The WhatsApp-owned Facebook, is making more than 100 million voice calls from users every day. That number is more than 1,000 calls per second.
If compared to Skype, a notable competitor. Skype is having about 300 million active users per month whereas WhatsApp is now at 1 billion. WhatsApp is 12 years younger than Skype and it just finished rolling out to Android and iOS in April 2015.
WhatsApp emerged when mobile apps are blooming. At the mid of the new era, WhatsApp success was because chats and its calls won't cost users any fee beside the user's own data service. While there are many other options, WhatsApp's ubiquity in the market has made it's popularity unrivaled. Skype has had its time, and it didn't somehow able to compete in the mobile era as good as WhatsApp. Skype users are more likely to be using the app on their computers instead of their mobile devices. A contrast to WhatsApp.
WhatsApp user base has been increasingly rapidly. And since being acquired by Facebook, the app remains as it was, and won't charge users for annual fee anymore.


























































































































































































































































































































































































