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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

For phones/tablets

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

For computers

Web-app for Windows and macOS

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

For Windows only

Download for Windows

  • For advanced Windows users only!
  • Install on one Windows PC
  • Manage your own data & image files
  • Sync data to CLZ Cloud (optional)
  • 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

I’ve been using CLZ software (mainly Book Collector, but also Music Collector and Movie Collector) for very many years in both the mobile form and as a desktop app. No other cataloging software comes near this in terms of quality, ease of use and value for money. Although I’ve rarely needed to use customer service, I have found that they offer a fast and friendly response to any queries. As a collector I have over 6000 books and I would be lost without this software. — IainChallis on June 23, 2021

Reviews from customers

July 19, 2021
I love this app
I use it daily to manage my extensive book collection. It has very many useful options for sorting your books. It also has an option to add your thoughts on the book such as a rating, whether you have hauled or unhauled the book, when you read it and purchased it etc. Excellent app I have been using it for several years now. — Sarah Barden on CLZ Books
July 17, 2021
It's a great way to keep track of my collection. — Rich Umbenhauer on CLZ Books
July 13, 2021
Perfect app, makes things so much easier!
As someone who is always buying books, and couldn't keep track of what I had, this was a must have for me! You can mark them as part of a series, and what order they go in, you also can edit any field to what ever you want if you want a different way. Now I always know what books I have in a series and never bought a double again! I've enjoyed it so much I use their Movie app too, and subscribe to the online service for a version of both on my laptop! — Rob Conley on CLZ Books
July 08, 2021
Love this app
I love this app and have been using it since its inception years ago. It's a great ways to organize and track all the books I buy and read. It has evolved a lot over the years and is continually getting better. The developers are very attentive to detail and very responsive with support and even suggestions. — John Barber on CLZ Books
July 06, 2021
Fantastic app
Fantastic, books are entered so quickly, and if they can't be scanned they are easy to put in. — John Ess on CLZ Books
July 01, 2021
Love this app!
I use CLZ books to manage my quilt books library. It helps me avoid buying duplicates which is good for my wallet. It’s also easy to add new purchases to the collection. Thank you, CLZ, for keeping me organized!! — JCquilter on CLZ Books
July 01, 2021
Very good catalog
I've been using this for a few years now for my modest (~5000 books) collection. The iPhone and iOS apps are handy for on-the-go access, adding books, and basic editing, though the Mac app is more full-featured. Synchronization has been flawless. The ability to check my catalog while in a bookstore is invaluable. — Anton Rang on CLZ Books
June 26, 2021
It just gets better!
I’ve been using CLZ Books for probably 15 years. First on my desktop, then on my laptop, then on my phone, and now mostly on my iPad. I’ve seen all the changes and updates and I just LOVE this app! It keeps getting better! Even when I had a small glitch, the great crew was right on it and had it fixed in no time!
I recommend it and show it off any chance I get, mostly at bookstores! — Stephanie Griffin on CLZ Books
June 25, 2021
Excellent App
This Book Collector App is excellent. I have a very large book collection and the ease that I can access what books I have has been essential when searching for both used and new books. I have used the CLZ App for over 7 years with only one recent problem. I contacted CLZ and they corrected the fault Immediately. I used the CLZ App on iPhone and iPad. The ability to enter books that I have and books that I am looking for makes this App excellent. — Nongambler on CLZ Books
June 25, 2021
Great support experience
I had a problem with the app crashing with the latest release. I submitted a support request and they quickly got back to me, stepping me through how to send a crash log. They then quickly fixed the problem and let me know to install the new version from the App Store. — JimM55 on CLZ Books
June 24, 2021
Excellent choice
I would like to thank Alvin, Sytske and the team for all assistance given over the past 5 years; your cataloguing software proved an excellent choice for recording some 7,500 books in an important legacy private collection. The ability to then share the catalogue with a wide variety of potential inheritors and auction houses has made the final distribution of the collection both straightforward and effective. I will certainly recommend Collectorz in future where appropriate. — Richard Campbell-Howes (United Kingdom) on Book Collector
June 24, 2021
Amazing App and Amazing Support
So, I’ve had this app for multiple years. Completely recommend to everyone and I haven’t found another app that provides the same level of support and app creation. There are so many options for collectors and for casual book-lovers to personalize your catalogue.
So, recently I had a issue with the app. My accounts weren’t syncing to the cloud. So i sent in a email support request at 8:28 am and received a reply at 8:41! I didn’t have to sit for hours worrying. They guided me through what I needed to do and have access on their end to see what the problem is. My issue had been solved at 10:00 am on the same day!!
I cannot thank the customer support agent enough for the fast service and the great guiding!! 100% would recommend this app! — Girt374(,!29; on CLZ Books
June 24, 2021
Best App and Customer Service App Ever!!!!
I am most pleased to post a review for the CLZ Book App. I truly love this app. I searched for a cataloguing library app for years to catalog my book library. For years, I kept a paper copy of my books, but found this to be ineffective due to the fact that my collection over the past twenty-five years had grown by the thousands. But luckily, I kept searching and found the CLZ Book App. A couple of years ago, I read all of the reviews and convinced myself to purchase the app. Over the past couple of years, I have spent so much money on apps that promise, but do not deliver. But after purchasing this app, I can honestly say that my faith was restored. This is the BEST app for developing and maintaining a library.
