This is it!
I tried a bunch of apps to get a regular reminder to take a break from the computer. This one had the perfect mix of presistent-but-not-interruptive reminders to get me to actully do it without irritating me so much that I disable it. The stretching and strain management exercises are practicaL (like, you can do many of them without looking like a wierdo in pubic) and not repetitive. This latest update makes it fit in much better with Yosemite, too.
djeckhart about
Healthier: Break Reminder