You know your exit velocity. This turns it into a real distance, for the field you're standing on today.
Elevation, temperature, humidity and wind all change how far the ball carries. Your phone already knows them, so the app never makes you type them in. It just tells you what it found and gets on with it.
Every result breaks down how many feet came from the altitude, the heat, the humidity and the wind — and what the same swing would have gone on a neutral day.
Your trend line uses the neutral-day distance, so a hot afternoon at altitude never looks like improvement. If the line goes up, you got better.
Drag exit velocity, launch angle, elevation or wind and watch the distance move. Compare a 33/-10 against a 34/-9 and get the breakeven bat speed — the slowest you can swing the heavier bat before it starts costing you distance.
One purchase, everything unlocked, forever. No in-app purchases, no ads, and no data collection of any kind.