Frame-by-frame tracking
Lock the impact frame, advance a few frames, tap the ball. The app does the math using real-world references and your device's high-speed capture.
Live on iOS & Android
Tennis Radar.
Ball speed from any video.
Point your phone, film the swing, and let Tennis Radar compute the velocity frame by frame — no sensor, no paired device, just your camera.
SPEED
182 km/h
SLOW-MO
240 FPS
Features
Designed for precision.
Built around a clean, frame-accurate workflow so every measurement feels deliberate — from the first tap to the final readout.
Record or import
Shoot with the built-in high-framerate camera, or import any slow-mo video from your gallery.
Calibrated references
Use a racket, a club, a bat, the net, or a player's height — the app turns a known length into accurate speed.
Slow-motion aware
Import any slow-mo factor — the time reference is adjusted so readings stay true to real-world speed.
Fifteen sports, one app
Tennis, padel, golf, baseball, soccer, volleyball, hockey, pickleball, and more — each with guided calibration.
Native on iOS & Android
Two codebases, one experience. Built from the ground up on each platform for tight, native performance.
iPad Pro
A bigger canvas for
a sharper tap.
The iPad layout uses every pixel of the Liquid Retina display. Scrub the timeline with one finger, drop calibration points with the other — and see the swing unfold at full resolution.
- Dual-hand trim and calibration
- Optimized for Stage Manager
- Pencil-friendly dot placement
How it works
Four steps. One number.
01
Trim the clip
Drag the handles to isolate the moment of impact.
02
Lock the impact frame
Scrub to the frame where racket meets ball.
03
Calibrate & track
Mark a reference and the ball across a few frames.
04
Read the speed
See it in km/h or mph — ready to share.
Sports
Built for the whole racket room.
Each sport ships with guided calibration — references, object heights, and default units tailored to how the sport is actually played.
Tennis Padel Pickleball Badminton Squash Table Tennis Golf Baseball Cricket Soccer Football Basketball Handball Volleyball Ice Hockey + Custom
FAQ
Tennis ball speed questions.
Common questions about turning your iPhone or Android into a tennis radar.
How does Tennis Radar measure tennis ball speed without a sensor?
Tennis Radar analyses a slow-motion video frame by frame. You mark a real-world reference (a racket, the net, a player's height) and tap the ball across two or three frames. The app converts pixels-per-frame into real-world speed using your device's recorded frame rate — no external sensor or paired device needed.
Is Tennis Radar free on iPhone and Android?
Yes. Tennis Radar is free to download on the App Store for iPhone and iPad and on Google Play for Android. It works with slow-motion videos you already have in your gallery.
Which iPhone or Android phone do I need for accurate readings?
Any iPhone, iPad or Android phone capable of recording slow-motion video. For tennis serves over 150 km/h (about 100 mph) we recommend 240 fps — supported on iPhone 8 and newer, and on most recent Android flagships.
Can I import an existing slow-motion video into Tennis Radar?
Yes. Record inside Tennis Radar or import any slow-mo clip from your phone gallery. The app reads the embedded slow-motion factor so the reading stays true to real-world units.
Which sports are supported by Tennis Radar?
Tennis, padel, pickleball, badminton, squash, table tennis, golf, baseball, cricket, soccer, American football, basketball, handball, volleyball, ice hockey, plus a custom mode for any other ball or projectile.
How accurate is a video-based tennis radar compared with a real radar gun?
With a stable phone, a clear reference object, and at least 120 fps, Tennis Radar is typically within a few percent of a hardware radar gun — accurate enough for serve coaching, training feedback and casual benchmarking.