ForceData vs Hitter AI

ForceData is a very simple app that uses the sensors of the iPhone, iPad or Apple Watch to measure acceleration, velocity and force. Also, it exports filtered data to a CSV file. This CSV file is already prepared to plot force-time, velocity-time and acceleration-time curves easily. Very useful for simple sport biomechanics analyses in exercises like the countermovement jump or the squat!

Your kid's swing, broken down like a hitting coach would do it, without ever sending a video of your child anywhere. Hitter AI films one side-view swing and analyzes it right on your phone using on-device body-pose tracking. Nothing uploads. No servers, no cloud storage, no strangers watching your kid swing a bat. That video stays on your device, period. Most hitting lessons cost fifty to eighty dollars a session and give you a few cues you might remember by the next practice. Hitter AI grades six core hitting mechanics — balance and head, load and stride, hip-shoulder separation, bat path, connection, and extension and finish — every time, and shows you exactly why the swing scored the way it did. You get an overall swing score with a letter grade from A+ to D, plus real readouts like attack angle, head drift, stride ratio, hand path, and time to contact. No exit velocity gimmicks or radar-gun promises here — just the mechanics that actually build a repeatable swing. When something's off, Hitter AI identifies the top flaw from a library of ten common youth swing faults and explains it in plain English, not jargon. Then it hands you drills, not just criticism. The 24-drill library comes with animated setup-move-finish diagrams, filtered to the exact issue your hitter needs to fix. Every graded swing includes frame-by-frame playback with a skeleton overlay and a flaw spotlight, free for everyone. A weekly training plan builds itself automatically based on your hitter's most recent swing, so you always know what to work on next. Not sure if the bat is even the right fit? The built-in bat calculator recommends length and drop weight by age, height, and league — Tee Ball, USA Baseball, USSSA, or BBCOR. Track progress over time with score trends, best score, and average across every swing you've graded, so improvement isn't a guess. Free accounts get 3 swing analyses a month. Pro Player unlocks unlimited analyses for $7.99/month or $59.99/year. Open the app, film one swing from the side, and see what's actually happening in your hitter's mechanics. https://hitterai.rork.app/terms https://hitterai.rork.app/privacy