Google Allo

Google Allo - New app for free calls and texting from the well-known Google. It is practically no different from Viber or Whatsapp but it has its own unique characteristics, sets of emoticons and different pictures. All this is gathered in one convenient place, and there's the incognito mode, in which all your correspondence will be automatically deleted. So you don't need to worry about their security and data. No one can access them.