Zero Lap: GPS Speedometer

Zoran Gojkovic

In-app purchases

About this app

Zero Lap is a GPS speedometer, speed tracker and performance meter for drivers, motorcyclists and car enthusiasts. Measure real speed with GPS accuracy, run acceleration tests, record drives and analyze vehicle performance — no extra hardware required.

Your phone becomes a professional GPS speedometer with HUD display, digital and analog speed readout, trip odometer and complete performance meter for 0-100 km/h, 0-60 mph, quarter mile and more.

GPS SPEEDOMETER FEATURES

- Real-time GPS speedometer in km/h and mph
- Large digital speed readout with analog speedometer dial
- HUD mode — mirrored speed display on car windshield
- Trip odometer with distance, time, average and max speed
- GPS signal quality indicator and satellite count
- Speed limit alert with vibration
- Works offline — GPS speedometer runs without internet
- Battery-efficient GPS tracking

PERFORMANCE METER AND ACCELERATION TESTS

- 0-100 km/h acceleration test
- 0-60 mph acceleration test
- 0-200 km/h and 0-300 km/h
- Quarter mile (0-400 m) and eighth mile (0-200 m) drag
- Roll-on times: 60-100, 80-120, 100-200
- Braking test (100-0 km/h)
- Reaction time measurement
- Automatic start detection — GPS performance meter begins timing when you move
- Drag strip style run reports

G-FORCE AND TELEMETRY

- Real-time G-force meter (longitudinal and lateral)
- Accelerometer and gyroscope sensor fusion
- Road grade compensation for power estimation
- GPS speed tracker with 10 Hz update rate

DRIVE LOG AND HISTORY

- Every drive saved locally on device
- Route map for each trip
- Speed tracker chart over time
- Side-by-side comparison of two performance runs
- Unlimited history in Pro
- Ghost mode — race against your previous run

POWER ESTIMATION (PRO)

- Estimated horsepower at the wheels
- Uses acceleration curve and vehicle weight
- Road grade correction via accelerometer
- Honest ±10% accuracy disclaimer

VIDEO OVERLAY (PRO)

- Record driving video with live telemetry overlay
- Speed, G-force, timer and route composited onto MP4
- Export ready for Instagram, TikTok and YouTube
- High quality overlay design

DATA EXPORT (PRO)

- CSV raw data for analysis
- GPX and KML for Google Earth and mapping tools
- PDF performance report with charts and speed graphs

WHO USES ZERO LAP

- Car enthusiasts, tuners and modified vehicle owners
- Drag strip and track day amateurs
- Sports car owners comparing stock vs modified performance
- Motorcyclists without a digital speedometer
- Drivers who don't trust factory speedometer (most read 5-10% high)
- Cyclists, e-scooter and e-bike riders
- Anyone curious about real acceleration numbers

WHY CHOOSE ZERO LAP GPS SPEEDOMETER

- Privacy first — all GPS speedometer calculations run on your device
- No account required, no data collection, no tracking
- Honest numbers — clear GPS accuracy and ±10% power estimation disclaimer
- One-time Pro purchase — no monthly subscription
- Clean automotive design, no ads
- Mobile alternative to dedicated GPS performance meter hardware like Dragy, RaceBox and VBOX

GPS SPEEDOMETER ACCURACY

Zero Lap uses GPS and inertial sensor fusion (Kalman filter) to deliver accurate speed and acceleration measurements. GPS speedometer accuracy depends on device and satellite coverage — open sky gives best results. Not intended as a legal speed reference.

REQUIREMENTS

- Android device with GPS
- Location permission
- Camera permission for video overlay (Pro only)
- Open sky for best GPS speedometer accuracy

SAFETY NOTICE

Zero Lap GPS speedometer and performance meter is designed for drag strip, track day and passive speed reference use. Do not operate the phone while driving. Obey all traffic laws and posted speed limits.

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

What’s new

Production release