SpecBuild is the motorsport engineering companion for sim racers. Forge car setups, run pit strategy against live race traffic, and dissect telemetry with garage-floor precision.
Every feature is built from the same high-fidelity data model — nothing is faked.
Build chassis setups from the library or from scratch. Swap tyres, ride height, brake bias, and gear ratios; watch the simulated lap-time delta update in real time.
Stream, overlay, and diff telemetry runs. Throttle, brake, steering, G-forces, and tyre temps — rendered with charts you'd expect on an actual pit monitor.
Plan stint lengths, fuel loads, and tyre compounds against a live race simulator. Test "what if" scenarios before you ever leave the garage.
A curated catalogue of reference setups for each chassis in the app. Fork, tweak, and save your own — or share them with your team.
A motorsport-grade dashboard that surfaces session state at a glance: lap delta, tyre window, stint progress, and engineer notes.
Your setups and runs live on-device. No accounts, no profiling, no ad SDKs — just engineering data, the way it should be.
A short onboarding pulls your driver profile, then the garage is open.
Tell SpecBuild your series, skill level, and preferred chassis. Onboarding tunes the defaults in every tool to match your context.
Pick a reference from the Setup Library or build from scratch. Real-time lap-time deltas show how each adjustment pays off.
Upload a run, overlay two traces in Trace, and let the Pit Wall turn race strategy into a repeatable checklist.
SpecBuild turns your phone into a race engineering console. Free to download, unlocked end-to-end.
Download on the App Store →