Tip Calculator, developed by Tue Nguyen Minh, is a free iPhone app that offers a quick and easy way to calculate tips and split the bill among friends. With its elegant and intuitive user interface, this app is perfect for anyone who wants to avoid the hassle of manual calculations.

The app is very easy to use, and entering data is a breeze. Users can simply input the total bill amount, select the percentage of tip they want to leave, and specify the number of people splitting the bill. The app then calculates the tip amount and the total bill amount, and even rounds the total value for convenience.

Overall, Tip Calculator is a great app for anyone who wants to quickly and easily calculate tips and split the bill. It offers an elegant and intuitive user interface, and its quick data entry feature makes it a breeze to use. Best of all, it's completely free to download and use.