iPhone Screenshots


ATC Calc Plus is for use in stage rally competition to calculate the arrival time for the next control. This enhanced version includes a countdown timer and the ability to adjust time (within ATC Calc Plus) to match rally time.

ATC Calc Plus displays the time in large digits that are easy to read, even in bright sunlight when the rest of the display is hard to read. The buttons for entering the time and adding transit times, bogey times, etc. are large to make it easier to enter them on rough transits. Once the arrival time has been calculated, it takes two presses of the Clear button in order to reduce the chance of accidentally deleting the calculated arrival time because of a finger slip on a rough transit.

All of these features have been tested on stage in real rally conditions.

What's New

Version 2.0

ATC Calc Plus 2.0 has the following changes:
- It fixes issues that stopped previous versions of ATC Calc Plus 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 has more options for synchronizing time within the app to rally time.
- 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.

Customer Reviews

Great product until!


Worked great and used it everyday until IOS9! How did the creators not see this coming! Please fix it ASAP!

Does not work in iOS 9


Needs to be updated


Alan Perry
871.4 KB
Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2016 Snowmoose Software/Alan Perry


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