Lab Radar isn't getting cheaper and I haven't been feeling rich so I bought a Caldwell Chronograph for about $100 from Midway delivered. I lost my Shooting Chrony 5 years ago to fire. I had issues with the Chrony at first and was it heavily modded with side panels and was 98% reliable. The Caldwell worked right out of the box. 10 shots of 14.3g pellets at around 750 fps on an overcast day and it registered each one. Accuracy is supposed to be within 0.25%. I have no way check but I'm sure it's close enough for my needs. I'll try the App later and report but so far, it's a really good, cheap, chronograph.