This simple app allows you to enter a value in a U.S. Dollar amount and get the converted value into British pounds.
The user just starts the app. They put in the U.S. Dollar amount they want to convert. Then just click the 'CONVERT' button to get the amount entered in to British pounds (GBP). A Toast element pops up from the bottom and gives them the converted amount then fades away.
Screen caps taken from App running on Motorola Moto X Developer Edition running Android 5.1 Lollipop (API level 21).