Support for iOS 15.
Support for iPadOS 15.
Support for iPad mini (6th generation).
Additional usability improvements and bug fixes.

This update contains stability improvements and bug fixes.

Support for iOS 11.
Support for iPhone X.

This update contains stability improvements and bug fixes.

Updates for iOS 10.

Added German and Korean translations.
Accessibility improvements.

This app is optimized for iPhone 5.
Accessibility improvements.

Added Portuguese translations for Brazil and Portugal.

Additional stability and performance improvements.
Usability improvements.

Additional stability and performance improvements.
Usability improvements.

Additional stability and performance improvements.

Added full support of iPad.

Added full support of iPad.

Added Japanese and Spanish translations.
New high-resolution graphics for iPhone 4.
Updates for iOS 4.

Added French and Simplified Chinese translations.

Two additional ways to answer problems! Fill in the comparator (less than, greater than or equals).  Fill in the operator (plus, minus, etc.)
Better descriptions are now used by the assistants (number line, blocks, etc.)

New Input category in settings.  Control the layout of the keypad, or even use the new multiple choice interface to enter answers.
Now incorporates the use of the Mersenne Twister algorithm for better random number values.

Fixed a problem with a particular division fact when "correct immediately" was enabled.

- Optimized loading of sounds
- Bug fixes