Catalog your books on iOS or Android
Download a free trial version:

Catalog your book collection on your iPhone or iPad

  • Easily add books to your database:
    • scan ISBN barcodes with your device camera
    • or search by author and title.
  • Auto-download author, title, plot, cover art & more.
  • Use the free CLZ Cloud for backups and syncing.

Download a free trial version

or just open the App Store on your device
and search for "CLZ BOOKS"

The free trial is limited to 100 books.
Unlock to unlimited for US $15 (In-App purchase).

Browse your book list in various layouts

  • Use the List View with titles and main info
  • or browse cover images in the Cover Wall view
  • Check full details in your preferred skin
  • Optimized layouts for iPad and iPhone

Sort and search your book database

  • Scroll through in your books in one "flat list"...
  • or group them into folders, e.g. by Author or Genre
  • Order your list by Author, Title or Year
  • Use the Quick Search box to find a specific book

Easily add books to your database by ISBN or title

  • Add books by scanning ISBNs:
    • Scan book ISBNs with your device camera...
    • and have your book instantly recognized
  • Or search our online book database by author and title:
    • Enter the author and/or title to search...
    • then pick the correct book from the results

Automatically retrieve full book data and images

  • Author, Title, ISBN, Publisher, Publication Date
  • Genre and Subjects, Number of pages
  • Format, Plots summary, LoC Classification
  • Dewey and Cover images

Customize your book entries using the Edit screen

  • Modify book properties (like title, format, etc..)
  • Create your own genre and tag classification
  • Track your "Read It" status and your wish list
  • Enter purchase info, your rating and notes

Use the free CLZ Cloud system for data backups, syncing and sharing

  • Backup your collection data in the free CLZ Cloud
  • Sync data between devices, e.g. iPhone and iPad
  • Browse your list online on the free CLZ Cloud site
  • Share your public cloud link with friends & family

Transfer data to and from the Book Collector desktop software

  • Already own the Book Collector software for PC or Mac?
  • Then seamlessly sync your data to this CLZ Books app for iOS
  • Add books and edit entries on your mobile app
  • And sync the changes back to your desktop database


Endlich eine Überblick über meine Bücher!
October 8, 2016
“Bietet alles was ich brauche um einen Überblick über meine Büchersammlung zu erhalten.” — Anjubon
Great app on all platforms
October 7, 2016
“Now even better with the scanner!” — acass51
September 30, 2016
“I love this application. Whether you have a book collection you want to want to catalog or just want to keep track of what you have read you can't beat it. Just scan the ISBN number and the app pulls in a ton on info on the book. You can create folders if you choose. Extremely useful.” — Wilfred the Barbarian
CLZ Books
September 30, 2016
“We have an extensive collection of over two thousand cookery books. I have been searching for a way to catalogue these books for a number of years. What a revelation using CLZ app, having grappled with academic databases I was wary of the claims of all the different databases in the market place. I started using the CLZ app for the iPad and I became productive immediately and managed to catalogue 50 books in the first hour of using the app. Congratulation to CLZ team on a first class product that easily exceeded my expectations.” — alanscuba
CLZ Apps
September 28, 2016
“I have used the Collectorz software for many years on my PC and MAC. The use of their iPhone app has made the software even more valuable! I love knowing what I have in my library, or who has borrowed it right on my iPhone. I also love the fact that I can see my collection of music and movies in the palm of my hand. Good job guys! Keep up the good work!” — K DaBear
A Dream Come True! *****
September 28, 2016
“I hesitated, there was only one review for the current version, and that was negative. I looked at older reviews, they were mostly positive but some noted significant limitations. E.g.: can't sort by title, hidden subscription cost, etc. But I got the limited version anyway and it looked good, very good. From the revision history the developer seems quite active. So I put my money down, hoping the problems would get sorted out eventually. . I've only had it for 24 hours but I can already see it was a good decision. All the problems noted in the old reviews seem to be fixed already (or maybe people hadn't known the features were there). You can even set a default location so that you can scan all the books in the dining room, for instance, and they will automagically have DR (or whatever you want to name it) as the location! . Caution: Don't forget to change the default location when you move to a different room - changing the location manually one book a a time is tedious. Maybe there's a batch change option, but I haven't found it yet.” — [Hand Shake]
Great library
September 28, 2016
“Great for keeping a library organized.” — Photo_bomb136
Very good
September 26, 2016
“Hele goede app die synchroniseert op alle apparaten en via de barcodescanner supereenvoudig invoert.” — sjors & sjimmie
Fantastic app
September 25, 2016
“This is a great app for looking after a book collection. It is quick and easy to add most books (simply scan the ISBN or type in the book title).” — Specul8
Ottima app
September 24, 2016
“App veramente utile per la gestione della propria collezione di libri. Ricco database con photo, informazioni complete, facile da usare.” — Culebradiromagna

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