When you log in to Feedback Genius, you are immediately presented with your Dashboard, which will give you an overview of your account.
In the top right corner, you will find the messages usage on your account for the current cycle (regardless of the marketplace(s) and time range selected)
You can use this to keep track of your message usage as time goes on, and to see if you need to make any necessary subscription changes in order to keep your messages sending.
If you would like to see this broken down by messages sent per day, you can mouse over the graph at the bottom of your dashboard (this graph will display based on the marketplace(s) and time range selected). Depending on the chosen time range on your dashboard, this will break down your account information per day.
If you like, you can also click on the "Analytics" tab see your message usage broken down by billing cycles over time.
If you need to change your plan, you can any time from your Manage Subscriptions page. You can also add an Extra Message Bundle to ensure your account continues to send emails in the event you run out of regular subscription emails.