TrueLine: Bowling Ball Tracker

Pro-style ball tracking without the pro-shop price. Prop your phone behind the approach and get the numbers a coach would give you, on every single throw.

TrueLine turns your iPhone into a ball-motion tracker. Prop it behind the approach and bowl. Seconds after each throw, you see the numbers serious bowlers pay thousands to get, computed entirely on your phone.

WHAT IT MEASURES • Ball speed • Board at the arrows • Launch angle • Breakpoint board and distance • Entry board and entry angle • Total hook, in boards • Pocket hits

SEE YOUR GAME • Your throw replayed with the tracked path drawn on it • Every line of a session fanned on one lane view • Trends across sessions: speed, hook, entry angle, pocket % • Compare your arsenal: per-ball speed, hook, and pocket rate • Target-line practice: pick a board, get scored on hitting it • Share cards: one tap turns any shot into a post-ready image

MADE FOR PRACTICE • Calibrate once per phone placement, then just bowl • Works at any center on any lane, no extra hardware needed • Analyze footage you already have from your camera roll

PRIVACY Everything runs on your iPhone. There is no account and no subscription, and nothing is ever uploaded anywhere. Your first 10 throws are free. A single purchase unlocks TrueLine forever.