You can add multiple Google accounts on your Android device. However, it considers the first account you sign in with as the default and uses it to sign you in across various Google apps and services.

You can change your default Google account by signing out of all your Google accounts, and then signing back into the one you want as your default. The first Google account you sign back into will be ...

Android-powered smartphones and tablet devices integrate with the Google account associated with the device during initial setup, giving you access to email, calendars, Google Play purchases and ...