There are several apps on the App Store that support this need. However, this app stands out amongst all of them. First, the UI has been designed keeping in mind the simplicity and ease of use. Enter the total amount and you have a choice of common used tip percentages. If you want a custom tip, just slide the bar and choose the tip you want. Next go and use the step button to adjust the number of friends and the lower three ovals will show the total tip amount, the new bill total including tip and how much everyone has to pay.

For countries where you tipping is not common, just pull the slider to left and you will have 0 tip and can split the meal costs without tipping.

If you are alone and want to calculate the tip, you can just keep the setting to 1 person and do your own tipping calculation to round number of your desire.

Finally - if you just want to calcuate percentages of any amount - just make the people count to 1, enter any value and slide the percentage bar and you can calculate the percentages.

GIVE IT A GO - Download and try it - if you like it, keep it for FREE and give me a rating - if not, you can send some suggestions and I will try to improve.