What is LapperSnapper?
Last updated Sep 25, 2026
LapperSnapper is a lap-analysis app for karting and track days. It pulls sessions straight from your data logger, analyzes them on your phone, and shows you where the time is — right at the track, with no laptop and no waiting on a server.
What it works with
- AiM MyChron 5, 5S, and 6 — downloaded directly over Wi-Fi
- RaceBox GPS devices — live over Bluetooth, or imported from a file
- GoPro cameras that record GPS telemetry
- Your phone's own GPS — no hardware needed at all
Every source feeds the same analysis engine: track map and racing line, sector times, lap comparison, corner-by-corner coaching, and a live predictive HUD while you drive.
Key things to know
- It works offline. Session analysis runs on your phone, so you can use it in the paddock with no signal.
- No account is needed to record, import, or analyze sessions.
- The core app is free forever. A Pro subscription adds coaching on every corner, your full season history, the live predictive HUD, and cloud backup. See What's included in Free vs Pro.
- It also runs in a web browser at app.lappersnapper.com, for reviewing and importing sessions on a computer. Recording and logger downloads stay on the phone. See Use LapperSnapper in your web browser.
Ready to try it? Start with Record your first session with just your phone.