Zero Lap: GPS Speedometer OBD2

Zero Lap is a GPS speedometer, speed tracker, lap timer, performance meter, OBD2 scanner and car service log for drivers, motorcyclists and car enthusiasts. Measure real speed, run acceleration tests, time laps, read your engine's live data and keep every vehicle's service history in one place.
GPS SPEEDOMETER FEATURES
- GPS speedometer in km/h and mph
- Large digital readout with analog speedometer dial
- HUD mode — mirrored speed display on car windshield
- Floating speed bubble over other apps, compass rose
- Trip odometer: distance, time, average and max speed
- Speed limit alert with vibration
- Voice coach: speed limit, hard braking and acceleration spoken aloud (Pro)
- Works offline, no internet needed
PERFORMANCE METER AND ACCELERATION TESTS
- 0-100 km/h and 0-60 mph acceleration
- 0-200 km/h top-end acceleration
- Quarter mile (402 m), eighth (201 m) and half mile (805 m)
- Roll-on: 60-100, 80-120, 100-200 km/h and 60-130 mph
- Braking 100-0 km/h with stopping distance
- Custom window — any two speeds you choose
- Full run (Pro) — one pull, every split afterwards
- Trap speed, peak speed and one-foot rollout
- Estimated horsepower from the acceleration curve (Pro)
OBD2 DIAGNOSTICS (PRO)
- Connect a Bluetooth ELM327 adapter and read the ECU
- Live engine data: RPM, coolant, boost, load and more
- Read and clear fault codes (DTC), explained in plain language
- Freeze frame, readiness monitors, VIN and EVAP test
FUEL AND SENSOR LOGGING (PRO)
- Live and average fuel consumption and drive cost
- l/100km, mpg or km/l; petrol, diesel, LPG and E85
- Record and plot any sensor over the drive
AI DIAGNOSTICS (PRO)
- Fault codes explained by AI in your own language: likely causes and how serious they are
- 1 free analysis every month, more via credit packs
SERVICE LOG (PRO)
- Service book per vehicle — work done, odometer, costs and notes
- Reminders by date or odometer, with notifications
- Cloud backup, restored on a new phone
TYRE PRESSURE (PRO)
- Live pressure and temperature from Bluetooth TPMS sensors, car or bike
CRASH DETECTION AND SOS (PRO)
- Detects a heavy impact and texts your emergency contacts a map link
- Break reminder after 1-8 hours at the wheel
LEAN ANGLE AND TILT (PRO)
- Lean angle for motorcycles, pitch and roll for quads
- Ride log with angle charts, PDF and share
WAYPOINTS (PRO)
- Save where you parked and walk back by map or compass
LAP TIMER (PRO)
- Circuit lap timer with automatic start/finish
- Up to three sector lines for splits
- Live gap to your best lap as you drive
- Voice coach reads sector and lap deltas aloud
- Draw the track on the map, then save and reuse it
G-FORCE AND TELEMETRY
- Real-time G-force meter (longitudinal and lateral)
- Peak acceleration, braking and cornering G per drive
- External Bluetooth GPS receiver (Pro)
DRIVE LOG AND HISTORY
- Every drive saved locally and named automatically
- Route map, speed and G-force charts
- Satellite view on the route map
- Eco-drive score 0-100 per drive, on wasted energy (Pro)
- Compare two runs side by side, race your ghost
- Unlimited history in Pro
- Cloud backup of everything, restored on a new phone (Pro)
COCKPIT AND VIDEO (PRO)
- Landscape cockpit with ten full-screen gauge faces
- Driving video with speed, G-force and timer overlay for Instagram, TikTok
- AI vehicle counter on your driving video
DATA EXPORT (PRO)
- CSV raw data, GPX and KML for Google Earth
- PDF performance report with charts
WHY CHOOSE ZERO LAP
- Privacy first — drives, routes and video stay on your device
- No account, no ads, one-time Pro purchase, no subscription
- Mobile alternative to Dragy, RaceBox and VBOX hardware
ACCURACY AND REQUIREMENTS
Zero Lap combines GPS with the phone's inertial sensors and rejects fixes too weak to trust. Not a legal speed reference. OBD2 needs a Bluetooth ELM327 adapter; AI diagnostics needs internet.
SAFETY NOTICE
Do not operate the phone while driving. Obey all traffic laws and speed limits.