iSoron/uhabits ? reverse-engineered prompt

I want to build an Android app to help people create and maintain positive habits. Let's call it Loop. It should have a clean, minimalistic, and fast interface that works well even on older phones.

The core feature is tracking habits. Users should be able to set up flexible schedules, not just daily ones—for example, three times a week or every other day. I want a "habit score" that shows the strength of a habit over time, so missing one day after a long streak doesn't totally kill their progress. The app should visualize this with detailed graphs and statistics.

It also needs reminders for each habit and some home screen widgets so users can track their progress without opening the app every time. The app must be completely ad-free, open-source, and work offline to respect user privacy. No accounts or internet required. Also, add a feature to let users export their data to a spreadsheet.