Google Duo

Facetime works well. The problem is you can’t use it to call any of your friends on Android. Google Duo aims to be more inclusive by bringing simple, high-quality cross-platform video calling to all devices using either Android or iOS. Set up the app — which includes verifying your cell number — and then start calling people straight from your contacts list, no distinct and dedicated account necessary (though of course they’ll need the app as well). Duo handles the rest by automatically adjusting video quality to suit current network speeds and completely encrypting all calls. Receiving a call is even more inviting with Knock Knock enabled, a Duo feature that gives you live video into what the caller is doing  even before answering.

Learn more at Google – $Free