I frequently travel with friends. Instead of constantly splitting bills in the moment, now we can just take turns paying and track the expenses here. It can allow for couples and individuals, expenses that are only applicable to part of the group, and most anything you need. At the end of the trip, just hit Pay Back and you will get a list of who owes what to whom, in net. So simple! You could also use this for other thins besides traveling, such as event planning. Best simple app!
UnlikelyRunner about PayBack, v1.2.10