DC @ Young Adult Money on March 21, 2013, 4:54 a.m.

I never thought about making money off of my mobile phone, but I think you're right - there are a few ways to do it. I think app development is overblown, but like you said, there are ways to make money simply using apps. I make money off of my Twitter account, so you could say I make money by using it on my phone.