While commercial models cost a pile of money, the team was able to source a dual clock / stopwatch with a nice big display, and hack it up with an Attiny13. The stopwatch is deactivated when the ...

The app is titled "Alarm & Clocks" and is offered as a standalone app. It offers some basic functionalities in the way of Timers, Alarms, World Clock, and Stopwatch. Nothing too ground-breaking.