I will keep updating this as I use it. So far I love the idea and the shot timer I received seems sturdy so far. With the app I get a lot of freezing. You should make the shot timer and par timer totally separate. Finding out how to turn off the par timer took a while. I would like on the home screen to see at the top "shot timer", "par timer" and Settings icon. this way I can select par timer and on that screen see results and adjust the par timer settings while being able to click on shot timer and have a screen with my times start button etc with settings to adjust there. Also there is no way to delete photos if you took one by mistake. I can't save any of my data and when I click on share link it I get an error. I have many ideas to make this app awesome so please feel free to contact me.
So far I've used this with the little $30 3D printed part on two outings to the range and so far have been pretty disappointed with it. I haven't been able to get it to detect my shots correctly (I shoot steel targets outdoors in a private bay). Actually my free shot timer app on my phone is better and easier to use, I'm sorry to say. I will keep fiddling with it but it's slow to respond once I start the timer and overall has been difficult to use. I really hope it gets updates to improve the app because I love the idea.
Bug fixes and minor improvements
Set WaitTime, ExerciseTime, BreakTime, and run! It is simple interval timer!