Super Productivity
Advanced to-do & time tracker with Jira/GitHub integration. Full offline support, open-source, no cloud sync required. The power-user task manager built for developers. Time entries can be pushed back to the issue tracker, which turns tracking into billing rather than a second chore.

Super Productivity, as it opens in a browser tab.
Not sure how to add Super Productivity to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
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How to install Super Productivity as a PWA
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