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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

* Parentheses

* 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

What's New in the Latest Version 2.1