TrackDyno turns your iPhone into a performance timer and dyno simulator — 0–60, quarter mile, lap times, and SAE J1349 horsepower estimates from GPS, IMU, barometer, and engine audio. No external hardware. No fuss.
Every measurement starts with your phone's sensors and ends with the kind of detail you'd expect from an expensive GPS puck — minus the puck.
0–60, 0–100, and a full set of rolling splits (30–50, 40–60, 60–80…). IMU-detected launch instant for sub-tenth-second repeatability on identical pulls.
Eighth mile, quarter mile, and half mile — elapsed time plus interpolated trap speed at each crossing. Distance integrated from GPS speed with proper fix-epoch timing.
Power and torque curves from GPS-derived acceleration, the vehicle's mass and aero, and the SAE J1349 atmospheric correction. Microphone-based RPM tracking through shifts.
Drop a two-point start/finish line on a map and TrackDyno detects every crossing — top speed per lap, best lap, and full session history.
One-tap export of your run as a 9:16 Instagram-ready card with all the numbers, a power curve, and the vehicle name on it.
Cross-check your phone's barometer against Apple WeatherKit, verify the IMU noise floor, and confirm GPS lock — all before you commit to a pull.
TrackDyno fuses every sensor your iPhone already has — and reads atmospheric conditions live from Apple WeatherKit — to produce estimates that hold up against a real dyno on anything from a Civic to a GT3.
GPS for speed and position, the IMU for forward/lateral G, the barometer for station pressure, and the microphone for engine harmonic frequency.
GPS-fix-epoch timestamps for sub-tenth-second crossings, orientation-agnostic IMU math, and barometer-vs-WeatherKit cross-check for atmospheric accuracy.
Force balance from mass, drag coefficient, frontal area, and rolling resistance — divided by drivetrain efficiency, scaled by the SAE J1349 atmospheric correction factor for repeatable, comparable HP numbers.
No accounts. No analytics. No ad tracking. Every run is stored on your device and, optionally, in your private iCloud — so you can pick up where you left off across iPhones, iPads, and Macs signed into the same Apple ID.
Read the privacy policy