So I decided to map out my initial ideas visually to give Andy an idea of what I wanted to do.
The first 5 diagrams (left to right) are of the app as if it was being used for the first time. After that, the 6th diagram, or the main menu, would be the first interactive screen on load up. 'My Activities' would lead to diagram 4 and the selection of one of the location pins would bring up diagram 5. There are a lot more potential windows, which is why I mapped out the whole app and the relevant layers below: