So most of the apps for my phone thus far have been free.  But recently I came into possession of a (trial!) program of panoman.  The user interface for it is insanely easy. So far I've only used it twice but the results have been extremely awesome.  Example below!  Especially check out the high-res that it was taken in (take that iPhone!)

On the balcony of work
On the balcony at work

Although I'd probably barely ever use this, it's awesome for those surreal views that you can capture.  Anyways, if it's ~$5 or so, that'd definitely be worth it; especially if the license can go between phones.