Today comScore released its 2017 US Mobile App Report, which among other things, lists the top mobile apps in the nation. From a report: Between smartphones and tablets, Americans spend more than half of their digital media consumption time -- 57 percent -- in apps, according to the report. That's about the same as a year ago -- evidence that the dramatic shift to mobile has now leveled out in the U.S. These are the winners, according to comScore, as measured by their penetration of the U.S. mobile app audience: Facebook (81 percent), YouTube (71 percent), Facebook Messenger (68 percent), Google Search (61 percent), Google Maps (57 percent), Instagram (50 percent), Snapchat (50 percent), Google Play (47 percent), Gmail (44 percent), and Pandora (41 percent). 8 out of 10 apps here are owned by Facebook and Google.