If you're looking for a full-featured management app, look no further than iConnectHue.
It's an expensive app at $4.99, plus several in-app purchases in order to unlock more features, but it's money well spent considering everything that the app can do within a simple user interface. There is a bit of a learning curve, as you navigate mostly with swipe gestures and holding down to select some things, but it doesn't take long to get used to.
Just like with Huemote, you can group lights together and easily change colors in a group. However, you can also change the individual colors of bulbs in a group without needing to separate them from the group, which can be pretty convenient.
I personally love the Notification Center widget, but it's $0.99 to unlock, so keep that in mind.