The main function of our application is currency conversion. First, you need to enter the amount of money you want to convert, and then select two or more countries. The APP will display the results of the conversion on the screen. In order to make the APP practical, we optimize the design in the user's operation. Users only need to turn the 3D page turning, which makes it easy to select different countries without manual input. Of course, you can also select countries by searching. Tip: if you need to cancel the keyboard, you must turn the 3D page turning, because the design process of our APP is to input the amount of conversion required, and then turn the 3D page turning to select the country. When you're done, you can go back to the first screen and see the information you need.