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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
Over 40 million ISBNs recognizedGuaranteed 97% success rate on your ISBN searches!
For your phone
  • Available for iOS and Android
  • Built-in camera barcode scanner
  • Sync data with the Movie Connect software
For your computer
  • For Windows, macOS, Linux, chromeOS, etc.
  • Use with the free CLZ Barry barcode scanner app
  • Sync data with the CLZ Movies mobile app

Or... use them both, as perfect companions!

Both CLZ Books and Book Connect 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 on your phone, then use Book Connect 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.

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

Also still available: Book Collector for Windows

Book Collector is our legacy desktop software. Old-skool software that you install on your own computer, with your data stored locally.
Using Book Collector is only recommended for advanced Windows users, who know how to install/update software, manage folder and file permissions, configure firewall/security software, make their own backups, etc...

Learn more about Book Collector

Latest software updates

It is easy to use, personalise and to tailor to one's requirements. All interactions with the software are simple, efficient and at super-quick speed. Any queries are answered in detail within minutes or hours by the friendly and helpful (human) support team.
This app has been designed by people who know clearly what they are doing, are experts in their field, and who care about how the app responds and delivers.
— 39me (United Kingdom) on February 09, 2024

Reviews from customers

February 14, 2024
Highly recommended
I'm been using this app for a few years now. I can't begin to tell you how pleased I've been with both it's performance and completeness. If you have books, movies, and music to keep track of I highly recommend this app. — Longhorn on CLZ Books
February 13, 2024
Great at organizing my books! — Ladena Koch on CLZ Books
February 09, 2024
If you collect books, you need this app
It is easy to use, personalise and to tailor to one's requirements. All interactions with the software are simple, efficient and at super-quick speed. Any queries are answered in detail within minutes or hours by the friendly and helpful (human) support team.
This app has been designed by people who know clearly what they are doing, are experts in their field, and who care about how the app responds and delivers. — 39me (United Kingdom) on CLZ Books
January 31, 2024
Works awesome! — Geoff King on CLZ Books
January 31, 2024
Very useful
Very useful to have my list with me when browsing in a book store. — Richard King on CLZ Books
January 18, 2024
It's good
Best for what it is. Could use a little more organization/refining for vintage books and different editions of the same book. But I have to update a whole lot less than comparable apps. — Fuz Umthin on CLZ Books
January 12, 2024
As advertised
Thank you for allowing me to spin the pie chart at the bottom of the statistics page - 10/10 app, does as advertised, my only suggestion would be to add a more satisfying beep sound when you scan an isbn:) — Repulsive__ (Australia) on CLZ Books
December 26, 2023
Great for checking what I have
I've been using book collectorz for over 20 years. Having it synced to my phone is great for checking what I have when searching second hand stores. — Ian Piddington on CLZ Books
December 17, 2023
10/10 great app
The ability to organise and collate for book lovers and the most organised of people. Quick to set up, easy to add books, and navigate. Random book selection a great addition to make choosing the next read simple if you can’t decide.
Subscription is more than worth the money for a very low £12.99 annually considering the amount of work that must going into the app. — Golfgal1027 (United Kingdom) on CLZ Books
December 16, 2023
So helpful. Negates duplicate purchases. — Hez Dun on CLZ Books
December 14, 2023
Great app for any book collector. — Nickolas Rudolph on CLZ Books
December 14, 2023
The best
The app is easy to use and to navigate. — morse1001 on CLZ Books
December 01, 2023
EXCELLENT customer support
Great app, EXCELLENT customer support, been using 3 Collectorz apps for years! — John on CLZ Books
November 27, 2023
Your customer service is great
I appreciate good “after-sales” service and an excellent product. It is, after all, this that I tried to provide when I was managing my company. You probably know the adage that getting to number one is difficult but staying number one is even more difficult. The paradox of excellence i.e., once you have achieved a certain level of “excellence”, a decline is inevitable. This is at least what most experts believe. I made it a goal to prove them wrong.
The reason I write this is because I think that this is the philosophy that you are applying with your company. You are constantly “tweaking” your product – adding features, making it easier and fun to use. I find this commendable and worthy of praise.
As you know, I purchased your product some years ago. At the time, I “evaluated” different databases. I even attempted to create my own but found that yours met all my criteria including being readily affordable. I have not been disappointed. In the coming months, I hope to enter the rest of my book collection. This has become a priority since my wife has criticized me for not being able to locate a book that she asked for and that I know I have. (It is in one of my many bookcases, but it has not been entered in my database yet! The good news is that after hours of searching, I found it. This made me realize that had I entered it, I would have found it immediately and really impressed my wife instead of being chastised. Good customer service will forever remain valuable!)
