2.2

• Added a special low-light calculator theme, "Flynn".
• Added dozens of new unit conversions.
• You can now sort the units in the conversions section by name or by magnitude.
• Added a volume control for the key click sounds.
• Added an option to stop the "AC" button from clearing the memories.
• Added an option to show or hide the key popups.
• Added labels to the display on iPad in portrait mode.
• Moved the thousands separator option into the main settings section.
• Improved detection of overflow in Hex, Octal, and Binary modes.
• Improved speed of application switching on iOS 4.0.
• Various minor fixes and improvements.

2.1

• Added support for iOS 4.0 and fast app switching.
• Added support for the Retina display on the iPhone 4.
• Various minor fixes and improvements.

2.0.1

• Fixed a crash that could occur with the constants and conversions on iOS 4.0.

2.0

• Added support for the iPad.

1.9.3

• Fixed a problem with the currency conversions in some regions. Reload the rates if you still see problems.

1.9.2

• Added a brand new currency section to the unit conversions.
• Added "<< n" and ">> n" buttons to the programming layouts for shifting by an arbitrary number of bits.
• Fixed a problem with settings being reset occasionally.
• Fixed a problem with custom LCD colours not being saved.
• Changed the "Del" button to look like the standard iPhone backspace.
• Made the recent conversion swap buttons much easier to press.
• Various minor fixes and improvements.

1.9.1

• Added support for the standard "shake to undo" gesture.
• Added an option to stop the "AC" button from clearing the tape.
• Added an option to stop iPhones from vibrating on errors.
• Various minor fixes and improvements.

1.9

• Added a new calculator theme, "Flux".
• You can now customize the decimal and thousands separators in the advanced settings.
• You can now show thousands separators in the register, stack, and unit conversion sections.
• Added options to automatically copy and paste when PCalc is closed and reopened.
• When using multiple memories, the memory keys now highlight to show which memories have values stored in them.
• Gamma function now works on a wider range of inputs. †
• Improved performance and handling of low-memory situations. †
• Various minor fixes and improvements. †
• PCalc now requires iPhone OS 3.0 or later. †

You can now purchase all the extra features from the full version of PCalc from inside PCalc Lite. Buy them individually, or buy everything.

† Also in PCalc Lite 1.9

1.8.1

• Fixed a problem in 1.8 with calculator buttons not always taking presses. †
• Various minor fixes and improvements. †

† Also in PCalc Lite 1.8.1

1.8

• Now includes a coupon code to save $9 on buying PCalc for Mac OS X.
• You can now swipe up and down on the LCD screen to change the number of lines displayed.
• You can now separately set the number of lines displayed for the horizontal and vertical modes.
• You can now undo and redo calculations even after closing and reopening PCalc. †
• Added a mod operator as a 2nd function of the divide button.
• Added an option to set the lower value where scientific notation display starts.
• Improved support for VoiceOver. †
• Various minor fixes and improvements. †

† Also in PCalc Lite 1.8

1.7

• Faster startup! †
• Added three and four line display modes with full control over what's displayed on each line.
• Added an option to increase the number of available memories to ten.
• Added an option to stop the calculator rotating horizontally.
• Added an option to make the RPN behaviour match more modern calculators like the HP48.
• Added a "Last" button to the RPN layouts which pushes the previous value of X onto the stack.
• Added "SC", "CC", and "MC" buttons to separately clear the stack, calculation, and memories respectively.
• Added commands to copy the tape and RPN stack to the clipboard on iPhone OS 3.0.
• Added separate UK / US tablespoon and teaspoon units to the cooking conversions.
• Made the "Easier To Read" digit style actually easier to read. †
• Made calculator buttons easier to press. †
• Tidied up the settings.

† Also in PCalc Lite 1.7

1.6

• Added support for copy and paste on iPhone OS 3.0 - double-tap (or tap-and-hold) the LCD screen to copy the displayed value, or to paste in another one. †
• Added a new full-featured vertical layout, "Engineering", that includes all the functions from the horizontal equivalent - no need to rotate anymore.
• Added a new layout, "Programming", in both horizontal and vertical flavors, geared towards hex, octal, and binary calculations.
• Added support for regions that use a quote as the thousands separator. †
• Fixed a display problem with the tape in hex mode.
• Various fixes for iPhone OS 3.0. †

† Also in PCalc Lite 1.6

1.5

• Added a new horizontal layout, "Engineering", that includes hyperbolic trig functions, hypotenuse, leg, gamma, delta percent, and more.
• Added a new calculator theme, "Widget", taken from PCalc for Mac OS X.
• Added a choice of six different key click sounds.
• Made the dot and comma much bigger in the "LCD" digit style. †
• Now highlight buttons to show when you are entering a decimal or an exponent. †
• Made the recent conversion swap buttons much easier to press. †

† Also in PCalc Lite 1.5

1.4

• Added an option to show the most recently used conversions and constants for faster access.
• Added many more unit conversions including a new cooking section.
• Added four new digit styles to choose from.
• Added a splash screen to stop untidy theme switching at startup. †
• PCalc longer rotates when upside-down, so you can now use it when you are lying on your side. †
• More performance improvements. †

† Also in PCalc LIte 1.4

1.3

• Added a new calculator theme "Twilight" taken from PCalc Lite.
• Added small theme previews to the settings.
• Added "Newtons" to the weight conversions.
• The two-line display option is now much more responsive and shows the contents of the memory when not in RPN mode.
• Various performance improvements.
• Fixed a display problem with the parentheses buttons.
• Fixed a display problem with the "High Power" theme.

1.2

• 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.

1.1

• 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.

1.0.2

• 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.

1.0.1

• 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.

1.0

• First release for iPhone.