In 2015, the Apple Watch was born, and the trend of wearable devices swept the world. Strictly speaking, the first-generation Apple Watch, whether as a fashion accessory or as a wearable device to solve problems, was not a qualified product at the time: the non-mainstream square screen, the system that was not smooth enough, and the battery life that was unsustainable for a day made the original Apple Watch full of slots and became a high-tech chicken rib. But this does not affect the unique position of the Apple Watch in the smart watch, just as the iPhone redefined the smartphone, the original Apple Watch also has a cross-era significance to a certain extent.
 
The birth of the Apple Watch is not to imitate traditional watches, but to be positioned as a smart terminal worn on the hand. The Apple Watch uses an unconventional square screen, which can hold twice as much information as the round screen at the same size, and it is easier to adapt to apps. The first time you use Apple Watch, it's like going back to the era of small-screen button mobile phones, although the sparrow is small, Apple Watch has many functions of a mobile phone.
 
Although the Apple Watch has a touchscreen, the scroll wheel on the crown is the most common way to operate. The small screen display information needs to be scrolled up and down frequently, the scroll wheel is a very convenient way to operate, the linear motor can also simulate the mechanical feeling of "da-da-da" through vibration when rolling, and the light press is to return to the upper menu, and most of the operations can be completed by the scroll wheel alone. The small screen is not convenient to use multi-touch such as two-finger zoom, but Apple's signature Force Touch pressure sensitive screen brings a new dimension of control, light press and heavy press have different functions in different APP, and the screen is accompanied by a "sunken" UI visual effect when repressed, and vivid and timely visual effect feedback reduces the probability of misoperation.
 
Since it is a smart terminal, the Apple Watch naturally has an independent operating system. Although the number and quality of apps on current smartwatches are not satisfactory, Apple is already a leader in them, with complete basic functions and the quality of third-party apps is also significantly ahead of other systems. At this stage, the Apple Watch has been able to independently complete many functions on the mobile phone, watching videos, opening web pages, chatting WeChat, and swiping Weibo, but the above functions are obviously not as convenient as using mobile phones, and do not constitute a reason to buy.
 
The unique advantage of the Apple Watch over mobile phones is that it continuously and closely monitors health and gives people exercise or health guidance. In addition to the simple step counting function and sedentary reminder, the Apple Watch has a 24/7 optical heart rate sensor, which can be combined with big data to better understand your health. For example, when running, the heart rate data can be used to adjust the cadence to keep the heart rate in a reasonable range, so as to maximize the effect of exercise and protect the safety of the heart. Several circular progress bars of different colors on the dial record the achievement of the day's exercise and play a role in supervision. Through long-term training and recording, you can intuitively see the improvement of various physiological indicators, which is undoubtedly the best praise for athletes.
 
In 2018, Apple Watch 4 was released, the 4th generation Apple Watch added a medical-grade electrode heart rate sensor on the basis of the optical heart rate sensor, and you only need to touch the electrode sensor on the crown with your finger for a few seconds to watch the ECG curve. But in March 2019, the Hong Kong version of the Apple Watch 4 has unlocked the feature, and it should only be a matter of time before the Bank of China lifts the ban on this feature.
 
The 3rd and 4th generations of the Apple Watch are currently on sale at the same time, and both have two watch face sizes for different arm sizes. Apple Watch is also divided into"GPS version" and "GPS cellular data version",The GPS version of the data source can only rely on the input of the mobile phone,Poor independence,But if the purpose is only for health monitoring,It is also enough to use; The GPS cellular data version has a built-in e-SIM card, comes with a network connection and independent call function, and APP data can also be received directly through the cellular network. Operators in individual cities also support one number and two terminals, and the watch and mobile phone use the same number, so you can completely get rid of your mobile phone when you go out for sports without worrying about missing important calls.
 
The price of the 3rd generation is 2000-3000 yuan, and the price of the 4th generation is 3000-4000 yuan. On the whole, the 4th generation is about 1,000 yuan more expensive than the 3rd generation, but it has undergone the largest upgrade in several years, and it is no longer recommended to buy the 3rd generation at this stage. The processor of the 4th generation has doubled the running speed, and the waiting time to open the watch app has been greatly reduced. In terms of appearance, Apple has added a full screen with rounded corners to the 4th generation, and the screen has increased by 30% while the volume of the watch is basically the same, and the soft rounded corners also make this rectangular screen closer to the mainstream aesthetics.
 
Apple has to mention Apple's huge advantages in the supply chain, the Apple Watch 4 is the first to support Bluetooth 5.0, the connection speed has made a qualitative leap, it supports the world's four major satellite positioning systems, it can obtain extremely high positioning accuracy, it has a 1000 nits high-brightness OLED screen, which can be clearly seen in sunlight, a linear motor and pressure-sensitive screen that can simulate real touch, and an electrode heart rate sensor pioneered on a smart watch, all of which are not found in other brands. Apple Watch still supports 50-meter water resistance when it has a microphone and speaker hole, even if you swim, you can wear it, and you can also discharge the remaining water droplets in the microphone through the vibration motor after being wet, and the high combination of software and hardware is also Apple's biggest charm.
 
Although the Apple Watch is already a fairly mature smartwatch, it is not recommended for non-Apple phone users, and the Apple Watch can only be used with an iPhone, and it will be greatly discounted when paired with an Android phone. It should be reminded that the complicated functions also make the battery life of the Apple Watch lower than average, with an official battery life of only 18 hours, although wireless charging is very convenient, but power anxiety will always be with you, and a charge a day is a must.