In your ear
Brake markers
Learned from your best lap and from the fastest drivers on track with you. A countdown HUD ticks you into each braking zone.
Times
Every car’s best lap from your sessions, kept by iRacing season week. Switch to Worldwide to race the fastest Kerbline drivers. No account needed.
Debrief
A radio debrief after every run: where the time is, what changed since last time, and one thing to work on. Tap a corner and the coach drills it with you. It remembers every track and gets sharper each session.
Dynamic Island
Your delta, lap time and the coach’s words, lighting up as they’re spoken. See-through, and out of the way when you leave the car.
Tip
Phone
Scan a code and your phone becomes a dashboard: delta, lap times, fuel and the coach’s calls. Same Wi-Fi, no app store, no account.
More sims
Kerbline also coaches in Assetto Corsa Competizione and Assetto Corsa. Start the game and it switches over by itself.
Privacy
Kerbline reads iRacing’s telemetry locally. Nothing leaves your computer unless you connect an AI for answers between laps.
Fair play
In official sessions it switches to lap times, fuel and safety only. No brake cues, no technique tips.
Questions.
Does it work in official races?
Yes. In official sessions Kerbline switches to fair-play mode: lap times, fuel and safety only. No brake cues and no technique tips.
Will it cost me frames?
It runs quietly in the background. The overlays redraw a few times a second and step aside when you leave the car.
What do I need?
Windows 10 or 11 and iRacing, Assetto Corsa Competizione or Assetto Corsa. For the overlays, run iRacing in a borderless window.
Does my data leave my PC?
No. Kerbline reads the telemetry locally. Only when you connect an AI for answers between laps does your question leave it.
Which cars and tracks?
All of them. Brake markers are learned from your own laps and from the fastest drivers on track with you.
Do I need an AI key?
No. Kerbline answers the questions drivers ask most on its own: your gap, the time you need, where you’re losing time, brake points, fuel, how you’re improving. Connect a free AI key only if you want open conversation.
Does it learn?
Yes. It remembers every car and track you drive: your best, the corners that cost you and how fast you react to a brake cue. Each session starts where the last one left off.
What’s chase mode?
When you’re really chasing someone, past lap one and within two seconds, Kerbline times you both through every corner, speeds included. It tells you where you’re quicker, where they get away and where to make the move. The overlay shows who and how far.
Does it sound like a real race engineer?
Push push when there’s someone to catch. Save the tyres when one runs hot in a long race, engine temps when you sit in the tow, and a spotter that calls a stopped car ahead the moment it happens, with no delay.
Does it help with setups?
Yes. The setup engineer reads your telemetry, spots understeer and oversteer on entry, mid-corner and exit, and tells you what to change. Say yes and it moves your brake bias for you. It also ranks the setups you’ve driven by your best lap at each track.
What does it cost?
Nothing. Kerbline is free.
Download for Windows
Version 0.3.0 · 93 MB · Installs just for you, no admin rights · Updates keep your settings and lap times · New apps can get a Windows SmartScreen notice: choose More info, then Run anyway
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