edit: And just to be clear, I don't see where it would be an issue using it in the app, as the title of that book was supposedly inspired by Jobs saying the phrase, who in turn got it from yet another book. Just wondering if the fact that it's a book title is what the issue is.
There's nothing inherently wrong with it, but my inner writer cringes, since it's a random throwback to Jobs' commencement speech, and it seems a bit out of place (especially in contrast to the previous 3 headings). I tried to come up with something short/powerful/meaningful, but in the couple minutes I've spared I've come up empty handed.
I would recommend finding a different background image for your header, as I think you could find something a bit less noisey. I like back5 with an y-offset of 540, but another stars/galaxy image would be great if you can find one available for free!
BUT. It looks great! I really wish it was available for android. Keep it up, this is a win for you to remember :)