It’s no surprise that Facebook (NASDAQ: FB) and Alphabet‘s (NASDAQ: GOOG) (NASDAQ: GOOGL) Google make the most popular apps in the United States. Both have billions of users around the world for multiple services. Indeed, a recent report from ComScore found that 81% of users had the Facebook app installed on their smartphone and 71% installed YouTube. The two tech giants dominated the top-10 most popular apps.