The inteliSCOPE is an app for Android and iOS smartphones that turns the device into a tactical optic. It features multiple self-orienting reticles, 5x digital zoom, drop compensation, recording and playback options, built-in compass, GPS positioning, shot timer, and local prevailing winds.
Additionally, the smartphone can be attached to a 1913 picatinny rail using the inteliSCOPE Tactical Adapter System. It’s made from high strength composite-reinforced polymer with a ruggedized tactile rubber finish. It detaches via a quick-release toggle, can be adjusted to portrait or landscape orientation, and allows for the user to shoot around corners with no head exposure. A Nerf rail adapter also allows the user to use the inteliSCOPE on any of the N-strike Nerf blasters.
http://www.indiegogo.com/projects/inteliscope-for-shooters
Thanks to J. Smith for the tip!