Once you set up your medications, they will appear on the "medication" section. If you want to track to ensure that you took all of your medications, just tap or click on the part of the screen after you take your medications that say "not taken". This will then automatically switch to "taken".
Note You will notice the top circle tells you how many medications you take per day. As you tap on the "not taken" buttons and the medications switch to "taken" you will notice that this number decreases by 1 for each medication you take.
This is only tracking your medications for the day and at the start of a new day, the circle will show how many medications you have left to take for this new day.