iPhone Screenshots


ATC Calculator (ATCCalc) is a utility for use in stage rally competition for calculating the arrival time for the next control. Time can be entered in minutes or hour:minute format. Hour:minute time is based on a 24-hour clock.

The time values are displayed in a large format for easier viewing. The buttons are larger and separated to make it easier to select the intended button on rough transits.

What’s New

Version 2.0

This app has been updated by Apple to display the Apple Watch app icon.

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.

Ratings and Reviews

3.0 out of 5
1 Rating

1 Rating

SleeperMD ,

Works fine, but...

Add a subtraction function and the versatility of this app would increase significantly.

App Privacy

The developer, Snowmoose Software, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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