What's new in CLZ Books?
Fixed:
- Slight tweaks to height of certain popups for foldable devices
- Crashes could occur on older devices while syncing/adding items
Fixed:
- Custom Fields: Fixed List/Fixed Button Bar: It wasn’t possible to add more than 1 value
New:
- New layouts for unfolded foldable devices
- Improved support for tablets and desktop-style windowed mode
- Predictive Back gesture support throughout the app
Fixed:
- Add Read Event: Switching off “Set End Date to Today” didn’t always work correctly
- Pre-fill: changes to the field order were not saved
- Pre-fill: Custom Field data wasn’t saved to newly added entries
Fixed:
- The “Remove unused pick list items” option could crash the app
- Custom Field: Time now supports four-digit hours
- Custom Field folders were not remembered after restarting the app
- Custom Field Preview was not displayed correctly on smaller phones
- The keyboard could not be dismissed when adding or editing a Custom Field
- Some users received too many “Please rate this app” popups
– After updating to v11 books could be duplicated
– Main screen: Thumbnail size resets after a restart
– Tags containing an ‘&’ could display as ‘&’ after a downsync
– Could not dismiss keyboard when adding a Custom Field
This is it, the big v11.0 update for your CLZ Books app. Version 11 is a huge step forward in the customizability of the app. And I am not talking about tweaking the look and feel here, like layout, colors, fonts, etc… No… this time we are giving you the ability to actually customize the database itself, with your own “Custom Fields“!
The Custom Fields feature will let you create your own data fields, to catalog any information for which the app does not have a built-in field. You can create text fields, number fields, date fields, Yes/No toggles, pick list fields and much more.
All fields you create can be edited on a special Custom Fields tab of the Edit Book screen. The entered data will nicely appear in a special section on the book details page. And of course, you will be able to use the fields like any built-in fields, that is, sort on them, use pick list, date and toggle fields as folders, search your text fields, etc..
Yes, it has been quite a while since we released updates for the CLZ mobile app. But there is a good reason for that. Most of the CLZ team has been working on our biggest update since years. And its release is very close now!
So here’s a quick heads-up for all users of our CLZ mobile apps: Within 2 weeks, we are going to release major version 11.0 updates for all 5 apps (CLZ Comics, CLZ Movies, CLZ Books, CLZ Music and CLZ Games).
In this version 11, we will introduce an important new CLZ feature, bringing yet another way to customize the app to fit your wants and needs:
Custom Fields: create your own data fields!
The Custom Fields feature will let you create your own data fields, to catalog any information for which the app does not have a built-in field.
You will be able to use the fields like any built-in fields, that is, sort on them, use custom pick list fields as folders, sync the data to CLZ Cloud, print or export list with the custom fields included, etc…
And, if you are also subscribed to the CLZ Web cloud-based software for your computer: the Custom Fields are available there too, so you can sync your created fields and their data between Web and mobile!
Two nice improvements for CLZ Web in one go. First, you can now add a cover thumbnail as a column in your List View. Next to that, we spent some time improving the keyboard support in the Edit screen.
On top of that, we’ve now also added the possibility to install CLZ Web “as an app” to your computer.
Through the years, the Edit Book screen has evolved a lot. More and more fields were added, distributed over more and more tabs. And recently even more tabs got added for the new Custom Fields and My Images features.
So it’s time to make the amount of tabs more manageable and customizable, with two subtle changes to the Edit Book screen:
Another big update for your CLZ Books Web software today, which brings further ways to customize your book entries.
This updates adds a new My Images tab, that lets you add up to 5 extra images to each book entry! That is next to the existing customizable Front and Back cover. You can use it to store more images/photos of your collectibles, e.g. of the dust cover, the signature(s), interior art, etc..
Fixed:
- Sync with CLZ Cloud: Updates: Custom covers did not download correctly
- Sync screen could open when tapping Edit during image downloads
- Details view not fully visible in some cases
- “Downloading images” bar could appear when nothing was downloading
- Book template: eye icon showed as “Not Read” incorrectly with 1 read event
Here’s one suggested by one of our users: “why can’t we just click on a Genre or Subject in the book details and see all books in that category?”
That definitely makes sense, and it makes sense for other fields too! So today we’re releasing a new feature which makes it much easier to move through your collection straight from the details panel: Browsing and deepdiving into your collection just became a lot more fun!
While viewing a book, you can now click on many of the fields in the details panel to instantly find all books in your database that match that same author, illustrator, series, genre, and more.
Fixed:
- Further tweaks to the down-syncing from CLZ Cloud
- Book details page accidentally included the “Custom Fields” sections
- Add Books, Edit and Action buttons could not be used if images were still downloading in the background
New:
- More optimizations for down-syncing with CLZ Cloud
No new features here, but an important improvement to an existing one: the CLZ Cloud syncing. Our mobile developers Pim and Bernard have implemented three changes that will make the down-syncing of new items from the CLZ Cloud to your app a LOT faster!
- The syncing now down-syncs the *data* first, while queuing the *image* downloads. This will make the data sync super fast.
- Downloading the images is much quicker too, especially on fast connections, as it downloads multiple images at the same time.
- As soon as the data download has completed, you can close the Sync screen and start using the app. The image downloads will continue at the bottom of the main screen, prioritising images that are “in view”.
The improvement in speed will be most noticeable when re-downloading your complete CLZ Cloud database, e.g.
- After installing the app on a new device
- After removing and re-installing the app
- After Clearing the Database
However, even during normal use, e.g. when syncing between devices, or between the app and the CLZ Web software, you will find the down-syncing to be much faster than before.


