CalcTip is a fast, simple to use, basic tool for calculating a tip with the option to split the bill between friends. Did I mention that it is easy to use? Simply choose your desired percentage from 4 popular percentages or choose your own custom percentage, enter the bill amount and tap calculate. If you decide that you want to split the bill it's on the same screen, no need to re-enter the percentage or the bill amount just enter the number of people and tap calculate again. Try the 30-day demo version or spend the $3.99 for the full version and help support the little guy.