Simply login with either your Google ID or your Apple ID. A new account will be created for you automatically. If you do not have a Google ID or Apple ID, you can create one for free.

To login from a desktop, click the Login/Register button at the top of the page.

To login from a mobile device, click the menu icon and select the Login/Register menu item.

You will see a dialog that asks you which identity service you prefer. Once you select an identity provider, you will be taken to the web site of that identity provider to login.