I go back and forth on this. It's true that your app won't feed people who're starving, at least not directly. But it's kind of incredible how many problems essentially boil down to information problems, and particularly search problems, and your app can certainly solve those. In particular, I think there's a very large supply of untapped goodwill, and a basically infinite demand for goodwill, that is not connecting right now (or connecting poorly, through inefficient charities). For some things, for some people, at some points in time, an app can help bridge that gap. For example, you could write a volunteer version of Exec where people in your community just, I don't know, <i>ask for help</i> and then someone nearby <i>gives them help</i>. Like going grocery shopping or something, or even helping cook dinner, clean the kitchen, etc. Particularly powerful for the elderly - and I think there's plenty of good kids out there who'd be happy to help an elder out for free.<p>No, it's not "changing the world" in terms of making it a utopia in one fell swoop, but it's adding a bit of the community connectivity, and making real people's dreams of making the world a better place. It's not starving kids with flies on their mouths half a world away, it's people who need help right here.