The App works fine except I had to set the phone to not go to sleep. Odd thing is that you can't send any commands to the unit unless it is disarmed. Easy to wait for that to happen.
Made it far easier to start a new string.
Had something new happen. With some of the higher velocity, like 2500 fps, loads the unit looked like it turned off then came back after a few seconds. Likely didn't like the muzzle blast. Might need to make a barrier to prevent issues from that in the future.
Once you get the setup right this is easily the best chronograph I have used. Would be interesting to see something like Waco and his 338 to see how far downrange it can track the bullet. My 357 loads seem to be tracked for 40-60 yards.