SecondMonitor
Open-source live timing and telemetry companion for lap comparison across several sims.
Development status
Latest release 9.39.0, 2026-04-15. Source
Status checked automatically against the project repository at this build.
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SecondMonitor is a free, open-source companion app that shows live timing, standings, and telemetry for lap comparison across iRacing, Assetto Corsa, rFactor 2, Automobilista 2, Le Mans Ultimate, and a few other titles. It has been a popular pick in the open-source overlay space for years.
Development moved from the original GitHub repository to GitLab, where releases continue: version 9.39.0 (April 2026) added Le Mans Ultimate shared-memory support, virtual energy data, and ABS/TC info. The old GitHub repository still exists but only as a pointer to the GitLab home.
With SimLauncher: Listed as a companion-app pill on the SimLauncher homepage (as "Second Monitor").
| Supported sims | iRacing, Assetto Corsa, rFactor 2, AMS2, Le Mans Ultimate |
|---|---|
| Pricing | Free |
| License | Open source |
| Platform | Windows |
| Website | gitlab.com/winzarten/SecondMonitor |
| GitLab | gitlab.com/winzarten/SecondMonitor |