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.

The Google Play Store is the official app marketplace for Android phones and tablets. While there's a wide variety of apps and services that you can download and install from the platform for free, a ...

You can get certain Google Play apps on your iPhone, and use them to download movies and TV shows, music, and books. You can't download Android apps.