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


Quite useful
23 August, 2016
“First and foremost, many thanks for the app. I find it quite useful, particularly when I'm shopping and am able to verify via my phone/the app if I already have a particular title in my collection!” — Kim Wall
Tidy app, easy to use
23 August, 2016
“This is a neat app. Easy to use keeping thing updated across my devices. Adding new books is quick by scanning or searching. ” — FunkyDee
17 August, 2016
“The app works really well and is very intuitive to use. I have a significant book collection and it has prevented me from buying duplicates and allowed me to purchase a book in better condition or a different edition. It is an essential app for any book collector.” — Listenip
Great App
16 August, 2016
“Great for tracking the thousands of books I have. Works great with Book Connector.” — BofhUsul
God bokdatabase
09 August, 2016
“Meget god dekning av norske bøker. Samspillet mellom PC og iPad dekkes godt av cloud. Fungerer godt for meg.” — Stig Brathaug
Rapide, efficace et fonctionelle
31 July, 2016
“Ceci est de loin la meilleure application que j'ai trouvée pour indexer ma collection de livres. D'abord elle scanne les codes barre tres rapidement, l'application ne crashe pas (comme d'autres), l'app est rapide et ne ralebtit pas avec le nombre de livres (<1000), meme si toutes entrées ne sont entierement correctes, la plupart le sont. La reactivité est top et le design acceptable.” — Tusca
Excellent, and developing continually
31 July, 2016
“I have used this for some years and recommend it to others.” — Leighton008
Great app
25 July, 2016
“Keep it so i always have a list of books ive read and don't pick up the wrong book! It s great for that.” — The Boobala
This is a "must have"!
23 July, 2016
“I work in an old fashioned book store. A customer told me about this app so I had to check it out. There's a computer version & an iPhone/pad version. I'm not near a computer often but always have my iPhone w/me. I was able to add older books. If a picture of the cover doesn't load...I just took a picture w/my phone & edited into the book info. The customer service was wonderful. I didn't realize there was the computer version & a phone version. They refunded me so I could purchase the app. I travel a bit. Now I will never be at a shop w/a book on my hand wondering if I already had it. And if I ever had a fire, I would use this app for insurance purposes. I've already looked up a books in my personal collection for customers at the store. is good!” — Hatrick81
A joy to use
20 July, 2016
“I downloaded a dozen or so book cataloging apps to try them out. Mostly, they went from bad to worse. CLZ Books was superlative: user-friendly, smart, fast, and intuitive. Keep up the good work!” — Sistah Eve

Hear from more delighted customers