Library Software

Catalog your book library

Automatically download book details and imagesLike author, title, publisher, genres, subjects & cover art.
Just search our huge online book database ... ... by ISBN or by author & title.
Over 40 million ISBNs recognizedGuaranteed 97% success rate on your ISBN searches!
CLZ Books icon CLZ Books
Mobile
Mobile app for your phone or tablet
iOS & Android
example
USD $19.95 per year
More about the mobile app
CLZ Books icon CLZ Books
Web
Web-based software for your computer
Windows & macOS
example
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

Dec 4, 2024
CLZ books library
I’ve been with Book Collectors Connect, now CLZ, for many years. Best way to keep a large library of books. I appreciate the ease of use program and the team is readily available whenever you have questions or need help.
halftracker (USA) on CLZ Books Mobile

Reviews from customers

Nov 24, 2024
Lifesaving!
Cataloging my over 1000 book Time Life Library...Lifesaving!.. I've cataloged my Time Life record collection on CLZ as well!
Terry Breen on CLZ Books Mobile
Nov 23, 2024
Excellent app!
My partner and I have been using CLZ Books to organize our 1,000 plus library since the beginning of November. The upgrade with ISBN character recognition gave us an huge boost just as we were beginning to bog down. The whole app is just wonderfully done. We sent a question to support one evening and had the clear answer the next morning.
Arthur Mislug (USA) on CLZ Books Mobile
Nov 22, 2024
Phenomenal
This app has been phenomenal for me over the last year (& some change)! It was recommended to me by someone who I chatted about books with a lot, after being mentioned in passing as a way she kept her own library (& urge to organize) in check. When I had a big move coming up, I asked her to remind me the details, and if she thought it was worth the subscription costs, and she enthusiastically did so. Despite the recent increase in annual cost, this epic tool has been a life (& wallet) saver!
Adrian Manners on CLZ Books Mobile
Nov 22, 2024
The best I’ve found
I have over 1200 books and have used a number of catalog apps over the years. CLZ Books does the job of keeping track of my library and gets syncing right. Most importantly (speaking as a software developer) they keep improving the app. It’s tough to make a business of niche software products. These folks have apparently figured out how to make a go of it and they keep improving. Kudos to them!
LEK2 (USA) on CLZ Books Mobile
Nov 16, 2024
An excellent app
I have used this app for over a decade and it just continues to get better and better. I highly recommend it if you have a library of books to keep track of.
AndyW-Melbourne (USA) on CLZ Books Mobile
Nov 15, 2024
User-friendly for all age groups
Finding this app at 63 was a blessing. I have an extraordinary library and continue to collect, yet sometimes you find out you already have the book. This app has been helping me keep track of my existing library and when shopping, I pre-scan the book to ensure I don't own it. Thank you.
Sherlocked61 (USA) on CLZ Books Mobile
Nov 8, 2024
Lifesaver
I would just like to thank you for your marvelous Book Collector application. It has been a mainstay that helps me manage my book library for many years now. The flexibility is incredible and accomodates my changes in the way I access and use my books. I am about to finish my MA degree and during my school years I used this application to quickly find books on topics I was doing research papers about. It has been a lifesaver!
Blessings on you for creating and maintaining this application.
Donald L. (USA)
Nov 6, 2024
Useful tool
My wife is the library committee chair for our retirement community and we have used CLZ Books as our catalog for our 1600 books. it gives us many useful tools for this activity. We know what we have in our collections so we can check donations for duplicates. We use it when we order or shop for books to ensure that we don't purchase duplicates and waste our limited funds. The fact that we can see our cloud library on all of our devices makes this available anywhere and for both of us.
Curt Moll on CLZ Books Mobile
Aug 21, 2024
The best I have found
I have over 1200 books and have used a number of catalog apps over the years. CLZ Books does the job of keeping track of my library and gets syncing right. Most importantly (speaking as a software developer) they keep improving the app. It’s tough to make a business of niche software products. These folks have apparently figured out how to make a go of it and they keep improving. Kudos to them!
LEK2 (USA) on CLZ Books Mobile
Jun 17, 2024
Highly recommended
The app does a great job of keeping track of my library. It's easy to add books, and to keep everything synced with my CLZ account in the cloud. Great support as well. I recently had an issue with the app (I couldn't add a new book), and the support team worked with me until the problem was resolved.
Tim Kynerd (Sweden) on CLZ Books Mobile
Jun 11, 2024
Easy to scan and upload
Started with CLZ on the computer storing all the wife's books in her library, after a few walks back and forth II downloaded mobile app and haven't looked back, easy to scan and upload.
