Agent: Chat and Video Calls is an instant messaging app that's especially popular in Russia. It is completely compatible with the most popular social networks in Russia, like VKontakte and Odnoklassniki.
With Agent: Chat and Video Calls, you can do exactly the same things you would with other popular messaging apps: send messages, pictures, documents, and stickers to all your contacts that use the app. Also, you can send SMS messages for free and make phone calls from Agent to Agent without paying a cent.
Agent: Chat and Video Calls is an instant messaging app that, as is common with all apps of this type, is only useful if you have a lot of friends and contacts who use it too. The main problem is it has tough competition against other popular apps like WhatsApp, WeChat, and Facebook Messenger.