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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

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
March 30, 2020
Thank you
I am a avid reader. I have lots of applications on my computer, but I have to comment you have a very well written program. You are consistently updating and improving. — Gene (USA) on Book Collector
March 30, 2020
Gran aplicación
Es una gran aplicación, vale la pena pagar por ella. — Jordi Funes on CLZ Books
March 28, 2020
CLZ Books
Op zaterdag een probleempje gemeld, en vandaag samen met de support desk dit probleempje opgelost. Top zelfs in het weekend actief. — f2hfa on CLZ Books
March 27, 2020
Great bit of software
I can't believe how fast the new cloud sync is. That's a great step forward. Shortly before I did a sync with 364 changes and it took ages. Now they happen in a blink. Great work to the team.
This is a great bit of software that just keeps on getting better. — Mal Ferguson (Australia) on Book Collector
March 23, 2020
Shelves view is great!
The shelves view is great, and I like how easy it is to see the books by author. This is so much more user friendly, and pleasant to work with. So thanks to you, and your team. — Jackie B (Cyprus) on Book Collector
March 22, 2020
Loving this app
Loving this app already after two days; will definitely be buying the year subscription! — Mary Brookins on CLZ Books
March 20, 2020
No more duplicates
Ideal for documenting my collection in the event of a disaster. Keeps me from buying duplicates. As I enter items, I find books I forgot I had. Loving this! Very great customer service! — Sandra Malek on CLZ Books
March 20, 2020
Die beste app
Die beste App, allerdings alles andere als günstig. Wer aber wirklich sammelt oder einen umfassenden Überblick haben möchte, dem sei diese Ausgabe empfohlen. — Andreas Howering on CLZ Books
March 20, 2020
Amazing app, very easy to use. Huge database, even my weirdest books were in there, and mine as mostly portuguese editions. Also excellent support service!!! Very efficient and quick to reply. Truly recommend the app. — dolcefareniente on CLZ Books
March 17, 2020
Great App / Great Support
I have all the CLZ apps and accompanying PC programming, and have had some for approximately ten years, and love them. I recently had a minor issue with the CLZ Book app, but customer support cleared it up very quickly. Highly recommended for collections big and small. — Red00Knight on CLZ Books
March 17, 2020
Great app just learning it but it awesome so far. — Refuse Wheels on CLZ Books
March 16, 2020
CLZ Big Help
I’m able to access my book collection of almost 6000 volumes regardless of where I happen to be. Thanks to CLZ, there are many times that I’ve avoided buying a duplicate of a book I already have in my collection. — fladesND on CLZ Books
March 16, 2020
Great app with related eco-system!
Using this app, the web based Book Connect as well as the companion CLZ Barry (barcode scanning) I have documented over a 1400 books for my father’s estate. It worked fantastically well! With the collectorz software we were able to keep the books we wanted and sell the rest creating the needed lists and views of the books. Can highly recommend this app and the rest of the collectors software! For entering a bulk number of books with ISBN the CLZ Berry + web based Book Connect works best, but to quickly get an overview and find a book this app is great! — MartinViking on CLZ Books
March 15, 2020
Quick and easy
So far it's really good, working with ease and I can organise quick and easy and have different categories to how I want it. — Michelle D on CLZ Books
March 15, 2020
CLZ Books
Molto semplice da utilizzare e completa. — Alessandro Alberghini on CLZ Books
March 14, 2020
No more duplicate books
Just wanted to thank you for all you do. I ran to the used book store yesterday to stock up in case we have to stay home for awhile. Your app allowed me to buy books for my husband and be sure he didn't already have them. — Debbie Kristensen (USA) on CLZ Books
March 12, 2020
Super useful
Super useful to have my book list handy to make sure I don't buy duplicate books when shopping. ;) — Craig Forbes on CLZ Books
March 07, 2020
Love the CLZ Books app
I love the CLZ Books app (almost as much as the CLZ Comics App) and will continue to use it (have actually just recommended it to another person), and I'm very impressed with your customer service. — Brandt Gibson (USA) on CLZ Books
March 01, 2020
Piece of gold
Your software is a piece of gold, and I’m anxious to get back to using it. — Patricia Carr (USA) on Book Collector
February 29, 2020
User since 2014
I’ve been collecting books my entire life and always wanted a library database like my local library. However, despite my best efforts, cataloging everything in excel and FileMaker Pro took forever and lacked the functionality I craved. I joined the Navy, and while I was in boot camp, my house burned down. My books were in the basement, and were destroyed by the water used to put out the fire. My family looked for a way to easily track my books for insurance purposes, and they found this app. This app answered both their needs and my needs. As I worked to rebuild my library, I kept buying duplicate books since I had a hard time differentiating the books I had lost from the books I had repurchased in my mind. I am now back over 6000 books and counting and I rely heavily on this app as well as the desktop version to keep track of my library. Sure, the core doesn’t have the most accurate or cleaned up data available and many plots are missing, but that allows us the take the data provided and make it our own. It’s a pity they had to change to a subscription service, because whenever I go to book stores or sales, I’m always suggesting CLZ products to my fellow patrons.
The barcode scanner saves me tons of time. — Hale.Yeah on CLZ Books
February 21, 2020
Great program. — A Google user on CLZ Books
February 18, 2020
Greatest software for book lovers
Began with CLZ over 4 years ago. Took time to load in my library, but since then adding new books has been very simple. Updates are frequent and each one has been useful. I love keeping my book lists up to date and especially appreciate not buying duplicates anymore! — halftracker on CLZ Books
February 15, 2020
Excellent et très bonne évolution, continuez. — Michel Vaucher on CLZ Books
February 14, 2020
Fantastic software! Thanks Alwin! — Philippe Mollard on CLZ Books
February 14, 2020
Great product!
I have about 3500 books and cannot remember where they all are. After searching extensively for a REASONABLY PRICED product to use to catalogue my library, a friend who is a librarian told me about CLZ. Wonderful! Don’t use it every day, but it is invaluable when I do. — Preachean on CLZ Books
February 13, 2020
Love the app
I use it to keep track of the books i have read, so i know what to read next. — candy dugdale on CLZ Books
February 12, 2020
Amazing !!!!!
One of the best apps for readers. Use it extensively. And it feels good to have this so that you know what books you have and also if you want to loan your book to someone, you can do that too. — Abdulla Yasser on CLZ Books
February 09, 2020
CLZ Books
L'ho appena installata e le impressioni sono buone. Il loro ottimo servizio di assistenza mi ha suggerito un metodo efficace per importare a costo zero oltre 3800 record da un file .cvs! — Enea Cavallo on CLZ Books
February 08, 2020
Personal library
Detailed organization for my personal library of thousands of books. — Renee Plouff on CLZ Books

Read more reviews from customers