This app is based on cloud technologies and includes main features (videocalls for one-to-one or groups, voice calls, instant messaging, file-sharing) and extra features like stickers, filters, synchronization with contact numbers. It’s highly secured and uses end-to-end encryption (no one can read messages, listen to calls).
One of the benefits of such an app – it’s free for users. There are no fees to use it. You can invite friend into app and create the group chat!