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
- Trip odometer: distance, time, average and max speed
- Speed limit alert with vibration
- 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
- 0-100-0 in one run
- Custom window — any two speeds you choose
- Full run (Pro) — one pull, every split afterwards
- Trap speed, peak speed and one-foot rollout
- Automatic start — timing begins as you move
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
- Full diagnostic report as PDF or CSV
FUEL AND SENSOR LOGGING (PRO)
- Live and average fuel consumption, and what the drive cost
- From the ECU fuel rate or the air-flow sensor; l/100km, mpg or km/l
- Petrol, diesel, LPG and E85
- Record the live stream and plot any sensor over the drive
- Min, average and max per sensor, and CSV export
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
- Backed up to the cloud, restored on a new phone
- Share or export the history as PDF or image
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
- Best lap and theoretical best from your fastest sectors
- Draw the track on the map, then save and reuse it
G-FORCE AND TELEMETRY
- Real-time G-force meter (longitudinal and lateral)
- Axes align to the car automatically, no calibration
- Peak acceleration, braking and cornering G per drive
- Road grade compensation, GPS up to 4 updates per second
- External Bluetooth GPS receiver support (Pro)
DRIVE LOG AND HISTORY
- Every drive saved locally and named automatically
- Route map, speed and G-force charts for each trip
- Filter by date, select drives to export or delete
- Compare two runs side by side, race your ghost
- Unlimited history in Pro
COCKPIT AND VIDEO (PRO)
- Landscape cockpit with six full-screen gauge faces
- Driving video with speed, G-force and timer overlay for Instagram, TikTok
POWER ESTIMATION (PRO)
- Estimated horsepower from the measured acceleration curve
DATA EXPORT (PRO)
- CSV raw data, GPX and KML for Google Earth
- PDF performance report with charts
WHO USES ZERO LAP
Car enthusiasts, tuners, drag strip and track day amateurs. Motorcyclists without a digital speedometer. Drivers who don't trust the factory one.
WHY CHOOSE ZERO LAP
- Privacy first — your data stays 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. Open sky gives best results. 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.
Turn your Android into a GPS speedometer, lap timer, drag meter, OBD2 scanner and service log. Get Zero Lap today.