Tymar is local-first. Your settings and the active session live on your device; when you sign in, your projects, tasks, and time entries sync to your account so the desktop app and web dashboard stay in step. The only other network call Tymar makes is a check for updates against GitHub Releases when the app starts — updates download only if you ask for them.
Tymar keeps a small local footprint in your operating system's standard application data directory:
Signing in with Google creates an account that keeps your data in step between the desktop app and the web dashboard. Exactly three things are associated with it:
Deleting your account removes that data from the sync service. Everything listed under "What stays on your device" never leaves your machine, whether you sign in or not.
The app is open source under the MIT License. The complete source code is available at github.com/tonmoydeb404/tymar for anyone to inspect.