Most tip calculator apps are really limited - they can do what a basic calculator can do, but slower. The front page is filled with these apps. Mine can do a lo

Most tip calculator apps are really limited - they can do what a basic calculator can do, but slower. The front page is filled with these apps. Mine can do a lot more - it can handle groups pretty well. And it's genuinely faster and easier to use for every use case the first page ones cover as well. Also it finds out the sales tax in your area for you. I haven't updated it because it contains a fatal flaw that, I think, keeps it from being anything more than just a better mouse trap: It can't split a single item between multiple users. It's designed for everyone to put in their own values independently. If I were to do it again, I would add a "table sharing" feature with Parse and find some decent way of splitting individual items that didn't do it by hand. It could be very novel - but tip calculators just aren't very useful. It's much faster, easier and involves less friction to do it in your head and just round out the differences. Alternatively, just ask the waiter to split the bill. It's called Tipsy Tip Calculator if you're interested.