Try onRails. Run it on-track. SimReader connects to your sim automatically, the overlay runs on top without alt-tabbing, and both work in full. Limited access to both setup modules included.

<h2 class="bb_tag" >The best way to see how onRails fits your workflow is to run it during an actual session.</h2>This demo is built around that. SimReader connects to your simulator automatically and reads live lap times and tire temperatures. The overlay runs transparently on top of your sim, so you never leave the cockpit. Hotkeys, panel layout, and overlay mode all work in full.The demo also includes limited access to both setup modules so you have something to work with.Setup Developer: Covers the first four setup subjects: Ride Height, Springs, Anti-Roll Bars, and Weight. Pick your car type, answer questions about how the car feels, and get concrete setup changes with explanations.Setup Engineer (Lap Wizard): Log five full lap sessions. Tell it what the car is doing and get specific recommendations you can act on before the next session.Try it on-track. That's what it's built for.

onRails Demo

onRails turns your feedback into a setup personalized to your driving style. Tell it what the car's doing and it tells you exactly what to change, right on top of your sim, so you can start racing for higher positions.

<h2 class="bb_tag" >The race engineer in your sim cockpit.</h2>Two purpose-built tools, one app. Build a race setup from scratch with the Setup Developer, then fine-tune it lap by lap — and even mid-race — with the Setup Engineer. Runs as a transparent overlay on top of your sim. No alt-tabbing. No spreadsheets. No downloading someone else's setup and hoping for the best.<img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4710320/extras/7426fc7f5cddd24b6743514f639d1b06.webp?t=1783754454" width=800 height=24 /><h2 class="bb_tag" >Setup Developer Module</h2>Build your own baseline setup, one question at a time.Pick your car type and track. Answer simple questions about how the car feels in each setup area — springs, dampers, aero, brakes, differential. onRails offers valid changes at every step and builds a complete starting setup tailored to your car and your driving style. By the time you're done, you know why every value is what it is.<ul class="bb_ul"><li>Step-by-step guided build across all major setup subjects</li><li>Six car types: Sports, Touring, Open-Wheel, Stock Car, Sprint Car, Kart</li><li>Road courses and ovals, with track-trait flags (banking, bumps, chicanes)</li><li>Built-in lap logger with graph, best/average/delta stats</li><li>Pause and resume mid-session — progress is always saved</li><li>Move on straight to the Setup Engineer to fine-tune for more speed</li></ul><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4710320/extras/c5a742918554c082bf51ea1336deba39.webp?t=1783754454" width=800 height=24 /><h2 class="bb_tag" >Setup Engineer Module</h2>Fine-tune your setup until it's both comfortable and fast.You're in the ballpark but something's off. The car pushes through the apex, snaps loose on exit, won't reach top speed on the back straight. The Setup Engineer takes your driver feedback and turns it into specific, actionable changes — lap by lap, corner by corner.Lap Wizard — Log your lap time, describe the car's overall behavior, set severity, snap your tire temps with a hotkey. Get a ranked list of setup recommendations with clear explanations. Confirm a change, log the next stint, watch your times drop.Corner Wizard — When one specific corner is killing you. Pick the direction, the phase (entry, apex, exit), what's happening, and how badly. Get targeted advice that won't unsettle the rest of your lap.In-Race Engineer — A keyboard-only race assistant that takes up minimal screen space. One hotkey to toggle, numpad keys to answer 2–4 quick questions while you're driving. Get a one-line pit-call recommendation you can act on between laps.<img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4710320/extras/53ced1ff63709e1db4fadcd85c2d12c3.avif?t=1783754454" data-big-src=https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4710320/extras_big/53ced1ff63709e1db4fadcd85c2d12c3.avif?t=1783754454 width=1560 height=170 /><h2 class="bb_tag" >simReader Integration</h2>onRails auto-detects your simulator and reads telemetry directly from shared memory. Hotkeys to snap tire temps and last lap/sector times. They appear in app instantly.Supported simReader sims: Assetto Corsa · Assetto Corsa Competizione · Automobilista 2 · iRacing · Le Mans Ultimate · Project Cars 2​ · rFactor 2Any and all other sims still supported via manual entry of tire and lap data. Note: this product is not made by, or affiliated with, developers of the supported games (unless expressly stated otherwise). <img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4710320/extras/c5b1e0dd1488e905b02ec77fd6c7e39d.avif?t=1783754454" width=970 height=68 /><h2 class="bb_tag" >Built for Your Cockpit</h2><ul class="bb_ul"><li>Choose Windowed mode or Transparent overlay — sits on top of your sim, no second monitor required</li><li>Drag any panel to where you want it; position is saved for next time</li><li>Customizable hotkeys — keyboard and wheel/controller buttons</li><li>Four F1-inspired accent themes: Ferrari red, Aston Martin green, Stake F1 electric green, McLaren orange</li><li>Six languages: English, Español, Português (Brasil), Italiano, Deutsch, Français — auto-detected on first launch</li><li>Multi-monitor support — jump to any display with one click</li><li>Adjustable font size</li><li>Built-in spotlight tutorials for every panel</li><li>Includes the companion eBook &quot;Race Car Setup: Think Like a Race Engineer, Drive Like a Pro&quot; — free with your purchase</li></ul>Built for sim racers, by a sim racer.<h2 class="bb_tag" >Known Issues</h2>AMD GPU users on Eyefinity may still see reduced frame rates with the transparent overlay due to Windows compositing overhead. Disabling overlay mode in Settings restores full performance.