- Added support for hardware keyboards
- Added an option for haptic feedback in the main menu

* Revert some symbol changes as a result of user feedback.
* Fix fonts on Android devices

Thank you for your valuable feedback!

- The "LOGx" button was incorrectly labeled "LOGy". Fixed.

- Added support for all current iPhone screen sizes and shapes
- Updated the keyboard sounds to match the current iOS sounds
- Now you can adjust the sound volume with the standard volume up/down buttons instead of a slider in the settings menu
- Added scientific and engineering notation
- Improved fixed notation: if a number is too big or too small to display, it's automatically displayed using scientific notation

- Native support for the iPhone 6 and 6 Plus screen resolutions
- Fixes an incompatibility with iOS 9

- Updated for iOS 7
- New "flat" icon to match iOS 7's design language

- Added support for the iPhone 5's new screen size
- Added copy and paste functions (via the "2nd" menu)

(Please note that this version requires iOS 4.3 or newer.)

- Added a slider to control the volume of the keyboard sound effect
- Fixed a graphics incompatibility with iOS 5.1

- High-resolution graphics for the Retina Display
- Commas
- "Fixed" notation
- Adjustable number of significant digits
- Setting to use commas for decimal points