Acceleration, braking, lap times, G-forces and slope — measured with your phone's sensors and GPS, or with external GNSS and OBD hardware when you want more precision.
0–100 km/h, 0–400 m, 100–0 braking distance, with slope and GPS accuracy shown alongside so a result can be judged on its merits.
Track sessions with sector times, racing-line and G-force heatmaps, and lap-by-lap comparison.
Record video while you drive and burn speed, G-force and slope onto the footage. Video never leaves your device.
Read fault codes and live engine data through an OBD adapter, with an optional AI-assisted explanation.
Connect a high-rate GNSS receiver for centimetre-class positioning and 25 Hz sampling when phone GPS is not enough.
Turn a run into a card showing the result, the speed curve and the conditions it was measured under.
Optional Google sign-in so your vehicles, laps and settings follow you to a new device. Served from outside mainland China.
Phone-number sign-in instead of Google, served from a server inside mainland China.
Set up your measurement before you move, mount your phone securely, and keep your attention on the road. Acceleration, braking and lap-timing features are meant for a racetrack, private property or another legal venue — not public roads. Measurements are estimates, not certified results.
Most measurement data stays on your device. You can use the app without an account — signing in exists only so your data can follow you to a new device. No advertising SDKs, no analytics trackers, and your data is never sold.