I'd like an app like productiveapp.io, but for Android.
- Set up regular productivity/lifestyle goals.
- Earn streaks and badges.
- Give push notifications to remind you to do the daily thing.
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I think LifeRPG is what you're looking for. It has all the features that you've requested and more.
Following Kidus's suggestion, I'm going to suggest Habitica. It's a similar RPG-eque habit app.