- Added an option to show a two-line display for use in RPN mode.
- Added two new calculator themes.
- Now use a comma or a dot as the thousands separator, when it's set to be a character we can't display.
- Changed the behaviour of percentage and delta percentage to match PCalc on Mac OS X.
- Fixed a problem with very large and small numbers not causing an overflow.
- Fixed a problem with first thousands separator sometimes not being displayed.
- Fixed a problem displaying the correct number of decimal places for some numbers.
- Added support for switchable button layouts - choose from many different horizontal and vertical layouts.
- Added support for calculator themes - comes with three new optional appearances with color-coded buttons.
- Added an option to show trailing zeros up to a fixed number of decimal places.
- Added an option to make the "2nd" button switch off automatically after the next button press.
- New horizontal mode layout with improved button placement and the number buttons on the right-hand side.
- Double height equals/enter button in all the default layouts.
- RPN mode is now a separate switch in the settings.
- You can now email the whole stack when in RPN mode.
- Made value text larger in constants and conversions section.
- Made the dot and comma larger in the "Easier To Read Digits" option.
- Changed "Exp" button to automatically insert a 1 before the exponent if no numbers entered.
- Percentage key now works more like HP calculators in RPN mode.
- Cube root now supports negative numbers.
- Factorial is now calculated using the gamma function.
- Added multiple undo and redo. Flick the LCD to the right on to undo, flick to the left to redo.
- You can now change the colors of the LCD display and digits.
- Made the operator buttons more readable.
- Reversed the order of the operator buttons to match other calculators.
- More improvements to the RPN mode.
- Fixed a problem displaying large hex numbers on the tape.
- You can now email the contents of the tape and the display.
- Changed the RPN Drop behaviour to match HP calculators.
- Rearranged layout slightly to show "Del" button in RPN mode.
- Added some fuel efficiency conversions.
- Added display of ASCII / UTF-8 / UTF-16 values.
- Added a Help section to the Settings.
- Now correctly disable the "8" button in octal mode.
- Fixed the RPN "Roll" button in horizontal mode.
- Fixed a couple of memory leaks.
- First release for iPhone.