WhatsApp is the single most popular messaging app in the world. An estimated 1.5 billion people per month use it worldwide - 400 million a month in India alone. In the U.S. however, if you stopped someone on the street and asked them if they use WhatsApp… you’d get a lot of puzzled faces. Why is one of the world’s most popular apps practically unknown in this country? Here’s a breakdown of WhatsApp and why Americans don’t use it. SUBSCRIBE FOR THE LATEST VIDEOS VISIT DIGITAL TRENDS In our studio: BDI Corridor Media Console: Music: Digital Trends may earn a commission when you buy through links on our channels. FOLLOW US!