At the end of the year, I always check all the "best of" lists to see if I missed anything good in the worlds of music, movies, and apps. This year, as far as apps go, the one I'm most excited about and most pertains to photography is SkyView.
I've already got all the shooting and editing apps I like (Hipstamtic, Instagram, Lo-Mob, CameraBag, AutoStitch, PhotoShop Express, etc), but what I had been searching for is something that can give me realistic sun position in a easily readable format. I've been shooting a lot of architecture and construction lately and sun position becomes so critical. Got to know when the sun is going to be where so I can catch the subject in the best possible light.
SkyView is not intended as a photography app--its mainly a stargazing tool. As an augmented reality app, it shows stars, constellations, planets, and even satellites (like the International Space Station and the Hubble Telescope) in real time as you view the sky through your Iphone camera. The really cool part is that with the planets and the sun, when you select each, the app shows their orbital paths through the sky and you can track them backwards and forward in time! When you show up in the morning to shoot a bridge, for example, and you see that the light is not quite right, you can use the app to see exactly where the sun will be in 2 hours, 6 hours, at sunset, etc, allowing you to plan your shoot accordingly and get the shots you want.