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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

Mobile app

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


Downloadable software

  • Downloadable desktop software
  • Install on one PC or Mac
  • All data stored on your computer
  • Sync data to CLZ Cloud (optional)
  • Free CLZ Barry barcode scanner app


Web-based software

  • State-of-the-art online software
  • Login and use from any computer
  • All data stored in the CLZ Cloud
  • Automatic updates & backups
  • 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

So happy to be a part of the CLZ world wide family. Your team has made my life a little easier by helping me manage my home book library. May the new year bring all of you good health and happiness. Happy New Year! — Katherine Mackenzie (USA) on December 30, 2020

Reviews from customers

January 13, 2021
Great program
Great program to keep track of all my books and great customer service get back to u same day. — B Kelley on CLZ Books
January 07, 2021
Love the app
Two days into using the app and my Partner and I have logged over 150 books of every flavor, super easy. — Nathan Devonshyre 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
January 03, 2021
Great Book Cataloguing App
I really like the CLZ Books app. Previously I had a free app that was a lot of work. What I really like about CLZ is that I don’t have to keep typing in the location of books on the same shelf. The next book I enter automatically is at the same location and I can change locations when I want. It seems like a small thing but actually saves quite a bit of time. Previously I had a free app that required typing in the location for each book. Another feature I like is the large amount of books available when I search by title so I don’t have to manually enter very many books. Finally, the colors on the list of my books is a nice touch. I am very happy I found your app which makes cataloguing books fun rather than work. — Kf2Kt on CLZ Books
January 01, 2021
Thank you again for collectorz!!
Love the new Pre-fill screen feature!! Great feature!!! I have always had to edit each book to add additional info, so this is awesome!!!
Thank you again for collectorz!! It has been such a blessing to be able to catalog all my books. — Denise Askea (USA) on Book Collector
January 01, 2021
I use Book collector almost every day!
Dear Alwin and all at CLZ,
Thank you so much for all you have done to keep this amazing program going! 2020 has been so difficult and having access to organizing my books has been one of those pleasures that bring peace in chaos. I’m in the USA, so you can imagine…no don’t, it’s not worth it yet.
Seeing your Christmas card made me smile and cry at the same time. I hope the celebrations you have for your 20th year “make up party” are ROCKIN’!! I’m not sure how long I’ve been with you, but it’s been a long, wonderful time!
Thank you for all you do!
PS I love the Big Sur update! — Carri Keaton (USA) on Book Collector
January 01, 2021
Happy New Year!!
I'm starting off 2021 with a custom bookcase wall being fitted and can't wait to use your program to organise my humble collection! — Sarah Foote (United Kingdom) on Book Collector
January 01, 2021
Does exactly what I need. — Sean Mortensen on CLZ Books
December 30, 2020
My hone book library
So happy to be a part of the CLZ world wide family. Your team has made my life a little easier by helping me manage my home book library. May the new year bring all of you good health and happiness. Happy New Year! — Katherine Mackenzie (USA) on Book Collector
December 30, 2020
Happy 20th anniversary
Many congratulations on your 20th anniversary, it is not many start up companies that survive 20 years. Pass on my appreciation to all your team who have supported me over the years. I am not quite your first user but I think I signed up for Book Collector before 2003/4. Your software has progressed and improved every year and I couldn’t collect books without the support of my database.
Stay safe and Happy New Year — Pat Roberts (United Kingdom) on Book Collector
December 30, 2020
Very complete
Easy to use, great support for site, very complete manner to list books. Would recommend getting both phone and web version and sync between the two on the cloud. — John Woodworth on CLZ Books
December 21, 2020
If you have a huge book collection, this app will help!
It’s been less than one full day since I downloaded this on my phone and input about 250 of my books. The scanner/database worked for about 90% of those, and the rest were pretty easy to enter manually. I still have about 1500 books to go, but I’m already very happy with this app and will be renewing/maintaining my subscription. — corvis9 on CLZ Books
December 09, 2020
The best
Don't look any further. This is it! — Rusty Wilson on CLZ Books
December 08, 2020
This app has completely changed the way I approach my books. Ever tool you could possibly need for identifying and cataloguing ones personal library all wrapped up in one succinct package. Also trying out the Movie and Music versions! — Grogu's Guncle on CLZ Books
December 08, 2020
Saved me hours on knowing which books I had. Now I can buy the ones I am missing and not the ones I have. — Sean Morris on CLZ Books
December 07, 2020
