RedShift is a $12 universal planetarium app. Like the awesome Pocket Universe, this app from USM aims to bring the entirety of the nighttime sky onto your iOS device. Redshift uses your current location to show you precisely which stars, constellations, and planets you should be able to see. If you enable the Follow Sky option, RedShift will update what you should expect to see as you point your iPad or iPhone at different spots in the sky while you pan around. Read more