- Banned
 - #1
 
airlocksniffer
WKR
Some guys were talking about this the other day at the range.  Basically you sight in your 20 yard pin, enter your FPS, draw length and peep-to-sight distance.  Hold the phone up to your sight and move your pins to match what was calculated by the app.  Haven't tried it yet but seems pretty cool.
http://velocitip.com/uno-app-download.html
 http://velocitip.com/uno-app-download.html