Originally posted by Blackhawk: My Widow must be going 300 fps if it's based upon sound. :D
Originally posted by el greco: I will post pictures and more details later because now I am taking a short brake from work. How the app works is this.It gives you a field that you put a distance from target. I set mine yesterday exactly at 12 yards. Then it gives you a field that you can put your arrow weight. That's optional and to calculate KE.Then you have to place your phone somewhere between you and the target. I put mine last night on the ground.Parenthesis here in order for the app to work you have to be in a relatively quiet environment . It doesn't have to be dead quiet but quiet .Then you press the button for the countdown .you have the option for 10,15,or 20secs.After the dude starts the countdown and gets to one I wait a second then release.What it does it measures the time of the sound of release and the sound of impact . It gives you a number of speed in feet per second that's nowhere near the speed of your now but then fine tuning comes in place and that's where it's all at.But more about that when I get home.It sounds complicated but after you do it a couple times it becomes a piece of cake.