by Red Rat in Hat
Import a track image, plan, sketch, or satellite view and calculate the racing line, speed profile, braking points, acceleration, and lap time directly on your device. Compare point, car, and motorcycle models to see how the trajectory and calculated performance change.
Screenshots
RaceLineCalc turns your track image into a measurable 2D track and calculates its racing line.
Use it for karting circuits, permanent tracks, private layouts, or lesser-known venues when you have an image but no ready-made digital track model.
Workflow
Store availability
The Android app is available now on Google Play by direct link or QR code. Availability on other platforms has not been announced.
Google Play
App Store
If the QR code does not open, use the direct store link.
Racing calculations
RaceLineCalc solves a minimum-time trajectory optimization problem on a calibrated flat 2D track. It combines track geometry with a selected point, car, or motorcycle model to calculate the resulting racing line, speed profile, braking points, acceleration, and model-calculated lap time.
Import a track image, map, plan, sketch, or satellite view, calibrate the scale and boundaries, and turn the layout into a solvable 2D track model for racing line optimization.
The min-time solver searches for a time-efficient racing trajectory within the selected track geometry, vehicle model, grip, power, braking, and configured limits. Review the resulting racing line, speed profile, and model-calculated lap time.
Compare point-based, car, and motorcycle trajectory models with mass, power, grip, braking, steering, acceleration, and lean-related limits.
Use the race track trajectory planner for karting circuits, indoor tracks, road courses, custom layouts, and local track studies, then compare compatible runs on the same geometry.
Start with a compact model that focuses on track geometry and a configurable acceleration envelope.
Explore presets and parameters for mass, power, braking, grip, dimensions, drivetrain, and aerodynamics.
Calculate a motorcycle racing line with bike-specific presets, acceleration limits, and lean-angle results.
Review the racing line, lap time, speed, longitudinal and lateral acceleration, braking points, run history, and a two-run comparison on the same track geometry.
Core project editing and calculation run on the device without a mandatory account or project upload. Store purchases, advertising, and external links may require network access.
RaceLineCalc is a motorsport calculator for track geometry, racing lines, speed, acceleration, braking, and lap times. It does not calculate fuel consumption, pit strategy, race odds, or betting returns.
Yes. The min-time solver calculates a time-efficient racing trajectory for the track geometry, physical model, and parameters you provide. The current calculation uses a calibrated flat 2D track model.
Yes. Import indoor, outdoor, rental-kart, or custom circuit images, calibrate the scale, trace the track, and calculate the racing line.
Yes. The motorcycle model has bike-specific presets and parameters and calculates speed, acceleration, braking, and lean angle.
Yes. Completed runs include calculated lap time, speed, acceleration, and braking. The values come from the selected physical model and track geometry.
Core project editing and local calculation do not require an account or project upload. Store purchases, advertising, and external links may require internet access.
The current flat 2D model covers track geometry and selected vehicle parameters. Elevation, jumps, camber, changing grip, surface condition, weather, traffic, and driver choices remain outside its scope.
RaceLineCalc is a local-first race trajectory optimization tool: a racing line calculator, track analyzer, lap time calculator, and minimum-time trajectory optimizer in one app. It supports image-based track analysis, optimal racing line calculation, speed-profile analysis, braking-point estimation, vehicle-model comparison, and minimum-lap-time studies on a calibrated flat 2D track.