Record your first session with just your phone

You don't need any hardware to start. Your phone's GPS is enough for lap times, a track map, and coaching.

Steps

1. Mount your phone securely in the kart or car, with a clear view of the sky. A pocket works poorly; a dash or chassis mount works well.
2. Open the Record tab and choose Phone GPS as the source.
3. Wait for a GPS fix, then start recording. You can lock your phone or switch apps mid-session — LapperSnapper keeps recording GPS in the background on both iPhone and Android. Keeping the screen on works too; it's just not required.
4. Drive your session.
5. Stop recording when you're done. The session saves to Sessions automatically.

Open the session to see your laps, the track map, sector times, and your first coaching insight.

Tips

• The app identifies the circuit automatically from your position — no setup needed at known tracks.
• Phone GPS updates about once per second. That's plenty for lap times and your line; for sharper data, a RaceBox records at a much higher rate. See Record with a RaceBox.
• Turn off battery-saver mode before a session; it can throttle GPS.

Next steps

• Use Drive mode (the full-screen HUD)
• Read the session Overview