Very happy with their support
I love this App. I tend to forget what I’ve read, so it’s great to check back. I did have problems transferring to my new phone and found it difficult, but they were quick to help and yes I should have asked for help first which I didn’t. Anyway great App and absolute great SUPPORT. — Ivonie on CLZ Books
December 04, 2020
CLZ Books
Uso questa app da un anno. È LA applicazione per gestire una biblioteca ( migliaia di titoli). Potente e flessibile. Frequenti migliorie e un team di sviluppo disponibile ad accogliere suggerimenti. Inoltre un supporto attivo e veloce. Al rinnovo ho sottoscritto anche web connect. — Renato Degli Esposti on CLZ Books
December 03, 2020
This App has awesome support!
I purchased the CLZ Book App a few months ago. I have to say that they helped me upload my collection when I was having problems with the CSV file. Their support has been so wonderful. Just recently the App started crashing on me on my phone when I tried to edit a new entry to place it in a collection. I contacted support and they got back to me before the day was out. He asked me some questions and gave me a few things to try. Before I could even try those suggestions out, I got an email saying that they had found the bug and were submitting their solution to Apple. It was so nice to know that there was a real person on the other side of the App and not an automated message. I love this app, for it’s ease of entry and also for the support. I bought the full version and am very happy with it.
I am adding to my review just to say that I had a question about moving books from one collection to another so I emailed support. I got an answer back within 15 minutes and the directions were clear and concise. Support is amazing for this app. You can tell the owner/designer takes great pride in the app and in providing support. — Pippin414 on CLZ Books
December 01, 2020
Excellent support
Great apps and excellent support very helpful, I invite everyone to experience this wonderful database organizer. — Joseph Skaf on CLZ Books
November 30, 2020
Best book cataloguing software I’ve used!
I tried 3-4 other book cataloging apps before I found CLZ and it’s computer based sister Book Connect, but all those others had their limitations and seeming to be aimed at novels. I needed a serious app to catalogue my very late research and academic library and this was it. I now have over 3000 books catalogued and add every new book before putting it on my shelves. It does not take long to learn how to use this app and customer support is excellent with replies often coming back in minutes. I log all my books with Book Connect on my desktop and easily sync to CLZ on my mobile. Have you ever been in a nook shop and wondered if you had a particular title? You either buy it and get home to find it is a dupe or don’t buy it, get home and kick yourself because you didn’t have it. CLZ prevents this and if it stops you buying one dupe a year it has paid for itself. Shopping online for titles? Check if you have the title with Book Connect on your computer. I love it and have recommended it to loads of my friends. — cant see the light on CLZ Books
November 26, 2020
Working perfectly
We followed your instructions exactly and IT WORKED!!!
Our program is working perfectly.
Thank you for the fast answer, we love Collectorz and specially the support you offer. — Jim Stewart (USA) on Book Collector
November 25, 2020
Great App...Great Support (if needed)
I’ve used Book Collector ( and Movie Collector) for many years. Great product on both the Apple Mac OS and IOS. Anytime I’ve had a question, my email is replied to within 3 hours. Great product. Great support. Great people behind both. Highly recommend. — MacBimmer on CLZ Books
November 22, 2020
Even has all my medical textbooks!! — Kevin Ibach on CLZ Books
November 22, 2020
Cataloging app
Effective book cataloguing app. — Jason Whyte on CLZ Books
November 17, 2020
My books organised
Easy to use and organise books. Love that it has a gesture for wishlist for future purchases. — Rebecca Quarton on CLZ Books
November 16, 2020
Easy to use
Easy to use and I can create separate data files for each person in the family. — Jim Payne on CLZ Books
November 15, 2020
Stable and Mature Product
The app was able to easily read bar codes from the last 20 years. Took a little longer with 30-40 year old books. A lot of books had UPC codes and the app easily identifies them. ISBN searches were a breeze. That I could add cover pictures was great. Only complaint: the title search engine is weak. One letter mistake and it couldn’t find a book - “if” instead of “of”. The I and the O are next to each other on my iPhone. But overall I was able to catalogue 99.9% of my more than 1000 books! — The Nomad Reader on CLZ Books
November 07, 2020
Love it
Pretty good. I use this for books & graphic novels. — Justin Howard Query on CLZ Books
November 05, 2020
Great app for people that have a lot of books to manage. — Victor Almeida on CLZ Books
November 05, 2020
Keeps getting better
Great app for keeping track of books including ebooks., easy to use and keep track across all devices. This app keeps getting better, regular updates and improvments. — Richard Davies on CLZ Books

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