Book Database Software
Catalog your book collection
Keep track of your book collection and wish listUse the mobile app or the web-based software (or both!)
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!
Mobile
Mobile app for your phone or tablet
iOS & Android
iOS & Android
USD $19.95
per year
More about the mobile app
Web
Web-based software for your computer
Windows & macOS
Windows & macOS
USD $39.95
per year
More about the web app
CLZ Books
Mobile + Web
CLZ Books Mobile
1 year
CLZ Books Web
1 year
USD $0.00
USD $0.00
save USD $0.00
Or... use them both,
as perfect companions!
Both CLZ Books Mobile and CLZ Books Web 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 Mobile on your phone, then use CLZ Books Web 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.
Latest software updates
New: track your Reading History, plus other new data fields
Dec 17, 2025
v10.4: “One-by-One” mode for adding books by ISBN
Nov 14, 2025
v10.3: Automatic eBay search links
Oct 24, 2025
Jan 2, 2026
Great Organizer
Couldn’t be easier to use. Scanning the barcodes makes life so simple and it can even read the ISBN codes if there is no bar code. Integrates seamlessly with web version and syncs easily. Very, very pleased highly recommended.
Reviews from customers
Jan 4, 2026
Quick and easy
Easy to install on the phone, updates were quick.
Jan 2, 2026
Great Organizer
Couldn’t be easier to use. Scanning the barcodes makes life so simple and it can even read the ISBN codes if there is no bar code. Integrates seamlessly with web version and syncs easily. Very, very pleased highly recommended.
Dec 31, 2025
Finally what I need
Best book catalog app ever.
Dec 30, 2025
Love the app, so easy to use
Love the app. I even recommended the app to my friend. I was able to catalog most of my books all 187 of them. With the 8 books that didn’t show, I am able to manually type in all the info and take picture of the book cover and upload it.
Dec 26, 2025
Weiter so
Sehr gutes und nützliches Tool.
Dec 24, 2025
Amazing
Quick scans great options. Documented everything in about two hours.
Dec 23, 2025
Great tool for book lovers whom have a collection of books!
January 2026, will be my 1 year anniversary of having this app. Favorite points: Easy to use. Organized how I want it. You can take pictures of, the front cover, back cover, and side binding, for the visual memory of the book, instead of only seeing a title. Wish list: I wish the book shelf visual was in the app, with more choices of visuals and color personalization. I wish to synch all of my digital books; Play books, Kindle,Audible.
Dec 22, 2025
The best one
tried a lot of different library apps and this is by far the best one. they have most of the special editions I own, even brand new ones that aren't on the market yet and if they don't have it, it's easy to add, while I really struggled with finding and adding special editions on other apps. also love that it's independent owned and run by a small team!!
Dec 14, 2025
So easy
Makes cataloguing my collection so easy!
Dec 11, 2025
The best
This is the 3rd library app I've sampled and far and away the best! It scans the isbn number even if there's no barcode. It easily identifies the isbn inside a paragraph of words. This makes the job go so much more smoothly!
Dec 10, 2025
Great Organization!
I have the movie app and I thought I would try the book app. It’s easy to use and sort. I love the fact I can scan to add. On my way to my own personal library.
Dec 1, 2025
Best. Book. App. Everrrrr
I have way way too many books and this app has been effortless and intuitive.. plus it works!!! Having subscribed to other book inventory apps in the past that have started crashing at about 500 books im thrilled with how robust the app is and I adore the values feature. Super handy info. Love this app!!
Nov 28, 2025
CLZ
Very well analyzed and implemented application/system.
Nov 25, 2025
Enjoying this app
A blessed weekend. I am truly enjoying this application. It has made such a difference. Every time I work with it adding the tons of books I have I discover "how to" of another feature. I understand better how to categorize my books etc.
I was looking for a free application which I found but it is worth it to upgrade to unlock more features which I am sure I can benefit from.
I was looking for a free application which I found but it is worth it to upgrade to unlock more features which I am sure I can benefit from.
Nov 25, 2025
Highly recommend
I am so happy I downloaded this app. All of my books at my fingertips!
