Ive been using Group Expense for several of my trips over the years, and find it excellent for planing trips (combining info with "Tripit".)
This is a great App for one person to keep track all of the expenses paid by one person and dividing it up fairly between the other travellers with yourself.
This App is easy to use, and very customizable with currency exchanges.
I give this App a 11 out of 10
I only wish I could delete old trips!!!
MikeC39 about Group Expense, v5.1