It’s small size is a good thing however, since it’s an indoor helicopter, and if it was any larger it might be cumbersome to move around. The iSpy Helicopter is a little device, measuring in at just 7.7 x 1.7 x 4.2 in. How well does it work? Read on to find out. With just your iPhone, a special app, and a small transmitter that plugs into your headphone jack, you can pilot your own mini helicopter. If you’re familiar with the concept of the Parrot AR Drone, the iSpy Helicopter will immediately make sense. From credit card readers to lightbulbs to fitness accessories, it seems like almost anything can be controlled with an iPhone now. Since the introduction of the App Store, developers have been writing applications that attempt to extend the usability of your iPhone beyond what the device itself can do.