If you own a smartphone, there’s a good chance you’ve heard of WhatsApp. In fact, WhatsApp is the world’s most popular mobile messenger application. More than 1.5 billion people use this app on a monthly basis. Let me take a moment to put that into perspective for you. Facebook Messenger has 1.3 billion active monthly users, and Skype has 300 million monthly users.
For those of you who are thinking of building a messenger app, following the lead of those who succeeded before you is always a good idea. You can learn from WhatsApp, replicate their features, and model your own app the same way.