A passive Windows desktop app that tracks time spent sitting at your desk. It lives in the system tray, starts and stops automatically on PC lock/unlock and sleep/wake, and shows a dashboard with per-session and daily statistics.

• Automatic tracking — sessions start on unlock/wake and stop on lock/sleep
• System tray — always-visible icon with today's total sitting time as tooltip
• Dashboard — view sessions by day, week, month, or year with bar charts
• Session merging — select multiple sessions and merge them; auto-merge breaks shorter than a configurable threshold
• Sitting reminder — configurable toast notification after N minutes of continuous sitting (default: 45 min)
• Export — export sessions to CSV or JSON from the dashboard
• Crash recovery — if the app exits unexpectedly, the last session is closed at the last heartbeat timestamp
• Auto-start with Windows — registers itself in HKCU\...\Run on first launch

Grab the latest SitTimer.App.exe from the Releases page and run it — no installer or .NET runtime needed.

• Windows 10/11
• .NET 9 Runtime (or use the self-contained publish)

dotnet build

dotnet publish src/SitTimer.App -c Release -r win-x64 --self-contained true \
  -p:PublishSingleFile=true -p:IncludeNativeLibrariesForSelfExtract=true -o publish

Output lands in publish/.

Run SitTimer.App.exe. The app starts minimised to the tray — no window appears on launch.

• Left-click the tray icon to open the dashboard
• Right-click for manual Start / Stop and Quit

Settings are stored in %APPDATA%\SitTimer\settings.json:

{
  "ReminderMinutes": 45
}

Set ReminderMinutes to 0 to disable the sitting reminder.

Sessions are stored in a SQLite database at %APPDATA%\SitTimer\sittimer.db.