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!
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

Dec 9, 2024
Professionelle Ordnung in der eigenen Bibliothek!
Tolles Programm, das einfach erlaubt die eigenen Bücher zu erfassen, zu katalogisieren, sodass man die Übersicht behaltet über seine Bibliothek! Und es wird laufend -ohne Mehrkosten- aktualisiert! Top Software für Bücherliebhaber.
laubem (Switzerland) on CLZ Books Mobile
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
Nov 29, 2024
Almost perfect
Almost perfect but keeps getting better: sounds impossible but it's true. The app is dependable and flexible. It works well whether you choose to capture every detail of a publication or just the basics. I am not an employee, or a relatiive of anyone in the development crew.
oude kerk (USA) on CLZ Books Mobile
Nov 28, 2024
Happy with this program
Been very happy with this program. I need to be more conscientious about keeping it up to date but it tracks all my books and gives me ability to search, sort and organize as I need.
William McCourt on CLZ Books Mobile
Nov 28, 2024
Great App
I use it all the time to keep track of my books. Definitely recommend it.
Stuart Cathcart on CLZ Books Mobile
Nov 27, 2024
Absolutely Love
This app is exactly what I was looking for to catalog my books. I found myself buying duplicates, and decided to go in search of an app that would help me keep track of my books. CLZ Books - library organizer does exactly that and more. I keep books in different rooms in my house, I can note where the books are, mark if I have loaned them out and to who, I can rate them and note when I read them and keep personal notes. It is easy to use, and after initially loading my books, I am able to scan new books easily to add them to the collection. Highly recommend if you have a good amount of books you would like to keep track of.
Booksrox (USA) on CLZ Books Mobile
Nov 27, 2024
BEST. THING. EVER!
Fantastic! I've got a card catalog in my phone for all my cozy mysteries.
Vault 713 on CLZ Books Mobile
Nov 26, 2024
The app has been working amazingly for me
I was busy adding more books and sorting things out at my house…. I have needed this app for a long time because I just love buying and gifting books, and everybody who knows me gives me books for presents! So I have a lot of them.

Everything is going very smoothly now that I have figured out how the app works, and I just watched a video on the App Store and learned how to add IBN numbers when the code is obscured, so even better! I just rated the app on the App Store and, needless to say, gave it five stars!

I have not yet tried editing, but I will work on that in a few days when I have finished loading in my remaining four stacks of books! (Yes, I am a little bit crazy. At least I know it!). Now that I am mostly retired, I have more time to read and do these kinds of things—it’s really nice.

I should’ve known that such a great app would come from Amsterdam, perhaps my favorite place in the world! Have some poffertjes for me!! I’m still working on my Gouda collection from my annual trip, which was in May this year! Cheese, coffee, and books—my favorite things!

