pmStopWatch
pmStopWatch is a simple stopwatch app that lets you control up to 3 watches at the same time
Usage
Tap each stopwatch to check/uncheck it.
Pressing the OK (Record) button will start/stop all checked stopwatches
Pressing the Menu button will reset all checked stopwatches (and stop them)
Watch Support
I think I only selected to build for Vivoactive, but should be able to activate for other square watches too
Downloads
https://apps.garmin.com/en-US/apps/03e542be-2444-4d28-82e0-995eb22fc0fd
Source Code
https://github.com/pmprog/pmStopWatch (MIT Licence)
History
v1.0
Initial Release