our huge online book database ... ... by ISBN or by author & title.

3 home library solutions - mobile app, web-app or desktop software:

Feature comparison

The mobile solution :

  • Mobile app for iOS or Android.
  • Built-in barcode scanner.
  • All data stored on your device.
  • Optional cloud storage (free).

The easiest solution :

USD $2.50

The most advanced solution :


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.

Free CLZ Barry barcode scanner app

  • Scan barcodes with the camera of your phone or tablet.
  • Instantly send the scanned barcodes to the Book Collector or Book Connect software on your desktop computer.
  • Download CLZ Barry from the App Store / Play Store.

Latest software updates

I have this software for my 800+ books. A great way to always have my list with me, to prevent the occasional "double purchase" of a book. I recommend to you for your library. — Thomas L Hiegel (USA) on August 29, 2017

Reviews from customers

October 11, 2017
Wonderful!!! All my books are now in my CLZ app!!! Alwin, I cannot thank you enough. I am so grateful for all your help, all your patience. I could not have done this correctly without you. You made it so easy. You are a book angel! You and CLZ gave me the tools and the aid to accomplish that rescue mission. I am so happy. I will sing praises of CLZ to all my bookish friends!
It is poetry in motion! All my titles are tumbling down into my app! Marvelous! It took me weeks to enter all these books last year. I LOVE CLZ! — Mary Erler on CLZ Books
October 11, 2017
Excellent software
This is excellent software. Thank you to all of the Collectorz staff for developing and maintaining the product. — Dave Nash (USA) on Book Collector
October 03, 2017
Love this application
Bought the permanent app about a day after 'playing' with the startup offer. Gradually going through the some 1500 (?) books I have and cataloguing them. Good work for the winter if it is particualarly snowy this year:) — Rick Jones (USA) on Book Collector
September 27, 2017
The barcode scanner is excellent
The perfect companion to the main PC version. The ability to add books direct from the app using the barcode scanner is excellent. I've been using the Collectorz apps for years and will continue to do so. — Andy Turner on CLZ Books
September 27, 2017
Keep track of my books
This app let's me keep track of books better than any other app or software that I know of. — Wyatt Kiefling on CLZ Books
September 24, 2017
Love it
So far I love it but I have only been using it for a few hours. — Rachel Adams on CLZ Books
September 18, 2017
No more duplicates
Actually saved me money by letting me know what I already have. — James Sparkman on CLZ Books
September 15, 2017
Definitely The Best
I've used for a number of years, both the iOS and Windows versions. I can't imagine using or needing any other. I use Clz Books daily. Movies, Music and Games less frequently. Rarely do I come across a book not in their database. Then, only older and usually only in a specialized subject. — Garyv40 on CLZ Books
September 13, 2017
Like it
I really like this app a lot. — Daniel Dowdle on CLZ Books
September 11, 2017
Best app of its kind
Very nice app, one of the best in the field. Like the syncing option, so I can use it on several devices, even cross OS! — A Google user on CLZ Books
September 09, 2017
Great app
The works Buy it. — Drklaasen on CLZ Books
September 08, 2017
Great database lookup
Great database lookup and super entering when bar codes are read. — Gregory Rowe on CLZ Books
September 06, 2017
Very helpful
So far this application very helpful for my personal library, hope I can use for my church library. — Darius Mangamba on CLZ Books
September 06, 2017
I Can't Imagine Better
This app is a robust, easy to use, companion to the desktop version of this book cataloging database. The support is excellent. Moreover, the communications with the firm's leadership are friendly, evidencing that the entire team likes what they are doing. — Bernie of Ohio on CLZ Books
September 05, 2017
Lots of Books
I am an avid reader (A ok a week)?and this app really helps me keep a record of what I have already read and add to be read to my wish list. — Rethgualsthefirst on CLZ Books
September 02, 2017
Love your product!!!
That solution worked perfectly!! Thank you for your help and expertise. I was afraid I lost my books and work and you really came through for me. Thanks again and have a great weekend!!!! — Robert Mark (USA) on Book Collector
September 02, 2017
Great system
One of the best cataloguing system. — Vicente Jorge Arboleya Comas on CLZ Books
September 01, 2017
Prático e eficiente
Ótima forma de acessar seu acervo de livros. Busca em bases on-line e leitura de código de barras facilita muito o cadastro. — Silvio.de.Paula on CLZ Books
August 29, 2017
Love it
Use it and love it. Finally have my collection catalogued after years of putting it off. — Rod Mollise (USA) on Book Collector
August 29, 2017
Always have my list with me
I have this software for my 800+ books. A great way to always have my list with me, to prevent the occasional "double purchase" of a book. I recommend to you for your library. — Thomas L Hiegel (USA) on Book Collector

Read more reviews from customers