Watch Apple smart watch if not with Apple cell phone connection pairing just use alone, it can only support some simple activities, such as: a small click game, the landlord, look at the picture, look at the time, calculator, Almost all of these, and then more I would not dare to talk nonsense, I only say what I know and have seen, I wish the owner a happy life. iWatch can achieve the following functions: 1, message center, in fact, the equivalent of the iPhone notification center of the external display. With the vibration and speaker, you can also complete the function of reminders and alarms. 2, remote control: can be remote control Siri, iPad, iPhone, AppleTV, even Mac, can also be used as Keynote remote control. 3, gesture input: with the gas pedal, and gyroscope can realize simple gesture commands, and if the two iWatch with, can produce more complex two-handed commands. It can be turned into a standard input device for racing, boxing, ping pong, bowling and other games. 4、Attached Camera: can be turned into a Bluetooth or WiFi camera to use. Turns into a convenient FaceTime input device. Can also be converted into a surveillance device. 5, Extended Bluetooth headset and microphone: can answer phone calls and network voice video input and output terminals. 6, Portable voice and video recording device. Accessories: 1, pulse and bioelectrical wave monitoring: applied to medical treatment, sports monitoring; 2, expand power: solar charging, reserve power, sports charging device. 3、Head wear or hand strap device. Problems to be solved: Waterproof: the current bare interface is not suitable for waterproof and dustproof. Power supply: scale issues, can be thickened or utilize external additional batteries. Computational limitations: iWatch power and size are not suitable for complex computing. Flexible Device Collaboration Authorization and Complex Parameter Settings: Because the iWatch itself has a small input surface, it is possible to utilize Bluetooth communication to set up complex internal working environments directly through an iPhone or Mac. For example, WiFi connection, account settings, device authorization and so on. Because of the existence of iCloud, you can use iCloud's device management to group authorization. Bluetooth detection can also be used for pairing.