DeltaNerd

How it works

1. Install the Windows app. It watches your RaceStudio 3 folder and your SmartyCam SD card.
2. It uploads new sessions on its own. Files you have already sent are skipped, and an interrupted upload picks up where it stopped.
3. The site does the slow work. It reads the telemetry, matches each video to the lap it was filmed on, and trims and shrinks the video.
4. Then you compare laps here. Up to four laps side by side, with the video, the charts, the track map and a delta bar.

Free. Still being built, so parts of it are missing.