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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 phones and tablets

  • Access your collection on the go
  • Install on multiple phones/tablets
  • All data stored on your device
  • Sync data to CLZ Cloud (optional)
  • Built-in camera barcode scanner
subscription includes all
app updates + online services

Desktop software

Desktop software for PCs & Macs

  • For advanced computer users
  • Install on your own PC or Mac
  • All data stored on your computer
  • Sync data to CLZ Cloud (optional)
  • Free CLZ Barry barcode scanner app
subscription includes all
software updates + online services


Web-app, fully cloud-based

  • Easy to use, easy to manage
  • Login and use from any computer
  • All data stored in the CLZ Cloud
  • Automatic updates & backups
  • Free CLZ Barry barcode scanner app
subscription includes all
software updates + online services

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

Great product for book collector. If you got books this is the best way to record them. I use it across an iPhone, iPad, MacBook, and Mac desktop. Seamless. The flexibility of the program is so great that you can record your books in a fashion that highlights what is important to you. You are not pinned down to a specific method that some geek programer in a back room who never owned a book thinks you should use to record your collections. It has flexibility.
Further and just as important or maybe more important is the customer service. I have had this product for 5-10 years and have consistently received the best customer service in the business. Every email is answered. First they understand your question and then they answer it. Other software customer service people do not understand the question, and then give you an answer from some script that the mother ship office directs them to use regardless of whether it answers the question or not. Not so here. These guys are terrific.
The best in the business. Buy the product.
— mathiasuppercove (USA) on September 28, 2019

