The App

The paddock notebook
that knows the track.

A track-day notebook with the circuit built in:

  • Log sessions, pressures, and setup against real maps of 31 circuits
  • Numbered corners, your own reference points, and a computed reference line to study before you ride
  • Offline-first, no account, one app on iPhone and Mac
REFERENCE LINE · LAGUNA SECA COMPUTED
2.23 MI
Lap
12
Corners
212 FT
Climb
BRAKE TURN-IN APEX EXIT
Track Guides

Corner-by-corner guides, computed.

Entry, minimum and exit speeds, brake points, radii and elevation for every corner of 46 motorcycle layouts — produced by running a motorcycle physics simulation over each track's real geometry, then written up corner by corner.

Line Lab

The line, solved live.

An in-browser lap simulator on the same real circuit geometry: pick a circuit, set bike class, mass, power and grip, and watch the reference line's speed profile and lap time re-solve as you ride the sliders. Free to try — no install, no account.

Line Lab simulating Barber Motorsports Park: 1:34.35 lap readout, average and top speed, and the reference line colored by simulated speed