ペースクロック is a straightforward timer application designed for iPhone users, simulating the pace clocks commonly found in swimming pools. The app features a continuously moving minute and second hand, allowing users to track time easily. By default, it synchronizes with the current time, making it versatile for various uses beyond sports.

The app's functionality is minimalistic, offering only two main features: a "Current Time" button to align the hands with the present time, and a "Manual Adjust" button that reveals an input form for setting custom times. Users can enter minutes and seconds, and upon pressing the "Set" button, the hands adjust accordingly, with milliseconds starting from zero. Note that the app may crash if used without an internet connection due to advertising requirements.