It's nice to get a glimpse behind the scenes of JEfit.
I used this app when I got serious about my fitness journey around 8 years ago. I fell off from using it 4 or 5 years ago (no fault of the app.) I can honestly say, it made it really easy to stay consistent with my workouts and show up to the gym confident in my programming.
Perhaps what I love best about this story, and similar startup stories, is the purity of building something to solve a problem personally. Then when the success of that thing happens as a side effect, it seems more appropriate. Stories like this take me back to the simple joy of creating something useful.