Your Subscription receipts and invoices are accessible through the App.
To do so:
Go to Account > Billing > Billing details to access to view your current plan, payment methods and your invoice history.
Scroll to the bottom to view your invoices and click the 'open external link' box by the date of the invoice you are aiming to download. This will take you to the Stripe invoice page for the transaction.
On the Stripe page, select either 'Download Invoice' or 'Download receipt', which will then prompt a pdf download of the file you have selected.
Note that your subscription fees are charged from the card you added to Virtue automatically each month.