Capture the whole drive
Record live driving or telemetry while Assetto Corsa plays a replay. Available laps, sectors, inputs, tyres, fuel, and native source data stay together locally.
Replay files must be played through AC Local-first racing telemetry
Find the lap time
hiding in your data.
TRACE records your driving, aligns every lap by distance, and shows where time was gained or lost—in a workspace made for drivers, not data engineers.
TRACE // COMPARELOCAL SESSION
LIVE DELTA−0.422sahead
01CAPTUREDrive or AC playback
02COMPAREDistance-aligned laps
03UNDERSTANDInputs, line, and corners
04SHAREPortable .trace sessions
THE QUICK ANSWER
See what changed.
See what changed.
Know what to try next.
TRACE turns raw simulator telemetry into synchronized, approachable evidence. It does not pretend a heuristic is a coach—and it never hides the underlying data.
Compare on one axis
Speed, throttle, brake, gear, steering, line, and cumulative delta remain synchronized as you seek, play, or zoom through the lap.
Keyboard seeking · 0.25× to 4× playbackFocus on the corners
Deterministic heuristics highlight measured differences in braking, minimum speed, and throttle so you can inspect the underlying telemetry yourself.
May be incorrect · not coaching adviceBring another driver's session
Compact TRACE packages preserve attribution, laps, telemetry, and an explicitly confirmed setup for inspection and comparison on another machine.
One file · no separate database or Arrow fileKeep inputs in view
Preview and customise a compact pedal, steering, and input-history HUD using demo, live, or recorded telemetry, then open it above the simulator or add its local URL to OBS.
Always-on-top window · OBS Browser Source
A SESSION, NOT A SPREADSHEET
Everything from the run,
Everything from the run,
kept in context.
Review a long race without turning the session page into a wall of rows. Open any lap for its recorded telemetry and the fuel, tyre, validity, or sector evidence the simulator made available.
- ✓ Searchable sessions, names, tags, and driver attribution
- ✓ Fastest laps, saved comparisons, and theoretical best
- ✓ Compatible setup matching and readable AC setup differences
- ✓ Missing or uncertain simulator data stays explicit
FROM TRACK TO ANSWER
Three steps. No telemetry degree required.
Record
Open TRACE, start Assetto Corsa, then drive or play a replay at normal speed. TRACE stores completed sessions locally.
Choose a reference
Use your fastest lap, a lap from an imported friend's session, or one of TRACE's compatible suggestions.
Follow the difference
Scrub or play once across every graph and the track map. Zoom from the full lap down to a sector or corner.
OPEN BY DESIGN
Your laps belong
Explore the repository ↗
Your laps belong
to you.
TRACE is local-first, simulator-agnostic at its core, and released under the MIT licence. Recording and analysis work without an account or cloud dependency.
git clone https://github.com/keystroke-tools/TRACE.git
- LOCAL FIRST
- Your complete archive stays on your machine.
- EVIDENCE BASED
- Measured facts stay separate from heuristics.
- SIM AGNOSTIC
- Simulator-specific data ends at the adapter boundary.
- PORTABLE
- Share useful telemetry without sharing your database.
TRACE v0.5.1
There is time
There is time
in the lap.
Install TRACE once, then get future releases through the app with cryptographically verified updates. Assetto Corsa is the supported simulator today; more independent simulator adapters are planned.
Windows 10/11 · x86-64 installer · Future releases update inside TRACE
SELF-HOST GO LIVE
Install or update the embedded spectator service on a Linux VM with one command.
curl -fsSL https://simtrace.run/install-server | sudo sh