Apps were a revolutionary concept when they were first introduced.

But what if instead of switching between several different mobile apps, there was a one-stop portal for most of your needs? Well, it already exists — and it's called the "super app."

A super app allows a user to access several services from one single app.

There are already many popular super apps, including China's WeChat and AliPay, India's Paytm, Singapore's Grab, Indonesia's GoTo, Vietnam's Zalo and South Korea's Kakao.

Watch the video above to learn how super apps became a mainstay in these countries, as well as why the concept is still yet to take off in the United States and Europe.