Fixed for Android
- Setting to enable Subject downloads wasn’t working correctly
Fixed:
- Sorting on “Last Read” (still) didn’t work correctly (and wasn’t displayed correctly)
Fixed:
- Details panel: Data in the “Read” field wasn’t always displayed correctly
- Sorting on “Last Read” didn’t work correctly (and wasn’t displayed correctly)
Fixed:
- iPad: Edit Book: add/edit Read Event: the “Reading Status” dropdown wasn’t working
- iPad: Edit Book: the tabs didn’t display correctly
Today, another huge update for your CLZ Books mobile app, version 10.6. The update brings several new features and data fields that have been requested by our customers through the years:
- Track your Reading History, with multiple read sessions, each having Start and End Dates, Reading Status, Reading Progress and Reader fields.
- New dimension fields: Spine Thickness and Weight, delivered automatically from Core!
- Next to Book Condition, a new field for the Dust Cover Condition
- Place of Publication, plus Original Place of Publication
This is it, THE main feature release for 2026. A huge step forward in the customizability of the software. And I am not talking about tweaking the look and feel here, like layout, colors, fonts, etc… No… this time we are giving you the ability to actually customize the database itself!
Yep, today is the launch of the “Custom Fields” feature (previously known as “User Defined Fields”).
The Custom Fields feature will let you create your own data fields, to catalog any information for which the software does not have a built-in field. You can create text fields, number fields, date fields, Yes/No toggles, pick list fields and much more.
All fields you create can be edited on a special Custom Fields tab of the Edit screen and their data will nicely appear in a special section in the book details panel in the main screen. And of course, you will be able to use the fields like any built-in fields, use them as columns, sort on them, use pick list fields as folders, add the fields to printed list, exports, etc..
Are you ready for the next step in customizing your CLZ Web software?
Coming up next Monday:
Create your own Custom Fields!
The Custom Fields feature will let you create your own database fields, to catalog any information for which the software does not have a built-in field.
Fill in your custom fields on the special tab of the Edit screen and their data will nicely appear in a special section in the details panel in the main screen. And of course, you will be able to use the fields like any built-in fields, use them as columns, sort on them, use pick list fields as folders, add the fields to printed list, exports, etc..
Fixed:
- Crash: When a book couldn’t be located/selected on start-up or after editing the app could crash
- iPad: books sometimes wouldn’t be scrolled to after picking it from a search in your own collection
- Collection bar at the bottom could disappear on closing the sync screen
- Collection bar didn’t appear immediately when adding a new collection for the first time
This is going to be THE main feature for 2026: Custom Fields!
The Custom Fields feature will let you create your own data fields, to catalog any information for which the software does not have a built-in field.
All fields you create will appear on a special Custom Fields tab of the Edit screen. And of course, you will be able to use the fields like any built-in fields, use them as columns, sort on them, use custom pick list fields as folders, add the fields to printed list, exports, etc..
And once the Custom Fields feature has been released for both the Web software and mobile apps, you will be able to sync them back and forth too!
Manage your Custom Fields
Use the Custom Fields screen to manage your custom fields, that is, add new ones, remove them, rename them, etc…

Adding a new Custom Field:

Choose from a wide range of field types. Create simple text fields, number fields, currency fields, yes/no toggles, big text areas (like Notes), even pick list fields and multi-value pick list fields.
- Text
Single line text field (for max. 250 characters) - Textarea
Big text field (for lots more characters) - Toggle
Toggle between Yes and No - Number
Whole numbers only - Decimal
Whole number with 2 decimals - Currency
Monetary value as a whole number or with 2 decimals - Percentage
Percentage as a whole number or with 2 decimals - Weight
Weight as a whole number or with 2 decimals - Size
Dimensions as a whole number or with 2 decimals - Pick List
Pick a single value from dropdown with manageable list - Multi-Value Pick List
Checkbox multiple values from a manageable list - Fixed Button Bar
Choose one from max. 4 options - Fixed List
Choose one from a pre-defined fixed list of max. 20 options - Date
Date controller for full or partial date - Time
In hours and minutes

Fill in your Custom Fields using the special tab in the Edit screen

ETA ?
The Custom Fields feature is in the final phase for the CLZ Web web-based software. We will release it for Web first, then later on bring the same feature to the CLZ mobile apps, allowing full syncing of Custom Fields between the Web and mobile!
ETA for Web: Feb 2026. Then for mobile a few months later?
Again, this is going to be THE killer feature for 2026!
Fixed for iOS:
- The scroll position in the list could be wrong after searching in own collection and tapping a result from the suggestions
- Images view: Pinch to zoom in images view was broken
- Edit screen: tapping “next” or “previous” on the Links tab would crash the app