A fab little app, gets really good reviews and is currently free on the App Store.Ratings
SkySafari is a powerful planetarium that fits in your pocket, puts the universe at your fingertips, and is incredibly easy to use!
Simply hold your device to the sky and quickly locate planets, constellations, satellites, and millions of stars and deep sky objects. Use Augmented Reality (AR) mode to blend a simulated sky chart with a real view of your surroundings.
Packed with interactive information and rich graphics, discover why SkySafari 6 is your perfect stargazing companion under the night sky.
Credit also to the OP at MyDealz for spotting this earlier
Hope it helps someone.