Great and will get better.

5 star user friendly and I like the color scheme.
Suggestion:
-Would love to see the split time between all shots in one screen without having to scroll.
-Increase the random start time. Make it like from 3 to 15 seconds.
Your max 4seconds is not enough to build anticipation drill errors, and your start time on zero seconds just ruins the drill because it starts really fast.
- A couple of more improvements and you can easily have a free version and maybe a couple of dollars charge for the full version.

If you start building a graph option to see progress over time and a few articles about drills that respected shooters have put together, or even small paragraphs about drill options , then you will really have something special.

Thank you.

SycOps about Gun Shot Timer, v2.3