onRails: The Sim Racing Setup App
You won’t get better setup advice, you will just take longer to find it
onRails – The race engineer in your sim cockpit. A complete two-tool setup workshop, rebuilt from the ground up as a transparent overlay that runs on top of your sim.
Launching July 2026 on Steam.
Wishlisting helps us launch — and you’ll get notified the moment it goes live.
10 years on Steam. 17 years of building setup tools for sim racers.
onRails is our biggest release yet — combining and replacing both Virtual Race Car Engineer and Setup Developer Tool into a single, redesigned app.
What’s New
Transparent OverlayRuns on top of your sim. No alt-tabbing. No second monitor required. |
Two Tools in OneThe Setup Developer builds your baseline. The Setup Engineer tunes it lap by lap. |
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Direct Sim IntegrationAuto-detects your sim and reads tire temps and lap times live from the following supported simulators – Assetto Corsa · Assetto Corsa Competizione · Automobilista 2 · iRacing · Le Mans Ultimate · rFactor 2 Any and all other sims still supported via manual entry of tire and lap data. |
In-Race EngineerA first-of-its-kind keyboard assistant that gives you race session adjustable setup recommendations while you’re driving. |