Does what it does so well. Great, simple timer, reliable, nice warning before abandoning countdown, great sync option near the minutes. I use this to run high school races at regattas when our start box isn’t working, and during practice all the time. Used to have a Ronstan sailing watch for this but those stop working after about 3 years for some dumb (and expensive) reason.
Only problem with this app is using it will probably lead to me dropping my phone in the river sometime. Which won’t be the app’s fault, but still.