Why I built this app

I’m an engineer, and I love writing code. I sit down and hours disappear. It caught up with me: rounded shoulders, an anterior pelvic tilt, an aching lower back. I got just about the full set.

One day my back hurt too much to ignore, so I decided to take stretching seriously and downloaded one of the popular stretching apps on the App Store. I rolled out a mat, worked through a whole routine, thought “this actually helps”, and just as I lined up another round, the paywall appeared.

So I thought: why not build my own app, with no cap on how many times I can train in a day, so I could really keep stretching and undo what sitting had done to my posture, and help anyone else in the same spot. That’s how Zestimer was born. Train as many times as you like, no limits: it’s here to make stretching easier to start, and easier to keep up.

Later I noticed something else. When people’s backs hurt, they go to YouTube and look for stretching videos from physical therapists and coaches. But once you find one you like, without a follow-along version you still have to remember the moves and count the time yourself. The videos pile up in your saves and rarely get opened again. So I added video follow-along: turn any YouTube or TikTok clip into a timed routine you can just follow, counting down and calling the rests, with every move and every interval adjustable to your own level.

Zestimer isn’t only a stretching app, of course. Use it for HIIT, Tabata and interval training too, or let AI put together a routine that suits you.