25% Of Total Time Spent On Mobile Apps Is Spent On Facebook

If you heard Mark Zuckerberg say 'mobile' multiple times in the recent past, there is some explanation for that: we spotted this stunning stat that 25 percent of the time spent on mobile apps is spent on Facebook (Source)

The 750 million they paid for Instagram looks like a great deal now.

But why do we call this 25 percent stunning? We had spotted a stat in the past that Facebook generates 1 in 4 pageviews on the Internet - to retain that number on mobile is huge, given the differences in user behavior on mobile.