Build a calendar based budgeting app for android

Would like a calendar that bills and income can ne added, will need to have ability for calculations. I have a spreadsheet that I can show as an example. Can have recurring bills and anter one off payments so every week will update how much money is required to cover all bills.

Would like an intuitive front end that can be viewed in day/week/month view with a plus in the bottom corner to add new bill/income