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CLZ Books Mobile

v10.2: Automatic book values and retail prices

Apr 07, 2025

Live today: a huge v10.2 update for your CLZ Books mobile app, with one big new feature:

Automatic book values

You can now get get values for your books from CLZ Core, based on average prices on various online used book stores. Values are automatically filled in when you Add Books from Core.

To get values for your existing books, use Update Values from the menu.
You can also use this, e.g. weekly, to get updates for the values.

Update Values in menu:

Update Values Report:

The book values are shown in the book details screen, near the top.

You can edit value related fields on the new “Value” tab in the Edit Book screen:

The Value is also shown in the List View:

Finally, view value statistics and most valuable book lists in the Statistics screen:

Other changes:

  • The old “Current Value” field has been renamed to “My Value” and lets you either OVERRIDE the automatically provided value. Or just fill in a value for books that did not get an automatic value.
  • Get automatic retail prices in the Retail Price field (previously named “Cover Price”).
  • Optionally use the Retail Price as a “fallback value”, when an automatic Value is not available.
  • Sort your book list by Value

What to expect for your book collection?

The values are based on average selling prices of books on several used book sites on the internet. This system is purely based on ISBN lookups and average ALL prices for the same ISBN.

This means that the system does not take into account the condition and completeness of your copy. The value will be “just” an average of all available copies.
Also: with close to 40 million books in our CLZ Core database, we will not be able to provide a value for all books in your collection. In particular, books without ISBN will not get values.

Currently, our Core and Cloud statistics show that CLZ Books users will get a value for around 83% of their books, on average.
Your mileage may vary of course. For example, if you own mostly mainstream US books with ISBN, your percentage may be closer to 90%. On the other hand, if you own mostly antique books, or only books in the Polish language, your coverage will probably be much lower.

The coverage of books with a value may slightly improve over time, as we are still gathering value information for less popular books.

Important: getting values from Core requires an actual subscription for the app

Yep, Values from Core is the first “premium” feature for CLZ Books!
To use the feature, you need to have an actual subscription for the app. If you are still using the app in “grandfathered status”, you will not have access to the values feature.

The solution is simple though 🙂 Start subscribing to the app today.
Just open the menu, then tap the “Subscribe Now” link under “Subscription Status”.

Got any questions? Check the manual!

We’ve updated the manual with instructions and an FAQ. Check it out:
CLZ Books iOS / CLZ Books Android


Recent changes

v10.2.3: Fix for Stats and unrecognized ISBN screen Sep 09, 2025 v10.2.4: Fixed an issue in the Edit Book screen Sep 02, 2025 v10.2.2: Various fixes and improvements Aug 29, 2025 v10.2.3: Sync: More robust image downloading and some fixes Aug 26, 2025 v10.2.2: Various fixes Jul 28, 2025 v10.2: Automatic book values and retail prices Apr 07, 2025 Coming up, CLZ Books 10.2: Automatic book pricing / values Mar 16, 2025 v10.1.5: Collection tabs were invisible Mar 06, 2025 v10.1.4: A couple of fixes Mar 06, 2025 v10.1.3: Optimized startup process and faster syncing Mar 05, 2025 v10.1: Security update Feb 26, 2025 v10.0.4: ISBN queue was missing on some iPhone SE devices Feb 05, 2025 v10.0.4: Edge-to-edge support and bug fixes Feb 03, 2025 v10.0.3: Maintenance build Jan 28, 2025 v10.0.2: Add Books: ISBN: Fixed a problem when pasting ISBNs Nov 19, 2024 v10.0.3: Fixed some crashes and problems in the Add Books screen Nov 18, 2024 v10.0.2: Pasting of ISBNs now possible on “Type ISBN” tab Nov 15, 2024 v10.0: Read ISBN numbers with OCR! Nov 14, 2024 Sneak Preview: CLZ Books 10.0 – Add books by reading ISBN numbers with OCR Nov 08, 2024 [Android] v9.4.4: Recommended update with stability fixes Nov 05, 2024 [Android] v9.4.3: “Add Manually” screen didn’t show all tabs Oct 25, 2024 [Android] v9.4.2: Various fixes / a tweak to the app icon Oct 24, 2024 v9.4: New app icon to fit our new company name and logo Oct 12, 2024 v9.3: Several improvements and fixes Sep 27, 2024 v9.2.5: Fixed a crop-bug in the Edit screen Sep 03, 2024

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