After hearing the problem that the app aimed to resolve, we started from the ground up, and took a hard look at how users would interact with such an app.
We wanted to make an app that was truly beneficial to the user, and we felt that users would be looking to spend as little time on the app as possible and that this was quite possibly one of the best metrics we could use to see how successful the app was.
The user should easily be able to go in the app, add their scenarios, subjects and scores and leave feeling satisfied knowing exactly where they stand with their grades and university targets. This way, they would be able to spend more time focusing on their work and learning, rather than worrying about numbers.