On this screen you can keep track of all supplements, vitamins, or medications for the day.
The Copy button at the bottom allows to copy Vitamins and Meds from recent days. If you take the same or almost the same vitamins or supplements every day, copying them from a previous day and then editing is often faster than typing them all over again.
You can navigate between dates by tapping the arrows at the top part of the screen. To quickly return to Today's date, tap on the date.