I am looking for an app that is user friendly for splitting bills with a roommate and to track if I owe or she owes... if there is such a thing... for example May: Rent $1000 / 2. I paid $1000 , Roommate owes me $500 Cable Bill: $100 / 2. She paid $100, I owe $50. Electricity: $50 / 2. She paid $50. I owe $25. Does such an app exist? Thanks.