What's New

- Changes necessitated by iOS 13 & 14
- Bug fixes

App Description

The TSD Rally Split consists of two clocks with different purposes. Master•Time on the left is the rally time-of-day clock. This clock can be adjusted to synchronize with the Official Rally Time clock. Also, the Master•Time clock can be split/stopped by touching the button on the left side. Retouching the button will cause the split time display to disappear.


Monte•Carlo on the right is a stopwatch with two buttons: one starts and resumes the stopwatch and the other records each lap.

When the stopwatch has been stopped, there are three options for resetting it to zero for another start available when you click the Stopwatch Reset Options button below the stopwatch. One option (To Zero Now) is to reset to zero and await pressing the Start button. A second option (Next Minute) is to have the stopwatch reset when the time-of-day clock reaches the next full minute. A third option (Preset Time) allows you to select any time in either minutes:seconds or minutes:cents using the four sets of green or red buttons to increment to the time desired.

In order for any of these three options to take affect, you must touch the Apply button on the Stopwatch Reset Options popup.

Touching the "Adjust" button opens a popup that allows you to synchronize the Master•Time to the Official Rally Time by making adjustments in increments of +/– 0.1 seconds to account for total errors of as much as + or – 10 seconds.

Touch the Lock button to make clock adjustments. Adjust time ahead or behind as needed and, when finished, touch the Unlock button to prevent unintended adjustments. Touch the double Arrows singly or continuously to make adjustments in +/– 0.1 second increments.

When unlocked, a chime will sound at 0 seconds and 30 seconds. This audible cue is helpful when synching with an Official Clock.

When the Official Rally Clock’s second hand reaches zero, the start of a new minute, estimate the error by which your clock is behind or ahead of the Official time and add or subtract 0.1 second increments.

On the clockface displays, time can be measured in either seconds or decimal minutes. Additionally, there are two levels of time precision. One displays two digits for seconds or two digits for hundredths of a minute. For more precision, the other measures and displays seconds as two digits plus tenths of a second or three digits for thousandths of a minute.

There are three watch face styles: black, yellow, and white.

iPhone Screenshots

(click to enlarge)

TSD Rally Split screenshot 1 TSD Rally Split screenshot 2 TSD Rally Split screenshot 3 TSD Rally Split screenshot 4

iPad Screenshots

(click to enlarge)

TSD Rally Split screenshot 5 TSD Rally Split screenshot 6 TSD Rally Split screenshot 7 TSD Rally Split screenshot 8

App Changes

  • April 25, 2015 Initial release
  • May 01, 2015 Price increase: $5.99 -> $11.99
  • May 06, 2015 New version 2.0
  • May 11, 2015 Price decrease: $11.99 -> $7.99
  • May 16, 2015 New version 2.1
  • May 19, 2015 Price decrease: $7.99 -> $3.99
  • October 05, 2015 New version 2.2
  • March 09, 2016 New version 2.3
  • March 24, 2016 New version 2.4
  • July 03, 2016 New version 3.0
  • December 06, 2016 New version 3.1
  • December 14, 2016 New version 3.2
  • June 14, 2019 New version 3.5.2
  • June 14, 2019 Price increase: $3.99 -> $5.99
  • June 14, 2019 Price increase: $3.99 -> $5.99
  • June 15, 2019 Price increase: $3.99 -> $5.99
  • June 15, 2019 Price increase: $3.99 -> $5.99
  • June 15, 2019 Price increase: $3.99 -> $5.99
  • June 16, 2019 Price increase: $3.99 -> $5.99
  • July 15, 2020 New version 3.5.3
  • November 12, 2020 New version 3.5.4