This update from Apple will improve the functionality of this app. No new features are included. ATC Calc 2.0 has the following changes: - It fixes issues that stopped previous versions of ATC Calc from working with iOS 9. - The buttons and displayed time values are presented somewhat differently in an attempt to make them easier to read in all lighting situations. - It replaces the black-text-on-white-background/white-text-on-black-background toggle with a slider that adjusts the "brightness" of the background, buttons and display. It does this by adjusting how gray they are displayed. - It scales the buttons and displays to match the size of the screen that it is being run on. There is one small problem noted on some devices. On these devices, the brightness slider will sporadically not respond when touched. This is only an issues on a small number of devices and is a small problem compared to this app not working at all on iOS 9.

Background can be toggled between white and black. Fixed odd behavior with Clear Entry after '=' has been pressed. Minor, miscellaneous improvements.

1. ATCCalc now requires that the clear button be pressed twice to actually clear the calculated arrival time value (the top line) after "=" had been pressed. This is to avoid accidentally deleting the calculated arrival time. 2. The size of the "+" and "=" buttons have been changed so that they are the same size. 3. Minor bug fixes.