Push to the limit.
F1-style lap timing, OBD-II telemetry and maps — all in a single HUD designed for the track. Every tenth counts.
Everything you need on track
One app to time, read the engine and follow the line.
F1-style timing
Purple/green/yellow sectors with history+ghost benchmark, theoretical lap and live delta. Finish line and splits on the map.
OBD-II Telemetry
Connect an ELM327 adapter via Wi-Fi, Classic Bluetooth or BLE. Monitor RPM, throttle, temperatures, fuel, and MAF. Auto-priority for GPS/OBD speed.
Native maps & routes
Standard, satellite, and hybrid maps. Draw routes with waypoints or freehand, record Tours, import GPX or Google Maps links.
Advanced HUD & Widgets
Auto-merge adjacent cells. Insert minimap, sector map, and rally corner widgets, choosing F1, Rally, or Minimal styles.
Live Dashboard
Lap, delta, sectors, route, heading-up rotating minimap, rally corner indicators, analog or digital gauges, and a dynamic shift-light that adapts to the active vehicle's redline.
Ghosts & Challenges
Beat the best ghost time (dot on the minimap). The purple benchmark adapts dynamically between your record and the ghost.
GoPro & Video Editor
Connect and control GoPro via BLE. Sync video with telemetry and overlay HUD, map and data (speed, G-force, sectors) directly onto footage with the built-in Pro Editor.
External High-Frequency GPS
Support for external BLE GPS receivers (10–25 Hz: Garmin GLO, Dual XGPS, RaceBox). High-accuracy NMEA positioning that overrides the phone's built-in GPS.
Preflight Check
Pre-session checklist: verifies GPS signal, OBD connection, camera readiness and vehicle setup before hitting the track. Zero surprises.
DTC Diagnostics
Read Diagnostic Trouble Codes (DTC) with direct fault descriptions. Targeted PID selection (e.g., ECU voltage, oil pressure).
OBD-II Simulator
Built-in software simulator generating mock telemetry data. Test your HUD and custom layouts without an ELM327 adapter or real car.
Personal speed traps
Place your targets on the map. Always-on GPS background monitoring and separate records for each vehicle.
Vehicles & comparison
Built-in offline catalog. Manage multiple cars, save setups, and compare best laps and sectors on the same track.
Music control
Control play/pause and tracks for Spotify/YouTube Music (and others) without leaving the app. (Android exclusive).
Social highlights
Create vertical stories with your photos/videos and colored sector times (purple/green/yellow) ready for social networks.
Native video recordingBeta
Record track sessions with the phone's camera while syncing telemetry and lap timer in real time.
Analysis & Export
Synchronized replay on map, speed-trace, and G-G diagram. Professional export in CSV, GPX, VBO, and NMEA (Premium).
Secure diagnostic reports
Exportable debug logs for tech support. The app automatically obfuscates VIN, GPS coordinates, passwords and sensitive tokens.
Start how you want
Three modes to start the timer perfectly.
Press Start and the time begins instantly. The lap closes when you cross the finish line again.
Starting grid style: 5-light sequence with vibration feedback. The timer starts when lights go out. Also available as automatic rolling start above 5 km/h.
Arms automatically near the line: the time starts the moment you cross the start line.
Your data stays yours
The developer does not receive, sell or use your session data for tracking. Location, Bluetooth and sensors power local features; maps and purchases use the official Google, Apple and store services described in the policy.
Download Razorline
Available for free on iOS and Android.