Quick ref, tips and tricks:
-You can add as many payers/payments you want.
-When some persons did not pay anything yet, you do not have to add them to the list. Just take them into account when entering the 'Number of persons' value.
-When you want to delete a payment, press the '-' button next to the payment value.
-All currency amounts shown are based on your regional settings of your Android phone.
-All data is persisted, when you start up the program again, you will see the values of the previous session.
-Click the Send message button to e-mail the payback information your friends.