to simplfy debt for each contact too. if a contact exists in more than one group then the expenses should get simplified between groups too.
I have friends who exist in more than one group. in these cases it's confusing because it tells I owe my friend money in one group but he owes me back money in another group. give me an option where I can see what I finally owe him after cancelling out the debts between groups since it is for the same person.
You should be able to do this right from the friend screen – each friend will display their total balance with you across all groups. Additionally, if you make a payment to that friend for the full amount that you owe them, then we will automatically settle up all of the different groups that you share together.
However, we don’t intend to add additional features that dynamically simplify debts across multiple groups, as we’ve found in testing that it makes the user experience very confusing. (When adding 1 new expense can change your balances across multiple groups, it becomes very difficult to understand what’s happening in your account, especially when that 1 expense was added by someone else.) We apologize for the trouble!