It’s first-and-foremost a way for you to voice and video call up to 10 contacts (simultaneously) on i OS, and Android.
On your smartphone, this works over data (or Wi-Fi if you’re connected), so calls over Hangouts do not use any of your included minutes.
The contacts that Google Hangouts adds to your account can be both from your phone contacts, and your email contacts.
There are also a range of public chats you can join to keep in contact with your favorite brands and topics. In, an extremely easy way to host a group video chat. Just like Appear.in, Talky sells itself as “a truly simple video chat [with] screen sharing for groups”.
Again, simply pick a room name, get a unique URL, then share this URL with up to 15 people.
Viber offers free text chat, voice and video calls to anyone else who uses the app (which currently has over 800m users). Other domestic and international calls are charged at a very affordable rate, starting at just over $0.01 per minute.