SpeedGate

Measure 0–60, 0–100 km/h or any custom gate with GPS + IMU sensor fusion. Auto‑launch detection, calibration quality score, exportable run log. 100% on‑device.

SpeedGate turns your iPhone into a precision performance timer for cars, motorcycles and karts. Measure 0–60, 0–100 km/h or any custom speed gate with a level of accuracy usually reserved for dedicated VBOX‑style devices — using nothing but your phone.

A built‑in sensor fusion engine combines high‑rate GPS speed with the iPhone's IMU (accelerometer + gyroscope) through an improved Kalman filter, giving you a stable, low‑latency speed estimate even when the GPS signal momentarily drops. Every run is scored with a real‑time Quality Level and Estimated Timing Error, so you always know how trustworthy the result is.

KEY FEATURES • Single‑gate and two‑gate modes. Run a single gate or chain two gates in one launch. • Sensor fusion engine: GPS + accelerometer + gyroscope merged in real time. • Automatic launch detection: hold the vehicle stationary. SpeedGate stabilizes, arms, and starts timing the instant it detects a real launch — no buttons during the run. • 3D mount calibration: guided first launch captures the orientation of your iPhone inside the car. The calibration is stored as a 3D vector with a quality percentage, so the app knows exactly where "forward" is — regardless of how the phone is mounted. • Run quality & timing error estimate: every captured run is scored with a Quality Level and a millisecond‑level estimated timing error, so you can compare runs that are actually trustworthy. • Full session history: every run is saved locally with date, vehicle, target gates, distance, max speed, quality, and the full set of telemetry samples — searchable and filterable. • Vehicle profiles: save make, model, year and notes for each car or bike you test. Every run is tagged with the vehicle that produced it. • Live Speed Cockpit: a premium speedometer view with Logic, Fused and raw GPS speed side by side, plus IMU correction, fusion confidence and GPS accuracy. • Audio launch cues: optional countdown and gate cues at adjustable volume — perfect for solo testing. • Exportable session log: copy or share the full event log of any test session for post‑analysis or troubleshooting. • 100% on‑device, zero tracking: no accounts, no servers, no advertising, no analytics. Your data stays on your iPhone.

REQUIREMENTS • iPhone with GPS (any model running iOS 17 or later) • A stable mount in the vehicle (vent, suction or dashboard mount) for best accuracy • Open sky view for the GPS fix

DISCLAIMER SpeedGate is intended for use on closed tracks, private property, or under conditions where speed testing is legal. Always obey local traffic laws. Do not operate the app while driving — set it up before launching and let the automatic detection handle the timing.

Have feedback or feature requests? Email ipmdn@icloud.com — every message is read by the developer.