Camera-Based Detection
No hardware needed. Uses your phone's camera to detect every crossing, every lap. Works with any car. (heck, it even works with drones!)
The Free Open-Source RC Lap Timer
Your Phone Is
Your Finish Line.
No special hardware. No subscription. No Ads. Just point, draw, and race. LapTrack uses your phone's camera to accurately time your laps. Perfect for time trials, solo practice runs, and rally.
Built for the Track
Everything you need.
Nothing you don't.
Custom Trigger Zone
Draw your detection line directly on a live feed, allowing you to set up your phone at any angle to the Start/Finish line.
Real-Time Lap Audio
Configurable TTS voice announces every lap time the moment your car crosses, keeping you up to date on your performance without taking your eyes off the track.
Offline Ready
Full offline support. Letting you practice anywhere, anytime.
Easy to Use Controls
Extra-large buttons and high-contrast UI make setup fast and easy. No extra, unnecessary elements to distract you from your race.
Session History
Every session saved locally. Review lap tables, charts, and personal bests anytime.
Simple by Design
Setting up your first session takes just seconds:
Point & Draw
Open the app, aim the camera at your finish line, drag to draw your Trigger Zone on the live feed.
Lock & Calibrate
Test sensitivity, adjust trigger line width, and set delay.
Race
Hit Start. Laps are clocked automatically every time your car crosses the Start/Finish line.
Free. Instant. No App Store.
LapTrack is a cross-platform installable web app. Install it directly from your browser — no app store, no account, totally free.
Works on any device, any OS, any browser — Open the app →
iOS Safari
- Open this page in Safari on your iPhone or iPad
- Tap the Share button ⬆
- Scroll down and tap “Add to Home Screen”
- Tap “Add” to confirm
Android Chrome
- Open this page in Chrome on Android
- Tap the three-dot menu ⋮
- Tap “Add to Home Screen” or “Install App”
- Tap “Install” to confirm
Desktop Chrome / Edge
- Look for the install icon in the address bar (computer icon)
- Click it and select “Install”
- Or open the menu → “Install LapTrack”
See It in Action
