Ahahahah, I was just thinking I will do some more work than usual today, ...well before having a lunch and reading about this meanwhile. Now I cannot stop laughing So in general they have made a patent filling for an algorithm that will split each one's bill at a rest. or bar. Sounds like a joke, but it's not! It may be a parody, but fact! Maybe in the future updates they will take into consideration the tooth-stick and table-napkins use, or maybe count each one's alcohol percentage (in order everything to be fair)?! Here and here are some sources about it. Any thoughts guys?
I don't think they're the first ones to think of this..and I also don't think they'll be the last. Go and google apps to "split the bill" and you'll find plenty of them out there.