isoron/uhabits ? reverse-engineered prompt

Build me an Android habit tracker app that feels clean, fast, and simple to use.

I want people to be able to create habits, mark them done each day, and see their progress over time with streaks, scores, and clear charts. It should support both everyday habits and more flexible schedules like a few times a week or every other day. Add reminders for each habit, and make it easy to check off a habit straight from the notification.

I’d also like home screen widgets so habits can be tracked without opening the app. The app should work fully offline, not require an account, and keep user data private on the device. Include export options for CSV and SQLite so users can back up or move their data later.

Keep the design minimal, lightweight, and ad free, with support for dark mode if possible. If you need to look up any current Android docs or best practices, go ahead and do that.