A time tracking app that respects your privacy and gets the job done without getting too fancy.

Features:

Offline-only, mobile-first
For Android, iOS, and Linux
Fully private—there is no tracking / spying / advertising / etc
Keep track of tasks with multiple parallel timers that can be started with the tap of a button
Associate timers with projects to group your work (or don't)
Start, stop, edit, and delete timers whenever with no fuss
Export data as a .csv file, filtered by timespans and projects
Export the app's database for full access to all of its data
Automatic light mode / dark mode based on your device settings
Localized in several languages (thanks to Google Translate): English, Arabic, German, Spanish, French, Hindi, Japanese, Korean, Portuguese, Russian, Chinese (Simplified), Chinese (Traditional), as well as Italian, Czech, Norwegian, and Indonesian (via contributors)
Open source (licensed under Apache-2.0)—fork away!

Time Cop