How accurate is it?

Off a tee, in good light. Slow and medium swings are the sweet spot, in our own testing, that's where the estimate is tightest and most repeatable session to session.

Most backyard and cage sessions with a bright, clear view of the ball crossing the screen.

The very hardest adult swings (90+ mph), dim or indoor light, and soft toss, where the ball moves toward or away from the camera. We flag low-confidence sessions instead of hiding them.

How it measures your swing

Your phone films at 240 frames a second. You calibrate once so it learns the distance and your ball's size, then, on every frame, the ball acts as its own ruler. Because it knows exactly how big a baseball or softball is, it re-checks the scale on every single frame instead of trusting one setup. That is what keeps a pulled or inside-out ball from throwing the number off.

Why consistency is the headline

One hard swing is luck; ten hard swings is a skill. So instead of obsessing over a single number, we track how tightly your exit velo clusters across a session. A steady 70 mph beats a one-off 80 with a bunch of mishits. It is the truest sign you are actually getting better, and the hardest thing for a cheap radar gun to show you.

When it would rather say nothing

The app only shows a number when the camera actually tracked the ball through enough of its flight. A read that came from a short or messy track is marked rough, and a swing it could not see cleanly gets no number at all, just a tip on the fix. A shaky read can never sneak in and crown a personal record. We would rather hand you fewer numbers than one confident wrong one. We learned exactly where this line should sit by filming a real family of six and watching which swings measured clean and which did not.