In the United States, the mobile internet user penetration is set to reach 80.6 percent of the population in 2021. Statistics show, however, that the majority of those who access the internet through their mobile devices, such as smartphones, tablets or smart watches, spend a considerably longer time on mobile apps rather than on mobile browsers. In 2015, mobile internet users in the United States spent 90 percent of their online time on various such software applications.
Some of the most popular categories of apps are dedicated to gaming, entertainment or education. Mobile social networks, including Pintrest, Twitter, Instagram, Google Plus, but especially Facebook, which as of 2016 is the leader of the mobile app market, number hundreds of millions unique monthly visitors. According to a recent forecast, Facebook is expected to reach some 143.5 million active mobile users in 2016 and almost 167.4 million in 2020 in the United States alone.
Social networks are the most popular type of mobile apps in the United States - as of March 2016, virtually every mobile device user had one or the other social app installed. Utility and productivity apps rank next, followed by retail apps. Mobile shopping apps are used for many reasons, the most common being loyalty or rewards points, along with in-app coupons or discounts.