Tennis Blackbox

Tennis Blackbox turns your iPhone into a powerful tennis match recorder and analyzer. Use a dual-device setup to capture every rally in 240fps slow motion, then review your play on an iPad or second iPhone.

RECORD
- Capture matches at 240fps for detailed slow-motion playback.
- Seamless recording with no gaps between video segments.
- Automatic frame verification ensures full quality capture.

ANALYZE
- Automatic court direction detection using on-device machine learning.
- Ball tracking with trajectory visualization powered by OpenCV.
- Browse footage with broad and detailed thumbnail timelines.

MULTI-CAMERA CONTROL
- Connect multiple iPhones as cameras over your local network.
- Live H.264 video preview from each camera at 30fps.
- Monitor up to 8 courts with smart resource management.

DUAL-DEVICE SYSTEM
- iPhone records your match hands-free as the camera.
- iPad or second iPhone monitors and analyzes as the controller.
- Devices connect automatically over local Wi-Fi.