@RAyers I use Equilab mostly as a check after I’m done. Did I make roughly the same number of turns to the right as the left (unless I had a reason to emphasize one). Did I trot and canter for a reasonable amount of time? I’ll sometimes write down the trot and canter times and compare from week to week.
What I’ve learned is that I’m pretty good about keeping things even. I only use it about once a week, one of the times I don’t ride in a lesson.
I also used it during rehab (no, not that kind) to look at the total times, though I was timing with a watch for each set.
During the flat parts of lessons, the trainers set the timers on their phones for five minutes to make sure we do two five-minute trot periods.
I’m pretty sure Equilab fights with the timer on the iPhone as, when I’ve had both running, the timer didn’t work properly. But my analog wristwatch did.