Looking at mobile time spent on these sites, users spent the most time on Gmail, with an average of 6 minutes and 42 seconds, followed by YouTube with 5 minutes and 51 seconds. Google saw an average of 4 minutes and 10 seconds of users’ time during the week, and, while users spent a lot of time on Facebook on desktop, with an average of 20 minutes and 21 seconds, they spent less time on the site via mobile than the other top five: 2 minutes and 45 seconds.
This data does not take into account mobile applications for these websites and companies. According to data from comScore’s Mobile Metrix, the Facebook app saw the most unique visitors in the US during December 2012, with more than 85.6 million. Google Maps was the next most-popular app, with 74.6 million unique visitors, and other Google properties filled out the top six apps: Google Play, Google Search, Gmail, and YouTube.