iOS · The racing line, for real roads
Your racing
line. Real roads.
Apex brings racing-game corner guidance to your actual drive. Chevron arrows paint the line on the road ahead and glow teal when you're on pace, red when it's time to brake. Like the driving line in Forza or Gran Turismo — pointed at the canyon you're actually carving.
- 0.40g
- Peak lateral target
- 5m
- Route sampling
- 3modes
- Rookie · Amateur · Pro
58
mph
Corner ahead
Sharp R · 38
How it works
Route in. Line out.
Three steps between picking a destination and seeing the corner painted ahead of you.
- 01
Route
Pick a destination. Apex fetches the driving route and samples the road geometry every 5 meters — a fine-grained polyline of exactly where the asphalt goes.
- 02
Corner math
For every point it measures how tight the corner is and solves for a safe corner speed, then runs a braking pass backward so the warning lands early — while you can still slow down.
- 03
Live color
Chevrons paint onto the road ahead on a 3D chase-camera map. Their color reacts live to your speed — teal on pace, red when you're carrying too much into the corner.
The color language
Read the road at a glance
One glance tells you everything. The chevrons change color with your current speed — so the line is honest about the corner you're actually approaching, right now.
On pace
Teal to blue. You're inside the corner's grip budget. Hold it.
Pushing
Yellow. You're near the edge of what the corner ahead will take.
Too hot
Red. More than the corner can hold at this speed. Slow down now.
Three modes
Pick your grip budget
Each mode sets the lateral-g target the whole system solves against. More g means later braking and a hotter line — dial it to how hard you want to drive.
Rookie
0.20g
lateral target
Easing in. Arrows go red early with a generous braking margin.
Amateur
0.30g
lateral target
A confident pace for a road you know. Balanced margin.
Pro
0.40g
lateral target
Full commitment. Minimal margin — the line assumes you mean it.
The HUD
Everything you need, nothing you don't
A speedometer, a next-corner advisory card, and a BRAKE flash that fires the instant you need to slow. Plus a live G-force readout, so you can see the lateral g's you actually pulled through the bend.
- Digital speedometer, always in view
- Next-corner advisory: direction, tightness, target speed
- BRAKE flash when the corner is coming in too hot
- Live lateral G-force — your drive, measured
The math is real
No hand-waving under the hood
Apex isn't guessing. It runs real physics on the route geometry — the same relationships a chassis engineer would use.
Corner radius
R = 1 / κ
Menger curvature (κ) of the route polyline, sampled every 5 m, turns three points of road into a real corner radius.
Corner speed
v = √(a·R)
From radius R and your chosen lateral-g target (a), the safe corner speed falls straight out of the grip equation.
Braking sweep
← backward
A backward pass propagates each corner's speed upstream, so arrows turn red early enough to brake — not at the apex, when it's already too late.
Demo mode
See the whole system without leaving the couch
Hit Demo mode and a virtual driver runs Panoramic Highway for you — chevrons flowing, colors shifting, BRAKE flashing on the hot corners. It's the fastest way to understand what Apex does before your first real drive.
A word on safety
Apex's advisory speeds come from route geometry and your chosen grip target alone. They do not account for posted speed limits, road grade or banking, surface condition, weather, traffic, or anything the map can't see. Apex is a driving aid, not a substitute for judgment — obey the law, read the conditions, and drive within your own limits and your car's.
Find your line.
Apex turns every canyon road into a driving line you can see. Pick a destination and drive it like you mean it.