Douglas Berwick (Australia) on CLZ Books Mobile
Apr 27, 2024
Outstanding
Outstanding Library Organizational Tool!
Roburt Coates on CLZ Books Mobile
Apr 15, 2024
Great software
I’m a long-time user of Music Collector, thought I should finally catalog my book and music score library. That 7-day trial with Book Connect has made data entry much easier. Once I get my collection in, the mobile app will probably serve my purpose. We’ll see!
Thanks for the great software. Feeds my OCD challenges.
Dennis R. (USA) on CLZ Books Web
Oct 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 Mobile
Aug 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)
Jun 8, 2023
Quick to get organized
Took a few days to figure out How To, but once I self -learned, it's so quick to get my library organized.
Susan T on CLZ Books Mobile
May 28, 2023
Fantastic product
Fantastic product that also has fantastic customer service support if needed. Direct support provided by savvy engineers included in license purchase. A great asset having your library in you pocket, always backed-up to the cloud!
birdwriter1 (United Kingdom) on CLZ Books Mobile
May 28, 2023
Easily 5 stars
Makes tracking your book library as easy as it could possibly be.
Gary Pierce on CLZ Books Mobile
Feb 20, 2023
Library
Great way to keep track of my written library.
Morg Jones on CLZ Books Mobile
Jan 4, 2023
My llbrary
Great way to keep track of my library.
Bruce Thacker on CLZ Books Mobile
Aug 17, 2022
Great app, great team!
I have been using this app for at least four years. The use is intuitive, the acquisition system is quick and the database is extremely well-stocked. The cards have an incredible variety of data with high customization. Furthermore, the support in case of need has always been fast and decisive. I highly recommend it for those who want to keep their library in order.
MattiaLusetti8519 (Italy) on CLZ Books Mobile
Jul 30, 2022
Your library in your pocket
User friendly app to keep track of books, music, and more. Know what's in your media library and avoid duplicate purchases. You can even create a wish list for items to add to your library. Works on a desktop computer as well as a smart phone.
CB Youngblood on CLZ Books Mobile
May 22, 2022
Perfect to keep track of everything
Downloaded the trial and started adding books, upgraded to yearly subscription within 1/2 hour! Most of my library is packed away for a bigger house so this app is perfect to keep track of everything I have and don't have as I keep going with my collection. The book Nerd and organiser in me LOVES this app!
Lozzerella (USA) on CLZ Books Mobile
May 18, 2022
Love it
So easy to use! So great to finally be able to catalog our library..and find when we have more than one copy of something!
Mary Priestley-Fine on CLZ Books Mobile
May 6, 2022
Book library
I recommend Collectorz to all the collectors I know and my father-in-law loves it for keeping track of his extensive book library.
Linda Fay (United Kingdom)
Mar 29, 2022
Love Book Connect
Many thanks as always for your kindness and generosity. I have always appreciated working with you.
A real blessing to me to keep my library in shape. You have a GREAT product in Book Connect, and I can be assured that all your other offerings have the same high degree of excellence.
At age 82, I really appreciate the simplicity and completeness of Book Connect.
Larry Gilliland (USA) on CLZ Books Web
Feb 26, 2022
Book Collectorz is one amazing application!
I've been using it now for a few years to manage a 1000 book library collection for my quilt guild. What I really love is that the Collectorz team is constantly making improvements to the app that make it easier and faster for the user to manage their collection. The team is responsive and genuinely interested in what their users have to say about the program. The app is simple to use, and very intuitive. You can slice and dice your collection in any way you want to see what you have, and there are a lot of customizable fields if you have specific interests. The connection to "core" is flawless, and simply by putting in the ISBN from the back of a book you get all the information you need in seconds. The price is very reasonable for the value you get from this app.
While I haven't used their other products, I'm sure they are just as refined and useful. Thank you CLZ team, great job!
Mary Pimentel-Wheeler (USA)
Jan 27, 2022
Great App Organizer
I am an avid reader and collector. I never thought to have a catalog system for my books. After using this app to get an idea of my library, I found that I purchased several books twice. Donated those to the local library.
Sherlocked61 (USA) on CLZ Books Mobile
Jan 3, 2022
Great tool for your library
Just started with the app. Very user friendly and gives you clear overview of your book library in various views, along with some other characteristics of each of your books.
Ad Kolsters on CLZ Books Mobile
Dec 9, 2021
Accurate and user-friendly
This is an excellent app that provided me with the means to create a decent inventory of a small school library. It is very accurate and user-friendly and I am able to create new titles, link existing ISBN's and access my numbers instantly. Highly recommended.
Stephan E on CLZ Books Mobile