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Book Collection Software - catalog your home book collection by ISBN

Automatically download book details by ISBNLike author, title, publisher, genres, subjects & cover art.
Just search our huge online isbn database ... ... by ISBN or by author & title.

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

Reviews from customers

October 06, 2021
No more duplicates
This is a terrific App. You carry your book collection in your pocket which enables you to make a quick check before making a book purchase. App is well set up with good support screens backed up via first class online support. — Paisley Saint (United Kingdom) on CLZ Books
September 27, 2021
I love this app
We have a ginormous book collection and once I put the time and effort into organizing and scanning all of them, it has been so easy to look up what we have when out. Because of sharing the database, we both can refer to it too. Super easy to use, and we'll organized. We grabbed music version as well. — Nell Ruedin on CLZ Books
September 08, 2021
Easy to use system
I finally found an easy to use system for cataloguing my specialist book collection. I am sure I only use a small proportion of its capabilities but it’s straightforward and the customer service is excellent. — Toucan 2oo (United Kingdom) on CLZ Books
August 29, 2021
Book collection app
Finally a well functioning book collection app! Bonus points for the sync function. — Sylvia Schaffrath on CLZ Books
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
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 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 11, 2021
Excellent
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 01, 2021
The best and always getting better
I have been using CLZ book collector for years. It is so useful, dependable, and a pleasure to use. It’s just the best book collection catalogue app and i have tried several. Great value for the price. Customer service is top notch and the team is always listening to users and making a great app even better. Highly recommended — MagoryOH on CLZ Books
May 31, 2021
I couldn't live without it!
Great database maintains my 1200 book collection! Before buying another I'm able to immediately check my current inventory. — Keith Krokyn on CLZ Books
May 21, 2021
Brilliant!
CLZ Books has been the perfect way for me to catalogue my extensive book collection. The regular App updates continue to expand my data base. The CLZ team are so helpful too whenever I’ve had a query. — jjjcompass on CLZ Books
February 23, 2021
I love it!
It is helping me to organize my cookbook collection in record time. I read about it in an article regarding the woman who holds the Guiness Book of World Records for largest cookbook collection. I figured if it worked for her 7,000 cookbooks it would work for mine too! — Carol Baker on CLZ Books
February 22, 2021
Best app for Collectors, hands down!
I highly recommend this app! It’s super intuitive and easy to use! I use it every day to manage my ever growing book collection. This company cares about their software and are constantly updating and improving features. Give it a try! — Jon U on CLZ Books
February 02, 2021
So easy to use
I have enjoyed using this app. Cataloguing my book collection has been so easy and the ability to search the core for book details is a blessing. — Andrew Vaughan on CLZ Books
January 31, 2021
Great Book Cataloging App
CLZ Books is a very well thought out app for cataloging book collections, and has been getting better and more comprehensive in recent upgrades. The support team are great - queries are usually answered quickly and clearly. I've been using Collectorz software for a few years now, and have always been impressed by their helpfulness. If you have a book collection and you'd like to have a reference to it on your mobile device, CLZ Books is worth putting at the top of your list for consideration. — Sounztorm on CLZ Books
January 04, 2021
Very good app
The app does everything I want it to do to catalog my book collection. It is easy to use. It has many fields for recording whatever info you want to record about your books. — Elliot The Accountant on CLZ Books
November 02, 2020
Awesome app & excellent support!
I've been using this app for about 2 months, and couldn't be happier. I'm using the app in a slightly unconventional way - not for a personal book collection, but for the school's PTO book collection. The cloud feature of the app allows me to upload all our books, for parents / students to view what's available, and the flexibility of the app allowed me to customize each record to allow for people to select books they wanted.
Populating the app was very simple by scanning ISBN barcodes, and even when a barcode wasn't available, a manual entry was very easy to do. I did do some editing of records to ensure consistency across our database, but this too was very easy. I also edited a number of cover images by adding my own - again very simple a straightforward!
I highly recommend this app. Not only is it comprehensive yet simple, it comes with a first class support team. On occasions when I have had questions, I have dealt with three different support analysts, and each has been highly responsive, knowledgeable and friendly. You can't go wrong with this app! — Paulaclaire on CLZ Books
October 02, 2020
Great program
Thank you one and all for making such a great program for my book collection. I started using CLZ Books not long after it was introduced and at every iteration it has gotten better. The best part is that even an old man can easily understand and use it. — Jim Howell (USA) on Book Collector
August 27, 2020
Blown away
I just purchased Book Collector, and I'm blown away at how much this will be able to organize my over 5000 book collection. — Randall Sykes (USA) on Book Collector
August 16, 2020
Finally organized my book collection
This is a great app and has helped me to finally organize my book collection. Their customer service is also excellent. I had a small problem, which was down to the setting of my app. I emailed them and they were very quick to respond and resolve the issue for me. — Andrew Craig on CLZ Books
April 16, 2020
My book collection cataloged
With the help of my 5 cats, taking turns in my lap supervising, I've been able to finally get ALL of my book collection cataloged. Thanks so much for all you folks have done for this. — Tina Deaton (USA) on Book Collector
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
January 21, 2020
Thank you CLZ!
I am amending my review to reflect the wonderful customer service I have received, as well as the functionality of the app. Of all the apps I tried to catalog my antique book collection, CLZ Books is my favorite. I like all the various data you can input, including reading date and price. My collection is from well before ISBN numbers (being published prior to 1900), so ease of manually inputting all of the data I want is important to me. I did try out scanning on one current book and it worked very well, but I haven't explored that side extensively. Edited to add, I just added a sci-fi/fantasy collection and used the ISBN scanner and was wowed by the plot summaries that came up! It's so fun! — RockyMtnSky on CLZ Books
December 19, 2019
Fantastic App
I bought CLZ after 15 years of using and maintaining my own custom built database. I couldn’t be happier. Perfect for cataloguing your book collection ! Has custom fields and tons of standard fields. Quickly add books to your collection by scanning bar code or entering titles/authors. Beautifully syncs with browser based and desktop app. Can’t beat it. — Rndmnknm on CLZ Books
October 26, 2019
Great app
Great app to easily organize all your book collection. All my books are available go me on a quick and easy app. — A Google user on CLZ Books
October 19, 2019
CLZ Books
I purchased my CLZ Book Collector mid-2005 to inventory my late husbands book collection which is now over 4000 and counting. First, I have to compliment the CLZ support team for their immediate and helpful response over these years to any inquiries, technical or otherwise. I recently purchased the CLZ Book app. I look forward to utilizing as going through my collection on the app I can maneuver easily, access any title, author, and readily add to the collection. The app provides convenience and flexibility away from the laptop. Props to the CLZ team who continually work to improve their product for the benefit of their customers. Cheers! Camilla — Props to CLZ on CLZ Books
September 09, 2019
Nothing’s perfect, but some things are close
I tried three other apps before I settled on this one for cataloguing my fairly extensive book collection (around 3k volumes). The deciding factors were: ease of use, particularly in finding relevant catalogue records from ISBN with or without barcode; use on both iPhone and iPad (synchronised, obviously); some potential for additional bespoke data items I might want to add; and good customer service from the developers. This is the app that ticked all those boxes.