Nov 21, 2025
Best book database I’ve found!!
UPDATE: 11/21/2025 Had an issue with book search and scan . Issue was resolved in a few days. Absolutely love this app. The entire CLZ team are the best. Easy to work with and they listen to dusty.
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.
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.
Nov 20, 2025
Great app for book cataloguing
The is a great app for book cataloguing with a huge database. Fairly easy to use, especially adding new books/editions.
Nov 18, 2025
So helpful!!
It's already paid for itself in duplicate books I didn't buy.
Nov 11, 2025
My Favorite App
I love this app! I was looking for something to track my home book collection. I tried over a dozen and this was by far the winner. Lots of great features, easy to navigate, and best of all the scanner is super fast, and didn’t require tons of adjustments to center or focus. It just works.
Support is fast, friendly, and helpful. As a kid, I dreamed of being a librarian so I guess this app is letting me live my dream.
Support is fast, friendly, and helpful. As a kid, I dreamed of being a librarian so I guess this app is letting me live my dream.
Nov 9, 2025
Easy to use
Yes its expensive but it will have me money in buying repeats. easy to use and if the barcode is missing u can just look it up.
Nov 7, 2025
Almost perfect
I’ve been testing several apps to catalog my book collection and this one is my favorite. My only grievance is that there’s no way to add translator as a pre-fill field. I have several translations of many of my books, so it’s inconvenient to have to go add the translator in book details retroactively every time.
Oct 29, 2025
Sorting using Tags
As an Early Childhood Teacher, it's great for sorting my books by topics with multiple tags.
Oct 27, 2025
EZ to Use
Really well done app. Very intuitive. Was able to catalog over 300 books in fairly short order. Cloud sync with export capabilities. I would like to see the export categories be selectable in future update releases - that would be a bonus! Recommend to all - young children could help sort the library with this - it is that EZ.
Oct 23, 2025
Awesome
This is an amazing app for tracking a library or adding books. I have a library of 2000 books and it transferred very easily...and I am not too good at that stuff. However, the app has been wonderful for not only me, but my family uses it as well. I had my library uploaded to it in about 25 mins and cleaned up quite a bit. I highly recommend this app. It is very functional!
Oct 11, 2025
First week of use
We’re downsizing and have a lot of books to move on. CLZ Books is really easy to use, especially on books with an ISBN code, which it picks up really easily. Either my partner or I can scan and enter them, syncing through the cloud.
So far, very good!
So far, very good!
Oct 8, 2025
Forever Lover of CLZ
I have been using CLZ since what seems like infancy days when I had to organize a very very large library of a film director/historian. I have seen CLZ grow like GREAT technology and it’s worth every penny I pay in my low budget to organize the great books
Thank you CLZ programmers and investors. We need more of both of YOU!!
Thank you CLZ programmers and investors. We need more of both of YOU!!
Oct 8, 2025
Excellent product
Long time user. New features from time to time. Reasonably priced. Get inventory. Easy to add books. Much better than a diy system.
Oct 6, 2025
Book collection
This app delivers everything you could ever need for a book collection.
Oct 4, 2025
Bookstore life-saver
Running a bookstore on a shoestring, selling thousands of books from my personal collection. Adding new books to the database is simple, even for books without ISBNs. Organizing and planning for space requirements and strategy is available if you want to. When the database was my own books, I didn’t use a lot of the fields, but now I am expanding. Flexibilty is a key strength. And the price!
I have also turned to the vendor for help and advice, and thought the customer service was wonderful. I believe they listen to users when preparing new releases. The on-line manual is better than most I’ve used.
As someone who worked in IT for thirty years, in roles from help desk to network installs, from preparing design to writing code to user implementation, I look at this from several angles, and I think this is a solid app that’s fun to use.
I have also turned to the vendor for help and advice, and thought the customer service was wonderful. I believe they listen to users when preparing new releases. The on-line manual is better than most I’ve used.
As someone who worked in IT for thirty years, in roles from help desk to network installs, from preparing design to writing code to user implementation, I look at this from several angles, and I think this is a solid app that’s fun to use.
Oct 3, 2025
Love this app
So easy to use and keep me organized.