Remember the Vizzywig 4K app that shot video from your iPhone in 4K resolution? After being pulled from the App Store, they’re back — and sporting a new name. Rather than 4K, Vizzywig has now branded themselves 8K. Why the double-down in the naming scheme? Because the app has eight times the pixel density of FaceTime HD, of course. Vizzywig also says that for the best frame-rate experience, an iPhone 5S is needed. The 24 frames per second make video smoother.