It’s easy to input the information about books and the developers are constantly making changes to make this the best book cataloguing app ever. In the couple of years that I have used this app, I have found the developers are very responsive and responded quickly whenever I had an issue.
If you are looking for an app to develop your library, the CLZ Book App is the answer. I highly recommend this app and give it a 5. If I could, I would give it a 5+++++. — miss BCAEA on CLZ Books
June 23, 2021
Five star cataloging software!
I’ve been using CLZ software (mainly Book Collector, but also Music Collector and Movie Collector) for very many years in both the mobile form and as a desktop app. No other cataloging software comes near this in terms of quality, ease of use and value for money. Although I’ve rarely needed to use customer service, I have found that they offer a fast and friendly response to any queries. As a collector I have over 6000 books and I would be lost without this software. — IainChallis on CLZ Books
June 23, 2021
Must have for book addicts!
I have used this app since it was born, starting on Windows desktop and watching it grow, to newer platforms. With close to 18000 books, It has saved me money...... Before I purchase a new book, I quickly check to see how I rated the author and to avoid buying duplicate books. Updates have always been smooth and their support is outstanding. After using this app for over 20 years, experienced the first hiccup. As always, they responded quickly (unlike other developers) and within a couple of hours had uploaded a fix. I did computer systems in my previous life and would have hired these guys! — Still retired on CLZ Books
June 22, 2021
Perfect for our Clubhouse library
Love this app. It works perfectly for our community library of more than 5,300 books. Our card catalog used to be 3x5 index cards that were never updated regularly, so CLZ Books really helps to keep track of what we have. — V. Stephens on CLZ Books
June 21, 2021
First Class App
I have been using this app for a number of years. At the beginning, it was fairly basic but over the years the updates have constantly improved it and I cannot think of any improvements now that I would like to see. I sent an email today with a query that I have and within two hours it was sorted out for me, unlike a lot of other apps who say you need to wait 24 or 48 hours for a response. Top Class service. — Mortimermousemax on CLZ Books
June 20, 2021
A spectacular piece of software
A spectacular piece of software that's updated regularly and with great awareness of user needs. Constantly improving on an already best-in-category app. Easily the one piece of mobile library software worth the cost...Amazing developer, superb app! — Shawn Nacol on CLZ Books
June 20, 2021
CLZ Books - Book Inventory
CLZ Books - Book Inventory
I have owned CLZ books for nearly ten years and could not be happier with it. It is worth every penny. The most convenient feature of the app is the bar code scanner. You can add books to your inventory or see if you already own a particular book. — proculus1 on CLZ Books
June 17, 2021
Great app
Great app! I don't have a large book collection but it is always nice to have a nice app like this handy. — Francisco Vidal on CLZ Books
June 14, 2021
CLZ Books
I’ve been using the Collectorz.com for Books since 2016 and have not found another as good as this one. Whenever I’ve had to contact the with any sort of problem it’s been answered very, very quickly.
If you have either one of the collections that they do, ie Movies, Books, Music or Games and would like to catalogue them, then I’d strongly recommend collectorz.com. — Jackdaw09 on CLZ Books
June 14, 2021
Best book database I’ve found!!
UPDATE: once again, Alwin and his team provide the best customer service available! I noted an issue and received an immediate (less than 2 minutes!) response. Naturally, he was right and I was wrong, oops. Keep your book collection neat and tidy everywhere you go.
CLZ Books has to be the best app available! The developers spend countless hours upgrading, improving and revising so that the end user experience is fantastic! I can think of no other app that I recommend so vigorously. Been using CLZ Books for two years now and have been pleasantly surprised. Top quality customer service. (This alone grants the developers 5 Stars) Inexpensive compared to other apps. They are continually interested in updating and improving this app for everyone. Easy to use and enter new books. There’s a space for almost everything and the final result will help you keep track of all your times. Many thanks. — Consumerpaul on CLZ Books
June 14, 2021
School library
Great app to keep track of our book collection. — Th0Gr0 on CLZ Books
June 13, 2021
Great program. Support is fast and superb. Easy to learn & use. — Frank Kirk on CLZ Books
June 11, 2021
Excellent app for creating and maintaining your book collection. I've been using their comic book database manager for years and decided it was time to oversee my massive book collection as well. — Michael Curtis on CLZ Books
June 10, 2021
Great Apps
I use three of the Collectorz Apps - Books, Music and Movies, and they are all a joy - reliable, intuitive, and packed with filing and sorting features that make it easy to keep tabs on all my collections. Cloud sync across all devices works beautifully too. Highly recommended. — JohfDal on CLZ Books
June 08, 2021
Tracking my books
A great app for tracking my books. I also use other variants for games and movies. — Patrick Davis on CLZ Books
June 07, 2021
Great app, finds 99.9% of the books I scan. — Brad Wallace on CLZ Books
June 07, 2021
The best app on my phone
This is maybe the best app on my phone. I used to have a real problem with accidentally buying books I already owned, but now all I need to do when I'm out book shopping is just check my catalog in the app if I'm ever unsure. Naturally you get the most out of its features when it's linked to the CLZ programme on your computer, but I'm sure it would work perfectly for someone just using the app. I'm a library professional, and I feel like CLZ perfectly blends easy use and robust features. — V33 A99 on CLZ Books
June 05, 2021
Highly recommended!
Easy to use. Well supported for any problems or questions, and the product keeps getting better as the designers keep adding useful tools. — Alberto Garduno O. on CLZ Books

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