This is the productivity app I'd recommend to someone who's tired of productivity apps

Mushotoku is presented as a productivity app for people who feel overwhelmed by feature-heavy systems. Available via F-Droid and requiring Android 13 or newer (with an optional signed APK from the project’s GitHub releases), it’s designed to stay fully offline. The app does not declare Android’s INTERNET permission, and its local database is encrypted, keeping tasks, habits, notes, journaling entries, and personal finance records on the device rather than tied to an account or cloud service. Inside, Mushotoku combines tools like a calendar, tasks, habits, notes, mindfulness, and finance, while allowing users to disable sections they don’t need.