Millions of people use instant messengers, but as full-featured applications, messengers take an unstable position. Primarily they were created to communicate as a free alternative to SMS-services from cell phone providers. The first messengers became very popular because they were free and accessible. Now they are slowly pushing out social networks. As many new messenger apps are being created, there is a trend where each one tries to surpass the others and offer something new. Popular messengers, WeChat, Viber, Snapcha t, Google Hangouts, WhatsApp, Telegram, all have interesting and unique functions. Each of them is aimed for a particular audience. But still, most of them do not have internal systems for marketing, so you have to pull users from social networks into instant messengers using advertisements in the same social networks. As a result, the audiences tend to be the same, and there is no sense of this change-over. The IT- developers are actively ...