Turn your Android into a track-ready telemetry and video recorder
Records lap timing, acceleration runs and synchronized video with telemetry overlays, turning a phone into a mobile performance recorder within a single workflow. SplitShift Race Timer, from G19 group, targets automotive enthusiasts and amateur racers who need circuit lap times, sector splits, and exportable MP4s. Key capabilities include GPS-based 0–100 km/h and quarter-mile timing, optional external high-frequency Bluetooth GPS and OBD-II data capture, and a privacy-first design that keeps session files on the device.
What the app does for track-day data collection
SplitShift records time-based performance and pairs it with video. It captures drag test metrics (0–100 km/h, quarter-mile), circuit lap times and automated sector splits using the device GPS, then synchronizes those data streams with on-device video to export MP4 files that include speed, G-force and route overlays.
How precise the timing and telemetry can be
Accuracy increases when external hardware is used. The app supports high-frequency Bluetooth NMEA GPS receivers for tighter timing resolution and ELM327 OBD-II adapters to log RPM and throttle, which improves correlation between vehicle signals and GPS-derived speed, compared with relying on internal smartphone sensors alone.
Which devices and connections the tool supports
The workflow runs on Android and uses standard wireless links to add precision. The app operates with internal GPS and sensors out of the box, and supports external Bluetooth GPS modules and OBD-II adapters for higher-fidelity data. That model keeps the core functions working without device modification and uses common accessory interfaces for expanded telemetry.
Who benefits and what limits real-world use
Designed for track-day drivers and hobbyist testers who need session documentation. The Garage feature organizes logs by vehicle and modifications, and the on-device export avoids post-processing. Users should accept that true professional timing accuracy depends on external high-frequency GPS or track timing systems, and that using telemetry at closed-course events must follow venue rules.
Practical mobile telemetry for enthusiasts who value local control
SplitShift is a capable option for drivers who want data-rich session recordings stored locally and exportable as telemetry-overlaid video. The app suits anyone willing to pair an external GPS or OBD-II adapter for higher precision. Users are responsible for ensuring their use complies with event and platform rules, and should expect the best timing only when they add external high-frequency hardware.