The interface is good, easy to use, and I’ve added a lot of records very quickly, at the shelf with my iPhone. They often need editing (different editions, covers etc), but this is done easily and effectively. Synchronisation is excellent, and indeed you can access your database through the web interface, and there are Windows/Mac versions (at a price). I haven’t fully explored the additional data fields available, but they seem good. And as well as seeing a number of reviews which mention the excellent customer service, I’ve experienced it myself, with very full engagement from the developer with the issues I’ve raised - none of which have been major.

Nothing is perfect, and there are things that could be improved. You can’t do multiple item edits on the iOS version (you can on the desktop versions), eg to overwrite all “genre” entries across a number of records. There are some slightly awkward user interface issues in inputting records (issues the developer has agreed to consider). But I have confidence that the app will improve - it’s regularly updated - and it’s building on a very solid basis. So overall - I’m very happy. And I don’t say that about many software products! — Ben0779 on CLZ Books
July 23, 2019
Works great
Brilliant app for categorizing your book collection. Recognizes most books via ISBN barcode, even non-english books. Author and title search often find similar books if your barcode is not the same. Full manual entry also works.
Support answers quickly and politely even to questions that can be found in the manual. — Jorn Haugland on CLZ Books
June 16, 2019
Thank you CLZ!
I am amending my review to reflect the wonderful customer service I have received, as well as the functionality of the app. Of all the apps I tried to catalog my antique book collection, CLZ Books is my favorite. I like all the various data you can input, including reading date and price. My collection is from well before ISBN numbers (being published prior to 1900), so ease of manually inputting all of the data I want is important to me. I did try out scanning on one current book and it worked very well, but I haven't explored that side extensively. I am excited to unpack the rest of my collection and get them entered into CLZ Books! — RockyMtnSky on CLZ Books
June 13, 2019
Convenient scan using mobile
This is a very convenient way to maintain my book collections, and check whether I've already got a book wherever I am. — Marty Pilott on CLZ Books

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