Best free video calling apps 2021: Keep in touch with friends or colleagues

A WhatsApp alternative for easy calling between devices

Relatively recently brought out by Google, Duo is free to use, enables one-to-one video and voice calls and it works across both iOS and Android devices – unlike Apple's FaceTime. It's primarily an app for consumers rather than business – Google Hangouts is Google's work calling solution.

It relies on your number, lets you reach people in your phone's contacts list, offers end-to-end encryption, and has nifty features like Knock Knock, which allows you see live video of your caller before you answer.

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