Since I have books that were purchased before barcodes were introduced, entering these books has been a little more challenging. Should I encounter a particularly difficult situation that I cannot resolve, I will be sure to contact you. I know that help is only an email away.
I wish you continued success which I am sure that you will enjoy as long as you keep doing what you are currently doing. — Michael Mancini (Canada) on Book Collector
November 24, 2023
Excellent support team
After inadvertently deleting my database from my phone, I contacted CLZ and within minutes, they answered me with the solution. It worked and my database is complete again. Thank you so much!! — Willa Hensley (USA) on CLZ Books
November 22, 2023
Ottima applicazione
Ottima applicazione e soprattutto un eccellente servizio di assistenza, rapido, cortese e competente! AGGIORNAMENTO - Sempre meglio! L'ultima release contiene un'utilissima funzione di azzeramento dei campi vuoti nelle Pick lists: era un'osservazione che avevo fatto meno di una settimana fa! Servizio clienti assolutamente fantastico. — Enea Cavallo on CLZ Books
October 30, 2023
The best
The best program for this matter. — Goern Luedtke on CLZ Books
October 26, 2023
Good App
Good app, finds almost all books via the bar code otherwise it can be added manually. Great asset to not buy books twice when your library grows and your cannot memorize each item. — duzbigalo (Germany) on CLZ Books
October 23, 2023
Easy to use
Really easy to use and categorize. — Johannah Caley on CLZ Books
October 02, 2023
You guys have the best program
I wanted to thank all of you for doing such a wonderful job of creating a program that I use for my entire collection of almost 8K books. Every single book I own is in there and I have had multiple sources ask me how I have such an organized collection and I tell them you guys have the best program and incredible customer service. You guys are just a really great company and for someone like me with a disability this helps me organize. — Nelson Fountain (USA) on Book Collector
September 29, 2023
Great software. Fantastic customer service. Almost perfect. — Jutrdghcxdf (USA) on CLZ Books
September 25, 2023
My book collection
I have been using the program to catalogue my book collection for quite a while and only recently decided to print my catalogue. The program worked very well, allowing me to choose the fields I wanted to include. I am very satisfied so far. — Bob G. (Canada) on CLZ Books
September 23, 2023
I absolutely LOVE this app!
I have been wishing for a tool like this ever since made my first book collection database in Excel 20 years ago, and now I have finally found it! It is beautifully designed, it's very intuitive and simple to use, it is easy and quick to add new books, and it has all the functionality you could wish for. It is also easy to personalize so that you only use the functions that you need, you can sort and organize your collection exactly as you please. And I LOVE that it has all the cover photos instead of just long lists of titles. I strongly recommend CLZ Books to all book lovers out there! — Inger-Anne (Norway) on CLZ Books
September 11, 2023
A serious time-saver!
It's a working quite well, thank you! I've managed to catalog over 160 books in just under 2 hours of time. With a collection exceeding 1500 books, this app is a serious time-saver! Out of these books so far, I've only found 3 needed a little extra love or manual attention. The barcode scanning is awesome! — Ron J. on CLZ Books
September 02, 2023
Facilidade em adicionar livros manualmente e por ISBN Facilidade em filtrar livros por qualquer característica. — fernando almeida on CLZ Books
September 01, 2023
Exceptional book database!!
I have used this program for over 4 years now! Works immediately after downloading and networks with the current ISBN database. Responsive customer service is another plus. IMHO it’s the best book cataloguing app out there! — Greg luxist (USA) on CLZ Books
August 21, 2023
Very useful
I've started the trial for the cloud version and the desktop version to see which I prefer. I might end up using the cloud version but still keeping the app on my phone as well as it's just more user friendly when in a book shop to open and check my library list.
Honestly out of all the apps I've used this one has been the easiest to get used to, add books to and navigate. As I've now gotten too many books that fit in my apartment I've found that it will be very useful to keep catalogues of what's in storage, what's in the apartment and what I keep at my office and lend out. — Monique Gomez (Australia) on Book Collector
August 14, 2023
Wonderful product
I'm delighted with both Book Connect and now CLZ Books. Initial setup worked well.
I've entered almost 3,500 books in the database, with about 500 more remaining. Collected over more than 60 years.
Thank you for producing, maintaining, and constantly improving such a wonderful product. — Les Bergen (USA) on Book Collector
August 01, 2023
La uso da anni con piena soddisfazione. Consigliabilissima anche assieme alla versione desktop. — Raffaele Petralli on CLZ Books
July 31, 2023
Easy to use, easy to add to, fantastic as a phone app when I'm out buying second-hand books. Well worth the subscription. Well done CLZ Team! — David South on CLZ Books

Read more reviews from customers