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APEX LAP

Know the lap time before the car is built.

APEX LAP simulates the fastest lap your car or motorcycle can drive on any circuit, and shows exactly where on the lap time is gained or lost.

Download installer Get it from Microsoft Store

For Windows 10 and 11. Sign in or create an account the first time you open it.

Vehicles
Race cars, Formula Student, road cars, EV, hybrid, motorcycles
Circuits
137 built in, plus your own GPS or x,y files
Tyres
Pacejka MF 5.2, or fit a model to your own test data
Results
More than 50 channels at every point of the lap
Speed over one lap of the FSAE Endurance circuit (Germany 2010), Formula Student car, simulated in APEX LAP 0:49.678
0 mLines at 20, 60 and 100 km/h797 m
APEX LAP comparing two Formula Student setups: speed, time difference and acceleration along the lap

What you can do with APEX LAP

Describe a vehicle and a track. APEX LAP works out speed, gear, engine speed, tyre loads and energy at every metre of the fastest lap, in seconds.

Compare setups

Run several versions of a vehicle side by side and see where each one gains or loses time.

  • Distance charts with a live time difference to your reference run
  • KPI table: sector times, top speed, peak g, full-throttle share
  • Export every result to Excel or CSV
Distance charts comparing two runs

See the lap on the map

Colour the circuit by any channel, or by the speed difference between two runs, to find the corners that matter.

  • Track maps, X–Y plots and 3D plots
  • 137 built-in circuits, imported centrelines or tracks built from straights and corners
Track maps coloured by speed and by speed difference

Find what is worth the most lap time

A sensitivity study moves each parameter up and down and ranks them by their effect on the lap.

  • Mass, grip, power, drag, downforce, balance, CG height, gearing, anti-roll bars
  • Batch sweeps of up to 25 values and a run matrix across vehicles and circuits
Sensitivity study with a tornado chart of lap-time effects

Use your own tyre data

Enter Pacejka MF 5.2 coefficients, or fit the simpler Pacejka Lite model to your test data inside the app.

  • Live force curves as you edit
  • Load sensitivity, camber and combined slip
Tyre editor with Pacejka coefficients and force curves

Cars, electric, hybrid and motorcycles

Combustion, electric and hybrid powertrains with battery energy and state of charge, and a dedicated motorcycle model.

  • Hub motors or a motor on the crank, regenerative braking
  • Motorcycles with lean angle, rider position, wheelie and stoppie limits
  • Per-wheel model with suspension, camber and racing lines for cars
Motorcycle editor with its performance envelope

Download APEX LAP

Free to download. Sign in and enter a licence key the first time you open it.

Available now

Direct download

The Windows installer. Installed copies find new versions themselves and update in one click.

Download installer

Microsoft Store

Coming soon: install in one click, without security warnings.

Get it from Microsoft Store

Installing the direct download

  1. Open the downloaded APEX-LAP-Setup.exe.
  2. If Windows shows Windows protected your PC, click More info, then Run anyway.
  3. Follow the installer, then open APEX LAP from the Start menu.
  4. Sign in, or create an account, and enter your licence key.

System requirements

Operating system
Windows 10 or Windows 11, 64-bit
Internet
Needed to sign in. After that, APEX LAP keeps working offline for up to 7 days.
Account
Created in the app the first time you open it
Licence
A licence key, entered under your account. Buy a licence