@Tiberlu. Let's take your party example. I create a group and I have a Holiday party with a bunch of friends. A few weeks later I throw a New Years Party, but this time one of the original people has moved away, one is out of town, and two new people want to participate. You could modify the group, but what if one of the participants hasn't settled up yet?

Did we figure this out? We had a couple late additions that I've invited into the group and am still waiting for them to accept the request. It is currently not recalculating to account for them which defeats the purpose of the tool. How does splitwise account for late additions OTHER than manually adding them in to each transaction?

I'm having the same problem on the iPhone app. There must be a way to do this, right?

@admin This is not the same topic with my question below.You can add the person to to previous expense manually, but do you want to do it manually? What if I already have 50 expenses to the group? Modify 50 manually? No way! I better use excel. What;s the reason of assigning the expense to the group in the first place than? If an expense is going to the group it should stay assigned to the group no matter how many person are in the group and when they were added.

Let say I create a group for Christmas Party. I add 5 friends and we start adding expenses. After the party there was another person involved. We added the person to the existing group "Christmas Party", but it still showing up as owing zero. All the existing expenses previously assigned to the Group, now are assigned to individuals that were already in the group. So now I need to go back and add the new person to all expenses manually. This doesn't make sense.

When you add a person to a group, All expenses in that group should be split to him / her also. If I want some expenses splt just for few people than I manually adjust it accordingly.