Lap Legend

Dauntless Devices LLC

In-app purchases

About this app

Use your phone or tablet to record race track laps, autocross runs, 1/4 mile passes, and more! Provides live timing, data and video acquisition, and advanced data analysis.

• Easy to Setup and Start Driving
• Superior Data Acquisition & Analysis
• GPS Lap Timing with Predictive and Target Times
• Video Capture in Single or Dual Camera Mode
• Supports DauntlessOBD for High-Performance Vehicle Data
• Advanced Data Analysis Tools to Find You More Time on Track
• Video & Data Replay of Your Theoretical Best Lap
• 2000+ Included Track Configurations
• Create and Share Your Own Custom Tracks
• Road Course, Circle Track, Autocross, Rally, Drift, and Drag Racing
• Weather Data with Density Altitude and Correction Factor Calculations


This app is intended only for sanctioned motorsports and track events. Always drive safely. Use at your own risk.

Any telemetry or messaging features are not guaranteed, and must not be relied upon for critical or safety uses.

Please see website or in-app information for details on compatible external hardware.

Ratings and reviews

Works well at various tracks, GPS is accurate

Needs voice lap times to make it perfect as it's not always easy to look down to see the time.

Great app easy to use very straightforward approach to help a driver find lower lap times

What’s new

- Side-by-side video compare of two laps
- Menu image shows track selection and weather
- Support for ELM327-compatible OBD devices (add-on)
- Performance boost for DauntlessOBD devices
- Share graphic for Segment mode runs
- Fixed rare double lap triggers when driving slowly
- Improvements in generating track images
- Renamed chart 'Time Gap' to 'Delta Time'
- Performance optimizations
- UI/UX tweaks