Just got my 645M and hit the gym today. Tried the standard strength app which to me is a combination of the worst parts of other watches. It's not simple like the TomTom gym app. That one just lets you start and stop the app at the beginning and end of your gym session and it tracks your heart rate and time. Nothing to do between sets. Works great if your using a phone app like Jefit to guide you through the workout and track reps, weight, etc. Is there any app or widget that is simple like that or that allows you to synch with Jefit routines?
Thanks
James