Laptrap

Laptrap turns your smartphone into a lap timer for RC car racing using only the phone's camera. Laptrap uses AI-based ID marker recognition to capture lap times with precision down to 0.01 seconds, announces lap results with voice prompts, and automatically saves driving logs that can be exported as CSV for further analysis. Setup is simple: attach an AR marker to each car, and optional Bluetooth master/slave support lets you separate the measurement camera from a handheld monitor for flexible trackside use.

Key Features

Laptrap can measure lap times for up to 50 cars simultaneously, making it suitable for amateur races and club events. High-precision AI recognition records lap times to 0.01 seconds. Real-time voice announcements provide lap time updates so drivers can stay focused without watching the screen. Master/slave integration via Bluetooth allows one device to act as the measurement camera and another as a portable monitor. Automatic log management saves driving data and supports CSV export for post-session analysis.

Advantages

Laptrap removes the need for expensive transponders by using the smartphone camera and AR markers for identification. It supports large multi-car events with simultaneous timing for up to 50 vehicles and produces precise timing that helps compare and improve lap performance. Voice announcements keep drivers informed in real time, and built-in log saving with CSV export makes post-session analysis and setup comparisons straightforward.

Disadvantages

Requires an AR marker attached to each car for identification, which adds a small setup step before racing. Master/slave operation depends on a Bluetooth connection and may require two devices if you want separated measurement and monitoring functions.