by Red Rat in Hat
Calculate the racing line, speed profile, braking points, acceleration and lap time directly on your device. Compare five physical models and saved runs. Use the built-in track editor to prepare geometry from a track image, plan or satellite view.
Screenshots
Release update
Google Play: free app with a separate one-time Pro unlock. Microsoft Store: free app with a separate one-time Pro unlock. Steam: paid full version and a separate free demo. The planned Apple release shares one Pro purchase across iPhone, iPad and Mac. Purchases do not transfer between different stores; local prices are shown by each store.
About the app
RaceLineCalc is a racing line and lap time calculator. It optimizes the trajectory for your track and vehicle parameters; the built-in editor prepares the track geometry for calculation.
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
RaceLineCalc for your phone and computer
Android
Available
Scan with your phone camera
Open store
iPhone · iPad · Mac
In review
Scan with your phone camera
Open store
Windows
Full + Demo coming soon
Store page live
Windows
Available
Racing calculations
RaceLineCalc solves a minimum-time trajectory optimization problem on a calibrated flat 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 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 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 model covers track geometry and selected vehicle parameters. Elevation, jumps, camber, changing grip, surface condition, weather, traffic, and driver choices remain outside its scope.
Source-available Rust optimizer with public Point, Car V1 and Moto V1 models. RaceLineCalc uses a separate private solver; V2/V2.1 source and calibration are not included.
Noncommercial use, modification and redistribution are allowed. Commercial use requires written permission from PE Patsukevich Aleksandr. The TUMFTM fork link records provenance, not endorsement.
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 track.