onRails: The Sim Racing Setup App
No spreadsheets. No downloading someone else’s setup and hoping for the best. 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. |