Sigrid (USA) on CLZ Books Mobile
Nov 24, 2024
I love this app
Makes shopping & thrifting so easy adding to my collection. I also use this app for my film collection.
Kelly Carroll on CLZ Books Mobile
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
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 22, 2024
Lifesaver
I own several hundred first editions and having the list—with condition and price— at my fingertips is huge as I dig through used bookstores whenever I travel. Plus, I don’t know how many times CLZ Books has stopped me from buying a book I already own.
Svbenzi (USA) on CLZ Books Mobile
Nov 22, 2024
Wonderful app
Easy, wonderful way to organise books, thank you!
Pupsik! (United Kingdom) on CLZ Books Mobile
Nov 22, 2024
Great app!!!
I have a lot of books, and I tend to buy those in a certain genre: biography, history, adventure tales about the sea and exploration. Then, when I go in a bookstore and see an appealing book, I would wonder if I already had it and in an excess of caution would often buy it. I knew that I had some duplicates, and this app was great for helping me figure out what I already have and shouldn’t purchase, so I figure that it pays for itself!
I also love that it lets me note where the books are, so that, if I’m looking for a history of Ireland, I know that it’s in my home office. And scanning the books is super fast and easy! I would give this 10 stars if they were an option! I learned about this app from a bookstore and only wish I’d known about it sooner!
Santanas (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 21, 2024
Useful app
Very, very useful app, but also an immense support environment. Good price kevel.
Pieter Westdijk on CLZ Books Mobile
Nov 21, 2024
Perfecta
Con mejoras continuas. Nunca me ha dejado colgado y cubre todas mis expectativas
Pedro García Arsenal on CLZ Books Mobile
Nov 20, 2024
Superb collections database
I have used this software for many years and I find it does exactly what I want and more. The developers are always willing to help should any problems occur and the product is always being updated. Superb!
KeithieW (United Kingdom) on CLZ Books Mobile
Nov 20, 2024
Very good
Flexible database for books very easy in use in your own language.
bookrob (Netherlands) on CLZ Books Mobile
Nov 19, 2024
Beste book data base
Al gebruiker vanaf het eerste uur, iets moeilijker bij de start jaren geleden, maar een fantastische manier om je boeken bij te houden.
De meeste van onze boeken zijn oude boeken, 1600-1800 en dat blijft nogal wat werk om alles foutloos in te tikken, of je vind ze niet meer terug, maar toch super, om je collectie op de slaan. Ik ben nu aan ongeveer nr 2000, maar aangezien het veelal meerdere volumes betreft toch al zeker 3000 boeken. Ik ken geen betere manier om alles bij te houden.
Recentere en nieuwe boeken, dat is echt eenvoudig, barcode scannen, pc openen en alles klaar, super toch! Ook alles op je iphone, super om na te kijken op de boekenbeurs wat je al in collectie hebt of niet! Wij zijn daar super tevreden mee, zelfs al vraagt het soms wat werk om de oude boeken te catalogeren.
Ook verplaatsen van collecties, uitprinten, heel veel mogelijkheden.
Met dank aan alle bedenkers en ontwerpers van CLZ !
Magda De Smedt (Belgium) on CLZ Books Mobile
Nov 18, 2024
Love this app
I've been using CLZ books for years (thank you Kim Komando ) and I love it. When I've had a question or problem Alvin has always been right there online with suggestions and solutions. If only every app was this wonderful.
Maxim “Max” Dowd on CLZ Books Mobile
Nov 18, 2024
Cool app
Now I have all my books indexed in a proper and useful way!
mario55mar (Portugal) on CLZ Books Mobile
Nov 18, 2024
Applicazione eccellente
Completa e piena di informazioni da inserire. Customer service superiore
Mario Sgobbi on CLZ Books Mobile
Nov 17, 2024
My books organized
Great way to keep all your books updated and organized. every time I go buy new books I scan them in and get them saved!
Brittany Booth on CLZ Books Mobile
Nov 17, 2024
Awesome App
I have been using this app now for about 3 years to organize my 100’s of sewing books/magazines and sewing patterns. This app has been a Godsend because now all I have to do is look in my app to see if I already have a pattern or book related to whatever I need or want to sew. No more wasted time searching through boxes or shelves for something I may not even have. I sorted my patterns in boxes that are labeled to match the folder for that group of patterns on my CLZ app. I did the same thing for my books and magazines on bookshelves.
LOVE this app and would not want to do without it.
ArmySgt80 (Canada) on CLZ Books Mobile
Nov 16, 2024
Bookworm
My husband is an avid bookworm, and I use CLZ books to catalog every paper or digital book he owns. It's easy to use and it keeps getting better and better with every update. I have been a subscriber for awhile, and I can't imagine being without CLZ Books.
Karin Powell 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 15, 2024
Essential app for book lovers!
I have thousands of books collected over decades and the CLZ Books app helps me keep track of all of them. The CLZ team are also really helpful if I’ve ever had a query or need help with anything.
jjjcompass (Australia) on CLZ Books Mobile