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New Features

  • Recover from Trash
    • Now when you delete a Card, a Deck, or even an entire Box, they go into the Trash instead of getting deleted immediately.
    • You can open the Trash and recover the items (available in the Full Edition, not CE).
    • Items you leave in the Trash will be automatically deleted after 32 days (so you always have at least a month before they are permanently deleted.)
  • Flags for Entries
    • Similar to how you can Mark a Deck or a Card, now you can Flag any Entries.
    • Whether to mark imprecise, approximate values, or to just denote special Entries, now you have an additional tool to organize your data.


  • more consistent context menus
    • Look Up, Speak, etc.
  • more robust file operations
    • no more “don’t have pemission” errors with AccessSecuredURL


  • Side-by-Side view: multi-line text was not showing

updated 2024/03/15


Kase 4.2 will be realizing a major part of my dream that started 10 years ago...

A number is usualy not just a number. It is often a quantity associated with a unit. Without the unit, it is a figure floating in a vague dimension. But when paired with a unit, the number becomes a measurement carrying a concrete value.

Kase 4.2 helps you keep track of numbers with units.

Open letter to all numbers

Here is an open letter to all numbers:

updated 2024/03/13
  • 2024/02/02
  • 2024/02/01

4 = 4.0 + 0.1

Kase 4.0 was a huge update. It was so big that compiling the list of changes was almost as big a task as making the app itself...

Inevitably, bugs got in. Especially when we are supporting three major releases of iOS/iPadOS (15, 16, and 17), and Apple likes changing things around with little to no documentations... (e.g. SF Symbols names, hi, what are you now?[^sfs])

4.1 is what 4.0 should have been, if i had more time...


But 4.1 is much more than bug fixes. It is a very important release on its own:

(last updated: 2022/04/26)

Kase 3 was designed for iOS1 13, and it has been updated numerous times to work well with later releases of iOS 13 and 14.

Kase 4 will be the recommended version of Kase for iOS 15 and greater. This post will document how the older Kase 3 works under iOS 15.


  1. iOS here refers to both iOS and iPadOS,