Cab Trade News have asked for an app to display news from their website but also include a calculator for cab drivers and also a messaging area to simplify communication between cab drivers. The calculator was certainly the most challenging part. After reviewing their requirements and interviewing several cab drivers to learn more about their needs, I created wireframes and prototypes. Furthermore, I supplied the developers with a document that explained how the calculator should work. We had two main values that needed to be calculated: The total profit, as well as the percentage of fuel expenses. The app allows all data to be exported and can be used for tax returns.