Easy to improve
Comparing laps makes it easy to spot mistakes and improve my driving with every session.
Highly Recommended
A must-have app for anyone serious about improving lap times and becoming a more consistent driver.
Free
About
This app transforms your iPhone into a GPS lap timer and driving coach. Analyze your performance with detailed telemetry, compare laps, and identify areas for improvement to shave seconds off your track times.
✓Automatic GPS lap timing
✓Live sector and delta analysis
✓Speed and G-force telemetry
✓Friction circle visualization
✓Lap comparison and analysis
✓Onboard video with telemetry overlay
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+1
What's New in G
1.1
August 5, 2026
• Sharper telemetry charts and a full-screen graph for the post-stint data debrief. • Added Friction Circle to show how completely the available tire grip is being used. • Refined corner analysis, track maps and session handling. • Added German, French and Russian localization. • Fixed bugs and improved stability.
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FAQ
What is G-Box Lap Timer used for?
G-Box Lap Timer turns your iPhone into a GPS lap timer, telemetry logger, and driving coach. It's designed for track days, HPDE, open lapping, and time attack to help drivers analyze their performance and find areas for improvement.
What kind of data does G-Box Lap Timer provide?
It provides synchronized speed, longitudinal G, and lateral G data with your position on track. You can also view telemetry traces for braking zones, turn-in, apex, and track-out, along with a friction circle to assess tire grip utilization.
Can G-Box Lap Timer record video?
Yes, G-Box Lap Timer allows you to record onboard video with a clean telemetry overlay. This feature helps you visualize your performance data in conjunction with your driving.
Does G-Box Lap Timer support external devices?
Yes, the app supports compatible external GPS and OBD data sources. This allows for more comprehensive data logging and analysis during your track sessions.
How does G-Box Lap Timer help drivers improve?
It helps drivers break down every corner by comparing selected laps with the strongest lap of the session. You can review braking points, entry and exit speeds, and identify opportunities to improve throttle application and steering inputs.
Is G-Box Lap Timer available on Android?
Based on the provided data, G-Box Lap Timer is currently only supported on iPhone. It is designed to work with iOS devices.
How often is G-Box Lap Timer updated?
The latest version of G-Box Lap Timer is 1.1, which was last updated on August 5, 2026. This indicates a recent update, suggesting ongoing development and support.
Does G-Box Lap Timer have ads?
No, G-Box Lap Timer does not contain advertisements. The app is free to download and use without any ad interruptions.