Avast Login Account comes with simple and easy user interface. The great thing about Avast Login Account is to manage multiple devices from a single portal. In case if you are a registered Avast products on multiple devices using multiple email addresses, you can pair these devices and email addresses to your account.  Avast Login at my.avast.com or id.avast.com and Manage Avast Account to Manage Services like Avast Activation, Billing Information etc.