Yeah, I think in the finished version, you would always start automatically at a unique URL, and the app would auto-save.
I agree that full keyboard control would be nice. At the very least, you should be able to tab through fields.
Also, not every user understood the distinction between users and expense items, so you're right about that.
Marking items only for certain people: Hadn't planned to do it in the first version because I didn't know what the interaction would look like, but I like your solution. Also, without this feature, everything works as one page (no need to have a separate page for settling debts).
I agree that full keyboard control would be nice. At the very least, you should be able to tab through fields.
Also, not every user understood the distinction between users and expense items, so you're right about that.
Marking items only for certain people: Hadn't planned to do it in the first version because I didn't know what the interaction would look like, but I like your solution. Also, without this feature, everything works as one page (no need to have a separate page for settling debts).