The RDev Calculator is a standard calculator with some advanced features:
* Display is highly customizable with pre built themes, custom theme options, button text options, main display size options, and history text options
* 'Standard buttons only' option allows for larger buttons
* Status Display shows what calculations were used for the displayed result
* Comma Formatting or Digit Grouping
* Expression Mode
* Percent Button
* Currently displayed item is editable by tapping the display or using arrow keys
* Programmable Function Button (defaults to "X + 15%" for a tip)
* Haptic Feedback
* Results and expressions can be copied to the clipboard
* Ability to keep screen on while working in the calculator
* Decimal Precision setting
* Results history showing the last 10 results
* Results larger than can be shown in the main display can be viewed in results history or edit mode
* Memory and history is saved between app instances
* App can be saved to SD Card on devices running Android 2.2 or greater
Custom theme options give the ability to choose background images, colors, and margins for button groups and the display.
History results screen now has color and text size options.
Main display size, text size, and the percentage the status bar takes is now customizable.
Theme default colors and text sizes have been updated.
More colors choices were added.
Menu button toggles action bar for 3.x+ devices (if the menu button exists).
General bug fixes.