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.
2.7.5
October 21, 2026
• Fixed overlay handling for dual-camera recordings. • Improved the front-camera control so you can choose one or both cameras in your video.
Lap analysis, video overlays and advanced telemetry.
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.
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.
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.
Yes, the app supports compatible external GPS and OBD data sources. This allows for more comprehensive data logging and analysis during your track sessions.
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.
Based on the provided data, G-Box Lap Timer is currently only supported on iPhone. It is designed to work with iOS devices.
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.
No, G-Box Lap Timer does not contain advertisements. The app is free to download and use without any ad interruptions.
