Launched in 2010, FaceTime is Apple’s proprietary video-chat option designed for iOS and Mac users.
You can connect and place a video call using either Wi-Fi or network internet connection, but it is only available for iOS or Mac operating systems.
It is a very useful app offering high-quality audio and video even for long-distance calls.
However, data consumption is still very high, so it is best to be used on Wi-Fi networks.
Also, it supports group conferencing, but you need to be aware that you can only mute yourself in a group call.