ATC Calculator

CentWatch is an iPhone app for use in Time-Speed-Distance (TSD) rally competition. Its can be used to display time (either current "wall" time or elapsed stopwatch time) in cents (hundredths of a minute). This simplifies time calculations used to compete.

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 roads. The text and background color can be changed between black text on a white background and white text on a black ground to compensate for the viewing environment (bright sunshine vs night time).

Support information is also available.

And, of course, a list of Frequently Asked Questions is also available.