Design Any
Race Circuit
On Earth.
Drop waypoints on any real-world map — build a full closed circuit or a rally-style point-to-point stage — and get instant time estimates, corner analysis, and ten-band speed zone visualisation for seven racing classes, from Formula 1 to WRC. Or switch to human power and plan a marathon route or a triathlon course on the same maps.
Everything a circuit designer needs.
Real-World Maps
Design on a live dark map or switch to satellite view. Jump to a Grand Prix preset, search for any city, address, or place, or start right where you are with your device's location — then trace anything from Monaco to your local industrial estate.
Instant Lap & Stage Times
Complete the loop — or the stage — and get a calculated lap or stage time, top speed, minimum speed, and average speed. The model accounts for acceleration, braking, and cornering limits specific to each class.
Circuits & Rally Stages
Choose a traditional closed loop or a point-to-point stage that runs from START to FINISH. Stage mode brings rally-style timing, a WRC physics model, and per-segment tarmac and dirt surfaces — loose gravel cuts grip, braking, and top speed, exactly as it should.
Seven Racing Classes
Switch between Formula 1, GT3, MotoGP, IndyCar, NASCAR, Go Kart, and WRC profiles. Each has its own lateral acceleration limits, power curves, top speeds, and race distances. Speed zone thresholds rescale per class so the colours stay meaningful for everything from a shifter kart to a rally car.
Marathon & Triathlon Planning
Swap the race cars for humans. Plan marathon routes with elite running pace, kilometre markers, and projected times — or design a triathlon course with swim, bike, and run legs drawn as separate surfaces and timed leg by leg.
Speed Zone Visualisation
Once your design is complete, every metre of track is coloured across ten speed bands — from flat-out Full Speed red down to Crawling green — with thresholds calibrated to the selected class. Updates live as you drag waypoints.
Circuit Character Rating
The tool analyses corner density and gives your circuit a character: Ultra Technical, Technical, Balanced, or High Speed. It also counts corners, measures your longest straight, and calculates race laps needed.
Full Analysis & FIA Grading
Press A for the engineer's view: a telemetry-style speed trace, three sector splits, a corner-by-corner table with radius and lateral G, braking and overtaking zones, your closest real-world circuit matches — and the FIA licence grade your layout could apply for.
30-Step Undo History
Every waypoint placement and drag is tracked. Undo up to 30 steps with Z or Ctrl+Z. Double-click any waypoint to delete it individually. Escape clears the entire circuit.
Export: GPX, KML, XML & PNG
Send your circuit to other tools — GPX for sim software and GPS devices, KML for Google Earth, XML for raw waypoint data — or render your layout as high-resolution PNG images in ten visual styles, from Blueprint and Pencil Sketch to Neon Nights and a to-scale Satellite View. Shortcuts G, K, X, and I.
Shareable Circuit Links
Press S for an automatically shortened link that encodes your full design — anyone who opens it can keep editing — plus a ready-to-post track card image with one-tap sharing to X, Instagram, Reddit, Facebook, and email.
24 Grand Prix Presets
Jump directly to every stop on the current Formula 1 calendar, from Melbourne to Abu Dhabi. Each preset places the map at the exact zoom and location to start tracing a real circuit — and place search takes you anywhere the calendar doesn't.
Track Shaping Tools
Adjust each segment of the tarmac independently with separate left and right widths, paint fully custom run-off shapes in tarmac or gravel, place kerbs, add grandstands and paddock buildings, lay out a pit lane, and measure any distance on the map. The blue and orange handles let you shape everything by drag.
Satellite View & Visibility Controls
Switch between the dark base map and live satellite imagery. Toggle the map off entirely for a clean screenshot of just your track. Hide waypoint dots, the start/finish label, turn labels, the racing line, or the width handles independently — design the way you want to design.
Custom Turn Labels & Tutorial
Turn labels (T1, T2, T3…) appear automatically at each detected apex, but you can also manually define where a turn starts and ends and give it any name — Eau Rouge, Maggotts, the Corkscrew. An in-app tutorial walks new users through the whole tool — replay it any time from Settings, or switch it off entirely once you know your way around.
Seven classes, one track tool — and a pair of running shoes.
Formula 1
The pinnacle of open-wheel racing. Extreme aerodynamic downforce that increases with speed gives F1 cars a higher cornering limit at high-speed sweepers than at slow hairpins, producing a very different speed profile from GT3 on the same circuit.
GT3
The world's most accessible top-tier class. Less downforce and lower cornering grip than F1 means medium-speed corners are noticeably slower, giving GT3 a different rhythm through the same layout.
MotoGP
Motorcycle racing at its limits. Among the lowest cornering grip of any class — bike physics through the same corner — means slow corners are genuinely slow, but an extraordinary power-to-mass ratio makes MotoGP match F1 for top speed on long straights.
IndyCar
Open-wheel racing built for both ovals and road courses. Less downforce-dependent than F1 and with a flatter cornering profile, IndyCar rewards different layouts entirely — high-speed ovals where minimum speed barely drops, or tight street circuits where braking points decide everything. The 805 km race distance is the full Indy 500.
NASCAR
Heavy stock cars built to lean on each other for 500 km without complaint. Lower cornering grip than the open-wheel classes and a much higher mass make NASCAR loads of fun to push around long sweeping ovals or longer road circuits, with braking zones that demand respect.
Go Kart
A 180 kg shifter kart with 22 kW and no aero to speak of. The speed range is smaller, but the differences between corners are sharper, which is why the speed zone thresholds are scaled down specifically for kart-scale racing. Use it to lay out kart circuits at their natural size.
WRC Rally
A 1,260 kg all-wheel-drive rally car with 280 kW — roughly 380 hp — built for point-to-point stages and selected automatically when you choose one. Mix tarmac and dirt per segment: loose gravel cuts cornering grip, braking, and top speed, exactly as it should.
Marathon
An elite distance runner — about 21 km/h flat out — that turns the app into a route planner. Kilometre markers appear along the course, timing switches to running pace, and the laps stat tells you how many circuits of your route make the classic distance.
Triathlon
The Olympic format — 1.5 km swim, 40 km bike, 10 km run — planned as one point-to-point course. Draw swim, bike, and run legs as separate surfaces and each is simulated with its own physics: a steady open-water stroke, a flat-out bike, and running pace to the line.
From blank map to race circuit in minutes.
Choose your racer, format, and location
Pick race cars or human power, then a closed circuit or a point-to-point stage. Start from any of the 24 Grand Prix presets, search for a city, address, or place, or use your current location. The map opens on Monaco by default.
Place and adjust waypoints
Click to place waypoints. The circuit is drawn between them using a smooth Catmull-Rom spline. Drag any waypoint to reshape the track in real time. Double-click a waypoint to delete it. Right-click and drag to pan the map without placing points. On touch screens: tap to place, drag to move, long-press to delete, pinch to zoom.
Complete the loop — or the stage
With 3 or more waypoints placed, press C or click Complete Loop (Complete Stage in point-to-point mode). The analysis unlocks instantly: lap or stage time, top and minimum speed, corner count, longest straight, race laps, and ten-band speed zone colouring.
Analyse, export, and share
Switch between all seven classes — F1 to WRC — to compare how each handles your design, then press A for the full analysis: sector times, a corner-by-corner table, braking zones, and your FIA circuit grade. Press S for a short share link and a ready-to-post track card, or export as GPX, KML, XML, and PNG images.