See where two laps diverge.
Replay two laps together in 3D. Compare turn-in positions, braking zones and corner-exit throttle points. Switch between overview, free camera and follow views at your own pace.
From sim to circuit · Driving data replay & comparison
Put racing lines, braking and acceleration back on track.
Review every lap from a shared perspective. Understand every difference.

01 / Replay & compare
See more than the time gained.
Understand where you gained it.
Replay two laps together in 3D. Compare turn-in positions, braking zones and corner-exit throttle points. Switch between overview, free camera and follow views at your own pace.
Follow speed, throttle, braking, steering and gear along the timeline. Use matched-progress Delta to find where time is gained or lost. Click a chart to return to that position.
Pick laps across files and save useful references to your library. Organize them by driver and note, then pick up where you left off at your next session.
02 / G-G analysis
See differences in lateral and longitudinal acceleration. Add a reference lap, speed and racing lines to build a clearer picture of each driving decision.
Open the analysis workspace
03 / Sim & real
A familiar review workflow,
across different driving environments.
Import AC or ACC CSV telemetry to compare racing lines, throttle, braking and lap times together.
Import a real-world VBO to replay GPS trajectories and speed, and compare the telemetry channels available in the file.
Turn “you can be faster here” into a specific question. Use 3D lines and telemetry to discuss different turn-in, braking and corner-exit decisions.
Pick individual laps from different files and save them by driver and note. Bring a reference back next time and keep building on what you learn.
04 / Start your review
From a recording to a focused training question.
Open Laps, enter the access PIN, then select your data source and track.
Set the scene for your reviewAdd CSV or VBO files, or load previously saved laps.
Find the two laps you want to compareSelect two laps and compare racing lines, driving inputs and time differences together.
Take a focused question back to practice05 / Plans
Start with Free today. More capabilities for coaches and teams are being planned.
Start by understanding every lap.
Enter with your team's PIN
See the FAQ below for track and channel availability.
Make feedback specific. Track the progress.
Potential paid features
Planned direction, not yet available.
Turn individual experience into team knowledge.
Potential paid features
Planned direction, not yet available.
Coach and Team are future directions. Features, pricing and launch dates are not yet confirmed. Subscriptions and purchases are not available.
06 / Before you start
We use first-party pseudonymous identifiers to measure visits and basic actions on the product pages, Laps and DEMO, to improve the experience and understand usage. Analytics does not record raw IP addresses, full referrer URLs or telemetry content. Aggregates are retained for 90 days; operational server logs are managed separately. DNT and GPC signals disable measurement. Estimated visitors are not identified people.
Select “Open Laps” and enter your team's access PIN. Choose a track from the library, add a CSV or VBO, then select a lap to replay. The product page is public; training data and replay tools require authorized access.
Trace currently supports telemetry CSV from Assetto Corsa (AC) and Assetto Corsa Competizione (ACC), plus real-world VBO. Available tracks depend on the Laps library. Real-world VBO currently supports Chengdu Tianfu International Circuit. Compare laps from the same data source and track.
CSV and VBO files are parsed locally in your browser. Only a lap you explicitly save is sent to the server for later review. Name saved laps by driver and note; saving a lap does not upload the entire source file.
Real-world trajectories retain the recorded GPS, including drift. AC/ACC recordings with G channels support G-G comparison; real-world VBO acceleration is not yet calibrated, so G-G is unavailable. A G-G distribution does not directly represent the tyre grip limit or identify an individual locked wheel. Interpret it alongside speed, racing lines, the car and track conditions.
MAKE YOUR NEXT LAP COUNT
For every purposeful practice lap.