While some apps might say that they can record slow motion, chances are they are using software to blend frames together and interpolated pixels are created to simulate slow motion. This technique often appears stuttery and quite as smooth as a real high-speed frame rate. A new iPhone app called SloPro claims to actually record 60 frames per second on the iPhone 4. The results looks solid, but check it out for yourself. The app is free but will cost you $2 to ditch the watermark.