Mobile applications have become the indispensable part of any contemporary person’s life. Messengers have gained the most popularity among applications. Why is that? As they provide the opportunity of satisfying the main human need – the need in an unlimited communication, herewith, totally free of charge. Nowadays hence to messengers people almost have ceased to use traditional payable texts. Thus, mobile operators call messengers the main enemies. Just imagine, there are more than one million messages sent worldwide on the daily basis!