Arm Speed Analyzer vs. Camera Radar Apps
Camera-Calibrated Radar AppApps like Athla Velocity and SmartPitch use your phone's camera and a known throwing distance to estimate real ball velocity — a genuinely different approach from Arm Speed Analyzer's motion-sensor tracking. Both live on your phone; here's how they actually compare.
The Race
mph Accuracy
Camera-calibrated apps like Athla Velocity and SmartPitch use known throwing distance and video to estimate ball velocity, with some reporting accuracy close to a professional radar gun under ideal conditions. Arm Speed Analyzer measures device motion instead, which isn't the same kind of number.
Cost
Both are inexpensive compared to any radar hardware — a phone you already own is the only real requirement either way.
Setup
Camera radar apps need the phone mounted at a known, consistent distance and angle to calculate velocity correctly. Arm Speed Analyzer reads motion directly from the device you're wearing or holding, wherever you happen to be standing.
Sports Covered
These camera radar apps are built specifically around a thrown pitch traveling a known distance. Arm Speed Analyzer works the same way for a golf swing, a tennis serve, or a disc golf throw.
No Fixed Distance Needed
Camera-based velocity math depends on knowing exactly how far the ball traveled. Arm Speed Analyzer doesn't need that — it reads the motion of the throw or swing itself.
Which Should You Use?
Choose Camera Radar Apps If…
you want the closest free-tier estimate to a real radar mph reading, and you don't mind setting up a tripod at a fixed, known distance every session.
Choose Arm Speed Analyzer If…
you want zero setup — no tripod, no measuring distance — and you want the same app to work for golf, tennis, pickleball, and disc golf, not just pitching.
Frequently Asked Questions
Are camera radar apps more accurate than Arm Speed Analyzer?
For a raw mph number, likely yes when set up correctly — they're calculating actual ball velocity from video and known distance. Arm Speed Analyzer measures device motion instead, which is better suited to tracking trends than producing a certified reading.
Why would I use a motion-sensor app instead of a camera radar app?
Convenience and versatility. Camera radar apps require a tripod and a fixed, known distance every time. Arm Speed Analyzer just reads your watch or phone's motion, so it works the same way for a golf swing or a pickleball serve as it does for a pitch.
Track Your Arm Speed for Free
No setup, no subscription. Just your iPhone or Apple Watch.
