According to comScore’s new Mobile Metrix 2.0 report released Monday, Facebook’s mobile usage is on the rise. In fact, the report revealed that Facebook users spent more time accessing the social network on smartphones than on computers in March. Facebook users spent an average of 441 minutes — or 7 hours, 21 minutes — accessing the social network via smartphones during the month. By comparison, users spent 391 minutes — or 6 hours, 31 minutes — checking out Facebook on PCs. The comScore report also revealed that smartphone users spent more time on Facebook than on any other social media network, including Twitter, LinkedIn, Pinterest and Foursquare. In fact, Facebook is the second largest mobile property behind Google. The social network garners more than 78 million unique monthly smartphone visitors, 81 percent of which access Facebook through its mobile app.