Yes, I know. There are lots of these and anyone with half a brain can calculate a tip or split a bill into thirds in their head. But bear with me. I often travel with several colleagues. We're all on per diems of about $50 day for meals. It's not unusual for six or more of us to share a meal and confront a server who doesn't want to split the bill. So I need a bill splitter and a tip calculator. What I want is an app that allows me to enter the number of diners and then to enter and attribute individual items from the bill to each of the diners. The app keeps a running total for each diner and then splits the tip and tax proportionately. This ain't rocket science. If I had the time and inclination I could build such an app in Excel. But oddly enough I can't find an app that does this. The best I've found is "TippoBilloSplitamus" that, like others, requires me to total each diner's subtotal unless I want to split the bill evenly. I suspect I'm not alone in this. And I suspect others have daily per diems in their travels. It would be a bonus to have the app keep track of my daily meal expenses and let me know how much of my per diem I've used. Yes, I know I can use an expense tracker for this. But it would be more convenient if I could use the "bill splitter" app. So does anyone know of an app that has this functionality? Or is there an ambitious developer who wants to spend a weekend or two building one?