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

Catalog your books on your Android phone or tablet

  • 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 Play 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 Android Tablet, Phablet and Android Phone

Pick the look of your app: CLZ Books comes with a Dark Skin and a Light Skin

  • Choose whichever you like best
  • Dark Skin with Clear Dark template:
  • Or choose a lighter style with a brighter template
  • Light Skin with Clear Light template:

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 recognised
  • 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. Android Phone and Android Tablet
  • 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 Android
  • Add books and edit entries on your mobile app
  • And sync the changes back to your desktop database


February 15, 2017
“Been using it for years. My book buddy and I can check which books we have in order to avoid duplicates. Also use it at the bookstore and library to see if I have it or read it.” — Lucy Looney
So much better
February 12, 2017
“I use to use BookCat - this is better since I can sync across many devices.” — Allyson Luders
Great app
February 10, 2017
“Beats doing dewey decimal by hand.” — Ted Swanson
Too much like fun!
February 7, 2017
“Once I started it is hard to stop.” — Bookman Bob
February 5, 2017
“Does what it says on the Tin!” — Sujoy Biswas
CLZ Books
February 3, 2017
“Effective way to edit this particular database.” — David Arrowsmith
Perfect list
February 2, 2017
“No more buying books I've already read!” — Joy Mcnulty
January 29, 2017
“It's been working great for a few years now. My only comment would be the plethora of options available means I can spend even more time in my library making adjustments.” — A Google user
It's awesome
January 28, 2017
“I've gotten obsessive about organizing my books, and this app is perfect.” — Michael Sheridan
CLZ Books
January 23, 2017
“Best catalog app out there.” — Ruthann Sutton

Hear from more delighted customers