In the main screen you can see a chronological list of every address that you've sent Ether to. If you are connected to a node with transaction tracing enabled, the main screen will also show addresses from which you received Ether from.
A single list item (3) consists of the address of the recipient/sender (1) and its identicon (2).
You can create a new transaction by tapping the button in the bottom left side (5) of the screen. Then you have 3 options: either type in the receiving address manually, use the content of your clipboard, or scan the address with your camera.
In the menu you find information about your currently active account. Its address (1) and identicon (2), and its current balance translated to your home currency (3).