How to settle up
In the dark block at the top of the group, tap Settle up. The app suggests who should pay whom, in the fewest transfers possible — with four people, three payments do it, instead of the twelve you would get from settling every pair.

In the dark block at the top of the group, tap Settle up. The app suggests who should pay whom, in the fewest transfers possible — with four people, three payments do it, instead of the twelve you would get from settling every pair.
