And, much like Apple’s other iDevices, developers will be able to make apps for the device. The Apple Watch is dependent on having an iPhone nearby to feed it information from the Internet or GPS. The watch will be compatible with iPhone 5 and 6 models. Whereas the iPad, when it debuted in 2010, was essentially an oversized iPhone minus the ability to make calls, the watch appears to be a companion device. Analysts believe the market for so-called wearable devices is about to take off.