Boys Trip keeps track of who has paid for what, and who owes who. When you go on a road trip with a group, and you share expenses, it's always a pain figuring out who owes what, and who hasn't paid for anything. So this app keeps track of who paid for say dinner and who was there. Then it keeps running totals for everyone, and shows you exactly what each person owes or is owed. It even handles multiple currencies. Perfect for a weekend trip away to a big game. A lot better that using a spreadsheet a few weeks after you get back.