One of the more challenging aspects of living with roommates can be figuring out how to split expenses and communicate who owes money, and to whom. This app makes things considerably less complicated by not only splitting bills, but also helping with the communication aspect. Splitwise is an easier way to share bills and IOUs among friends, ensuring everyone gets paid back with less mess.
The app is free and available for iOS, Android and the web. The Splitwise app takes care of all the math and even keeps a running total over time, so people can pay you back all at once. It sends people friendly reminders via email so everyone knows when rent is due or if someone needs reminding to pay someone else back.
They also pride themselves on being "fairness experts" when it comes to split expenses, offering practical advice along the way.