Create a flutter app for habit tracking that tracks daily habits for a user. The user should be able create multiple daily tasks that he wants to track. And he should be able to group the habits into a set of groups. One the user completes a task, he is rewarded a number of points per task. The app should have a page that summarize the total score per group. And the aggregate score of all the groups of habits. This flutter app needs to be compilable for both andriod and iOS.