Grasshopper is a subscription service so your bill is automatically paid each billing cycle using the credit card on file when you created your account. Your invoices are sent to you each month regardless if you selected to be billed Monthly or Annually. However, you don't need to log in online to pay your bill each time you receive an invoice as Grasshopper bills are automatically paid each billing cycle. You can change your billing information at anytime by logging in online at portal.us.grasshopper.com/login.aspx.
Note: You cannot change your billing information, contact information, pay bills, or download invoices in the mobile app.