Yeah I also wear a second watch for straight time and gps.
That the Spinsto shows straight time as well as game time inc your stoppages is really clever. But when i have tried the stoppages feature i have found the screen to then be a bit too much for my simple brain in the heat of battle. I should try it again
To be fair the Spinsto does excel at half time. You don't have to stop it at the end of the first half, and then it doesn't stop itself when the half time interval ends, and only needs one (admittedly looooong) press to start the second chukka