9.4: Fixed issue with file association.
9.3: Updated to target Android SDK 35.
9.2: Fixed a bug with file association for .cf files.
9.1: Allow entry of formulas in Linear Solver without having to insert *'s between coefficient and variable name.
9.0: Updated calculator tool.
8.9: Updated to target Android SDK 34.
8.8: Updated to target Android SDK 33.
8.7: Bug fix.
8.6: Added min(), max(), and avg() functions which each take two values.

Fixed bug with formulas containing single letter variable names.

Bug fixes

Added an option on the main page menu to rate and review the app.

Added the ability to email and open formula group .cf files.

Added the ability to import and export formula groups

Fixed issues with keyboard getting in the way on compute page.

Improved user interface. Added support for using built-in functions.