Zero Lap: GPS Speedometer

GPS speedometer with 0-100, quarter mile, G-force and HUD for car enthusiasts

Zero Lap is a GPS speedometer, speed tracker, lap timer and performance meter for drivers, motorcyclists and car enthusiasts. Measure real speed with GPS accuracy, run acceleration tests, time laps on a circuit, record drives and analyze vehicle performance — no extra hardware required. Your phone becomes a professional GPS speedometer with HUD display, analog dial and trip odometer.

GPS SPEEDOMETER FEATURES

- Real-time 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
- GPS signal quality and satellite count
- Speed limit alert with vibration
- Works offline, no internet needed
- Battery-efficient GPS tracking

PERFORMANCE METER AND ACCELERATION TESTS

- 0-100 km/h and 0-60 mph acceleration tests
- 0-200 km/h top-end acceleration
- Quarter mile (402 m), eighth mile (201 m), half mile (805 m) drag
- Roll-on: 60-100, 80-120, 100-200 km/h and 60-130 mph
- Braking 100-0 km/h with distance in metres
- 0-100-0 — acceleration and braking in one run
- Custom window — time between any two speeds you choose
- Full run (Pro) — one pull, every split worked out afterwards
- Trap speed, peak speed and drag-strip one-foot rollout
- Automatic start detection — timing begins as you move

LAP TIMER (PRO)

- Circuit lap timer with automatic start/finish detection
- Up to three sector lines for splits
- Live gap to your best lap while 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)
- Accelerometer and gyroscope sensor fusion
- Axes align to the car automatically — no calibration, mount the phone any way
- Peak acceleration, braking and cornering G saved with every drive
- Road grade compensation, GPS at up to 4 updates per second

DRIVE LOG AND HISTORY

- Every drive saved locally, named automatically — a number plus where you set off from
- Route map, speed chart and G-force chart for each trip
- Select mode — tick several drives, then export or delete at once
- Filter the log by today, last 7 days or any date
- Compare two performance runs side by side
- Ghost mode — race against your previous run
- Unlimited history in Pro

POWER ESTIMATION (PRO)

- Estimated engine horsepower, converted from measured wheel power
- Uses acceleration curve, vehicle weight and road grade
- Honest ±10% accuracy disclaimer

VIDEO OVERLAY (PRO)

- Record driving video with live telemetry overlay
- Speed, G-force, timer and route on MP4, ready for Instagram, TikTok and YouTube

DATA EXPORT (PRO)

- CSV raw data for analysis
- GPX and KML for Google Earth and mapping tools
- PDF performance report with charts, or share a single drive as PDF

WHO USES ZERO LAP

Car enthusiasts, tuners and modified vehicle owners. Drag strip and track day amateurs. Motorcyclists without a digital speedometer. Drivers who don't trust the factory speedometer (most read 5-10% high). Cyclists, e-scooter and e-bike riders.

WHY CHOOSE ZERO LAP GPS SPEEDOMETER

- Privacy first — all calculations run on your device
- No account, no data collection, no tracking
- One-time Pro purchase, no subscription, no ads
- Mobile alternative to GPS performance meter hardware like Dragy, RaceBox and VBOX

ACCURACY AND REQUIREMENTS

Zero Lap combines GPS with the phone's inertial sensors and rejects fixes too weak to trust. Accuracy depends on device and satellite coverage — open sky gives best results. Not a legal speed reference. Needs an Android device with GPS and location permission; camera permission for video overlay (Pro).

SAFETY NOTICE

Designed for drag strip, track day and passive speed reference. Do not operate the phone while driving. Obey all traffic laws and speed limits.

Turn your Android into a complete GPS speedometer, speed tracker, lap timer and drag performance meter. Get Zero Lap today.