ZomokMe is a daily expense tracker. It allows you to keep track of your purchases and expenses. Furthermore, if you're splitting a check, you can divide it among your friends. It's simple to use on a daily basis, and you can clearly see your expenses as you go. It does require you to create an account in order to use it, which isn't ideal, but it otherwise works fine. The only disadvantage is that it has a social component that does not work unless your friends sign up as well.