Android has no built-in equivalent, but supports a variety of video calling apps.
What should you do if you want to cross the signals, say video calling Apple to Android, Mac to Windows or mobile to computer?
Just tap on the name of a person with Duo and you’re immediately connected via video.
As an added treat, a feature dubbed Knock Knock lets you see who’s calling before you answer.
You’ll see the names of contacts who use and have registered with the Alexa app.
Tap on the contact you want to call and then tap on the camera icon to place a video call.
Another free messaging app for i Phones, i Pads, and Android devices, Whats App lets you text someone, make a voice call, or place a video call.