The folio app will show you the cost of the reservation and any payments that you have made. So, you will be able to see the balance due on it. But you have to do online check in before the amounts show up. The folio app will also show you any charges that you made to the room while you are there. But it won't show you things like party tickets, mobile orders and
Genie+ charges. Those expenses are charged to a credit card when the purchases are made.