How many photos/videos a day do mobile users capture?

You can probably google it to find some stats, but its got to be several billions if you're including anything uploaded to fb, instagram and snapchat.

You may also want to distinguish between screenshots and regular images. On weekdays I probably screenshot more 2 or 3 times more than I take photos with my camera. On the weekend it's probably the opposite (because I'm playing outside or socializing).

Whoa, what a can of worms there.

on average? by location? by age? by phone model? by day of the week? by holiday or festival? by location? by time of day? are they in school or working or on vacation or sick? by data plan size? by income?

So many demographics.

What are you looking for?