The final shuttle mission will be a first for the iPhone. When Atlantis flies to the International Space Station this summer it will carry two iPhones to test an app, SpaceLab for iOS from Odyssey Space Research. The Houston company makes spacecraft guidance software. When the iPhone 4 came out, the company's programmers realized it could be used for a space-based experiment to test a vehicle's positioning and orientation with the smartphone's new internal gyroscope, camera, and other sensors.