Reviews from customers

November 13, 2019
Very user friendly
So far I am loving the app. It is very user friendly and has helped me get my child's books more organized! — Stephanie LeTourneau on CLZ Books
November 06, 2019
Trop bonne applie!!!! — Bruno Girard on CLZ Books
November 06, 2019
LOVE this app!
I love love LOVE this app! — Alan Williams on CLZ Books
November 05, 2019
Great app
Great way to catalogue and track your books! — Ahren Rhoden on CLZ Books
November 05, 2019
Great tool for the book lover!
Great way to keep track of your books. It keeps me from buying any twice. — Cindy Frederick on CLZ Books
November 05, 2019
CLZ Books
Having taken the time to evaluate this app I can honestly say it is a great way to keep track of your ebooks. Sure it is laborious entering the details if like myself you have thousands of books but believe me it is worth the effort. I love the fact that I can open the book details and see when I purchased it and when I last read it. The support you get is first class, any problems just email and you get a fast response. Highly recommend this app for all bookworms out there like myself. — Kerig Girl on CLZ Books
November 02, 2019
Love it
Cloud access useful for when buying new books and checking collection. — Conspiring Cynic on CLZ Books
November 02, 2019
Love this app
So many ways to customize the book entries and it's very easy to use. I was able to easily upload my book list from another app with the free trial to Book Connect. I then purchased a subscription to Book Connect, accessing it on the computer offers much better functionality. I told my mom about this and she's using it now too. — Marla B on CLZ Books
October 31, 2019
Immensely (and quickly) helpful with problems and queries. — Bill McCann on CLZ Books
October 31, 2019
The best book organization and book database app on Android
Scanning is easy and fast. It also retrieves the exact edition of your book so your database is accurate as possible. This is a must-have for those who have hundreds of books in their home library like me. I really appreciate that when the app shifted to a subscription-based app, early adopters like me who paid for the app still receive updates for the app. Thank you so much CLZ team! — Shane Comota on CLZ Books
October 30, 2019
Fantastic support
I needed to change, the app I was using to record my reading history was letting me down badly and with nearly 1500 books recorded I had to find a way of transferring my records over into a new app. Alwin at CLZ certainly came up trumps, taking me (a very un-techie silver surfer) through the process step by step. This app really works, is very user friendly and seems to do the job I want it to do. Highly recommended. — Carolintheforest on CLZ Books
October 28, 2019
The absolute best product I have ever bought
I have had Collectorz for several years with a collection over 2,600 books. This app is superb in enabling me to manage my books and all details as to the seller, price, edition and series etc. I also have it on my iPhone and check the app before I purchase any further books. The help component cannot be faulted and even living in Australia any query is answered almost immediately and followed up till I have sorted any it out. This is the best purchase I have ever made and for a book nut it is highly recommended to anyone with a collection, small or large. My thanks to all the staff. — Phil Sutton (Australia) on Book Collector
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 23, 2019
Easy way to keep track of my collection. Will be a big help at future book sales. — Michael Cody on CLZ Books
October 21, 2019
Well done!
Perfect and easy. — James Vernon on CLZ Books
October 20, 2019
Love these apps
These are great apps. I love em. But it would be pretty cool to maybe combine them into one app as well. So that there is one app for all of it instead individuals. — Princess Pepper 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
October 18, 2019
Book Collector and CLZ
We subscribed to Book Collector over 15 years ago and had very good support from the company. We have since switched over to CLZ because our desktop computers have aged with us. We have had very prompt and succinct responses from their President, Alwin Hoogerdijk regarding our questions and concerns. We are very excited about the new App, since we can now use our iPad camera to catch each ISBN number that then gives you all the information you need and a beautiful cover picture for each book. We will finally be able to complete our collection without duplication of titles, and locate each volume quickly for reference, all in the palm of our hands.Thanks Alwin! — Wycinanki on CLZ Books
October 16, 2019
Love it
Excellent app for keeping track of your books, especially if like me you have bookcases all across the house. Ideal for looking up what you have from which author and if you have that title. — Paul Goodison on CLZ Books
October 14, 2019
The quality of your work
Almost every time I open Book connect, I find improvements and new features. Just want to express my appreciation, as a steady user, for the quality of your work.
Many thanks and keep it up ! — Guy Dauphinais (Canada) on Book Collector
October 14, 2019
Awesome for keeping track of my books. — Joseph Duffy on CLZ Books
October 13, 2019
Pour ne plus jamais acheter de doubles, intuitif, facile et rapide. — olivier bequet on CLZ Books
October 11, 2019
DE oplossing om mijn boekenverzameling overzichtelijk te houden
Al heel lang verzamel ik pop-up boeken..Eerst wist ik nog wel welke ik al had en welke niet, maar toen ik dubbele ging kopen maakte ik in Excel een bestandje en printte dat uit en nam dat elke keer mee....aangevuld met handgeschreven informatie. Maar toen ontdekte ik Collectorz.com, echt geweldig!!!!!!
Alle boeken staan er (bijna) en nu kan ik zelfs met mijn telefoon in de winkel zien of ik een boek al heb door het isbn te scannen. Ontzettend blij ben ik er mee , het is heel gebruiksvriendelijk en jullie support is ook snel en adequaat, als het nodig is. — Anneke Eggink (Netherlands) on Book Collector
October 11, 2019
App is great
Support very quick and efficient. I used to use the programme years ago but find it has proved greatly over the years. Can certainly recommend it. — Howard Lawless on CLZ Books
October 10, 2019
CLZ books works excellent!
I have been using CLZ music since a year or so and decided to try also CLZ books. Despite an initial issues with synchronization (solved by the excellent customer support provided by the vendor) the app works very well and I am looking forward to continue to catalogue my books collection books in the app. — Eriksve on CLZ Books
October 08, 2019
Utterly first class
Your app and backup are utterly first class. In fact so professional I am 100% supportive even though its just my home library of 2000 ish books it is wonderful to use and explore. — Mike waterfield (USA) on Book Collector
October 07, 2019
The best
I’ve been slowly editing my CLZ Database of books. Correcting typos, retaking photos, adding my own thoughts, removing some genres and subjects.
I must say this is the best database in the market. — Paul Morrow on CLZ Books
October 07, 2019
Perfect app, makes things so much easier! — Rob Conley on CLZ Books
October 06, 2019
Just what I was after. — Philip Spedding on CLZ Books
October 05, 2019
I really like this app
It keeps track of the books I've read in an organized fashion. I can add my comments, rate, and date the books when I finish them. I recently had some difficulty logging into my app so I contacted Support. They were very helpful and stayed in contact with me until we worked out my problem. I highly recommend this app. — Jan Adamson on CLZ Books

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