Venmo and Splitwise. These two are a godsend for living with roommates (or BF/GF/Spouse/etc). You can sub FB Pay (or any other method, even cash) for Venmo but

Venmo and Splitwise. These two are a godsend for living with roommates (or BF/GF/Spouse/etc). You can sub FB Pay (or any other method, even cash) for Venmo but splitwise is awesome.