This is companion app for Prototypr for OS X which is available on the Mac App Store.
Prototypr for OS X is a hand-crafted app to help you build stunning iOS app prototypes rapidly and easily.
Import images from Photoshop, link the screens, upload the result onto an iOS device over WiFi and show it off to your fellow developers and product owners. Want to showcase the design on a bigger screen? Run the prototype directly on your big and beautiful Mac screen or over a projector. All this is a snap with Prototypr. And a joyful one.