It started as a personal project a few months back. Since then, I have been using it myself, alongside building the functionality I need. Lately I have been working on polishing it up in order to put it out there for others.
Based on my usage so far, I've come to realize some good second order effects too -
1. having a list of exercises helps me quickly pick something meaningful to practice rather than noodling for most of the time.
2. At the end of a practice session, the total duration is just 15-20 mins yet it feels like quality practice. So now, even if I have just 20-30 mins of free time, I am motivated to squeeze in a quick practice session. Turns out, this is a game changer (at least for myself).
Feature wise, I'm quite happy with the current state of it although I have some ideas for premium features (if it generates enough interest). In the coming weeks, I am planning to switch gears a bit and focus more on marketing/promotion. I also need to play more, because ironically, my practice time has reduced in the last few weeks in the pursuit of "launching" it! Also, I've set a goal to publish one new exercise in the library every week until the end of this year.