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. Provide your reponse without using the word group.
user