Straight answers on how to actually measure arm speed, throwing velocity, and swing speed — what's worth buying, what's free, and what each option gets right. More guides are on the way. Or jump straight to the head-to-head comparisons.

9 Ways to Track Your Arm Speed

Radar guns, wearable sleeves, launch monitors, and free phone apps — every way to track arm speed compared on accuracy, cost, and convenience.

Track Your Arm Speed for Free

No setup, no subscription. Just your iPhone or Apple Watch.