This app is designed to calculate college GPA's. The calculator is based off of a 4.0 scale where A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0 and so on. At the main screen you enter how many courses you are taking and the application will take you to a new screen to calculate your GPA. You are able to select anywhere between 3 and 5 courses. If you are taking fewer than 3 courses, the calculator will still work. You just enter the information for the courses that you have. This app is great for finding out what you need to receive in your courses to achieve a certain GPA.