Mobile app usage exploded last year, according to app analytics company Flurry. 
The categories that saw the biggest growth: Social and Messaging, which was up 203%, and Utilities and Productivity, which was up 149%. 
As BI Intelligence points out, the growth in that latter category is "an indicator that people are getting things done and using their phones as a lynchpin computing device."
chart of the day app usage
Business Insider