Android project need some advice

I am currently choosing a project between creating either a budget controlling app which will allow end user to input their income into the app and then input their expenses. The expenses will then be displayed in insightful visualization [i.e graphs, charts etc] I was also planning to show monthly/yearly expenses in graphs so that user can see how much they are spending etc.

Another one I was thinking of was a bill sharing app which can be used by like students in a sharing household. Each of them can have an account were one person will assign everyone to a household. In there, they can add their bills and how many people it needs to be shared with. This will then give them the current amount each person needs to pay.

Does any of these sound like a good final year project that can get a good score?

I am welcome to other ideas, was mainly looking at web apps or android apps. Don't want to take on something that is too ambitious but something that can be completed. [I am studying computer science with business management]