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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

Reviews from customers

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
August 28, 2017
Thanks For Adding AutoCorrect Options In The New Update
This app just gets better and better. Thanks so much for adding the new auto correct options that were added in the latest update. This is a game changer for me because I keep so many book notes. Now it is so much faster to type notes and to add more plot summaries and etc. to my entries. Hopefully you will add this update to other CLZ apps such as comic CLZ and Movie CLZ because I keep many notes in those programs too.
I highly recommend this app to anyone who is a big collector. It is probably the best out there. It's definitely the best one that I have seen so far and I've tried a few. The staff in customer support is also very friendly and always working to improve services. — RonP1979 on CLZ Books
August 28, 2017
I also have the full version of the book database it is fabulous as I love books and also music which I also have a full version, I also have movies data base as I Have a huge collection of DVD, the databases are amazing they help keep my life organized. — Marion Morella (Australia) on Book Collector
August 25, 2017
Book collection
I also have just started on this giant task, but thanks to Collectorz, I can finally come to grips with our book collection. — Mary Corrado (USA) on Book Collector
August 21, 2017
Love it
The best program for those with big book collections. — Andrea Hoo Chempinski on CLZ Books
August 20, 2017
Really handy
Best cataloging app I've used so far. — Matthew Baker on CLZ Books
August 19, 2017
Great app
Great app for keeping track of my book collection. — David Rose on CLZ Books
August 19, 2017
Been using it for 4 years and is lovely
Like some people here I had problems with the 100 limit. Please do a little work before you start putting down this app. I went to the developer website and email them. Because of the many changes things like connectivities to my App has gone a bit south. You don't have to buy it again!! Just email them and they will take care of you. I had to do a screen shot of my purchase and send it to them. My APP was working within minutes. I bought my APP 4 years ago and I had never have to buy it again. They will help you. Try them. : ) — Makora One on CLZ Books
August 16, 2017
It does exactly what I need with no fuss! — A Google user on CLZ Books
August 13, 2017
Great app
Good so far. — A Google user on CLZ Books
August 12, 2017
I use book collector, 12 years now, great. — Toby Schwartzburg (USA) on Book Collector
August 12, 2017
CLZ Books
Beats doing dewey decimal by hand. — Ted Swanson on CLZ Books

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