GRIDCARDCompanion
A Windows app that uploads Le Mans Ultimate race results to the GridCard mobile app
Watches LMU's Results folder. When LMU writes a race result, the companion reads the XML locally and uploads the race data — lap times, sectors, position, tire wear — to the paired phone.
Both paths install the same app. The Microsoft Store version was deliberately published for users who'd rather not download an .exe directly from a website — it's certified by Microsoft and auto-updates through the Store. The .exe is the same build — per-user install, no admin rights required; the in-app updater keeps it current.
No account required
Pairing happens through a 6-digit code from the phone app — no email, password or login.
Local parsing
Results.xml is parsed on the PC; only the structured race data is uploaded.
Unpair anytime
One tap unpairs from the phone. Reset & uninstall in the app removes the companion and deletes every LMU race it uploaded.
How it works
Three-step setup
After setup the companion runs in the system tray and uploads each new race automatically.
Install
Two install paths — same app.
Pair with your phone
In the GridCard mobile app: Settings → Integrations → LMU → Pair Windows companion. The phone shows a 6-digit code that's valid for 10 minutes. Type it into the companion to pair the two.
Race
When LMU writes a new Results.xml,
the companion parses it and uploads the structured fields. The race appears in
the mobile app within a few seconds. Existing results already in LMU's
Log/Results
folder when you pair are uploaded too — older races aren't lost.
What pairing adds
Per-lap data from each LMU race
LFM's public API only exposes race-level summaries — finish position, rating, totals. Le Mans Ultimate writes a full per-lap record to disk. The companion reads that file so each LMU race lands in the mobile app with per-lap detail attached.
What gets uploaded per racePro
Per-lap detail in the mobile app is part of the Pro subscription. The companion itself, the pairing flow and the upload pipeline are free.
- ✓Every lap time with S1 / S2 / S3 sector splits
- ✓Per-lap position
- ✓End-of-race tire wear
- ✓Pace & consistency graphs over time, per car class
- ✓Per-track records — best lap, best finish, average pace
- ✓Net positions gained and finish-position trends
- ✓Push notification on race finish with a post-race brief — Pro subscribers with a paired companion only. Fires the moment the companion finishes uploading.
Companion screens
A pairing screen on first launch, then a tabbed control panel with Status and Settings. The rest of the time the companion runs from the system tray.
Install
Both paths install the same app. The Microsoft Store version updates itself; the .exe is a per-user install that the in-app updater keeps current.
Changelog
-
v1.0.7 2026-06-01 - Start menu icon redesigned to read clearly at small sizes and adapt to Windows light or dark theme.
-
v1.0.6 2026-05-23 - Control panel reorganized into Status and Settings tabs — sync activity stays the main view, configuration lives one tap away, and the window now sizes to fit each tab.
- Autostart moved from an install-time prompt to a "Launch with Windows" toggle in Settings — controllable any time.
- Push notifications now fire for LMU races finished within the last 24 hours, including races picked up by the companion's backfill scan after launch.
- LMU Results folder confirmation is skipped when the folder is found at a standard Steam or install path.
- Microsoft Store tiles render at full resolution on the Start menu.