KNURL

The racing dashboard that feels like hardware

Knurl turns your iPhone or iPad into a machined telemetry instrument for your racing setup, on a wheel or a controller. Works with Gran Turismo 7 on PS5 and PS4 over your home network. No account, no cloud, no subscription.

Get notified at launch How it works

Knurl Race layout on iPad: gear, speed, lap delta, per-tire surface temperatures, and a fuel bar.

Knurl Race layout on iPhone: gear, speed, lap delta, and fuel.

60 Hz: Telemetry stream
60 fps: Locked to the stream
0: Accounts, ever
1: Unlock, forever

Six faces, one instrument

Race

Pro

The full instrument cluster for wheel-to-wheel driving.

Fuel

Pro

Consumption, laps remaining, and an honest can-you-make-it call.

Knurl Fuel and Strategy layout on iPad: fuel level, laps remaining, and pit strategy readouts.

Minimal

Free

Speed, gear, and delta, nothing else.

Knurl Minimal layout on iPad: an oversized gear number, speed, and RPM band.

Lap Compare

Pro

Two laps overlaid: speed, throttle, and brake, with the slower corner marked. See where you lost the lap, not just how fast.

Knurl Lap Compare: two laps overlaid, speed with throttle and brake traces, and the slower corner marked.

Connect

Free

Scan for your console or type its IP. No pairing code, no account.

Knurl Connect screen on iPhone: Scan for console, a found console IP, and a manual IP field.

Session Review

Pro

The engineer's timing sheet after you park: lap tables and a print-style export, in night and paper palettes.

Knurl Session Review layout on iPad in the night-print palette: lap-by-lap timing sheet with per-lap deltas to the best lap.

Knurl Session Review layout on iPad in the paper palette: lap-by-lap timing sheet with per-lap deltas to the best lap.

In detail

Fuel

Pro

Strategy with opinions

Rolling burn rate, laps remaining at current pace, target-lap math, and a pit-window hint that ends in a plain answer, not a chart to interpret.

Session Review

Pro

Read it like an engineer

See exactly which corner cost you the lap. After the stint it turns your session into a timing sheet: lap tables, a plain-English coach note, and a print-style export for your team chat.

Instrument grade

A rock-steady 60 fps, locked to the console's 60 Hz telemetry, with zero jank. No invented in-between frames: every update on screen is a real reading from the game. Gauges drawn like machined hardware, not phone UI.

Private by design

Your console and your screen, nothing else. The app talks only to your console on your home network: no account, no cloud, no analytics, ever.

Free tier that stays free

Connect, the Minimal dash, and lap timing are free forever. One lifetime unlock adds the full Race cluster and the strategy layouts. No subscription, never.

Try it with no console

Demo mode replays a real lap so you can feel the instrument before you ever connect.

Lap timing that respects the stint

Live lap, last lap, best lap, and delta to best. A session log with fuel per lap that survives app restarts and clears only when you say so.

Feels like hardware

Purposeful haptics on iPhone, a rev limiter you can feel, and gauges that never smooth away a gear change. When in doubt, we do less, better.

How it works

1Start the game on your console
2Open Knurl on the same Wi-Fi
3Race. The dash finds your console and lights up.

Works with Gran Turismo 7 on PS5 and PS4 over your home network.

Questions

What do I need to use Knurl?

An iPhone or iPad, and your console on the same Wi-Fi network. No PC, no bridge, no cables. It works the same whether you drive on a wheel or a controller.

What is the delta number?

It’s the number that tells you, at a glance, whether you’re ahead of or behind your best lap so far: green means you’re faster, red means you’re slower. It’s the quickest way to know if a change actually made you quicker.

I already have a telemetry dashboard. Why Knurl?

Most options want a PC, a companion app, or fiddly setup. Knurl runs straight on the iPhone or iPad you already own, finds the console itself, and answers in plain language: an honest can-you-make-it fuel call and where you lost the lap, not charts to read at speed. And nothing ever leaves your home network.

Which console and game does it work with?

Works with Gran Turismo 7 on PS5 and PS4 over your home network.

What's free, and what costs money?

Connect, the Minimal dash (speed, gear, and delta), and lap timing are free forever. A single one-time lifetime unlock adds the full Race instrument cluster and the strategy layouts. No subscription, ever.

Is my data private?

Yes. Knurl talks only to your console on your home network. No account, no cloud, no analytics, no tracking of any kind.

Do I have to set up my network?

No. Knurl scans for your console automatically; you can also type its IP address by hand. Start the game, open Knurl on the same Wi-Fi, and it connects.

Can I try it without a console?

Yes. Demo mode replays a real recorded lap so you can feel the instrument before you ever connect.

Is it usable if I'm color-blind?

Yes. Status never rides on color alone; every state also changes shape or label, so the dash stays readable if you're red-green color-blind.

Built by one person who cares about frame times.

Knurl is in final review for the App Store. Leave your email and I'll tell you the day it's live.

Get notified at launch