Control and Navigation: Compared with Samsung’s previous products, your interaction with Galaxy Watch hasn’t changed much, but in general, you can interact with Galaxy Watch by rotating borders, touch screens and the Home & Back buttons of entities. You can also use Bixby, which will be described in more detail later. The old Samsung Gear watch packages the old Tizen 3 with an annoying quirk. In this case, screen timing will get you back to your watch the next time you wake up: if you are interrupted while doing something, it will be annoying. Increasing screen overtime solves this problem, but affects battery life. With Galaxy Watch carrying Tizen 4.0, this problem has been solved. A new “Show Last Application” setting allows you to specify how long an application will remain available after the screen timeout. Combining touch screen and rotating border with Tizen 4.0 UI, Galaxy Watch is a very useful product.
Hardware: Galaxy Watch of both sizes uses Samsung’s super AMOLED display with a resolution of 360×360. The screen size of 46 mm Galaxy Watch is 1.3 “leading to 282 DPI, while the screen size of 42 mm version is smaller, 1.2”, but the pixel density is higher, 302 DPI. The quality and color rendering of the display meets Samsung’s consistent standards, and the content looks great, while the light sensor provides a display that we can watch under all lighting conditions accordingly.
As expected, the smaller 42 mm Galaxy Watch has a 270 mAh reduction in battery capacity compared with the larger 472 mAh. Samsung’s Galaxy Watch 46mm battery lasts up to seven days, while the 42mm battery lasts up to four days. We will describe this in more detail later. All variants of Galaxy watch use Samsung’s new Exynos 9110 dual-core SoC, which runs at 1.15 GHz. This more efficient 10nm SoC is designed for smart watches and can save extra battery life compared to the 14nm Exynos 7270 SoC that drives Gear S3 and Gear Sport.
The new 9110 SoC seems to be okay. During our Galaxy Watch usage, the UI remained fluent, and there were no slowdown or other performance problems with the application. Although the new processor is a welcome improvement, Samsung’s decision to reserve 4 GB of storage only for applications and media remains to be discussed. After installing the Spotify application, we got 1.43GB of free space through our 52MB 10 track test album (coded 160kbps) and screenshots several times. We envisage that users who use a large number of media or applications may encounter difficulties. 768MB RAM can make everything work, and if you use LTE version of RAM, memory will double to 1.5GB. The higher the memory capacity of the LTE model, the better the overall performance may be, but this cannot be verified.
In addition to the new heart rate sensor, Galaxy Watch’s fitness function is supported by some common functions, such as accelerometers, barometers and gyroscope sensors. Connect to your smartphone and wireless headset via Bluetooth v4.2. Wi-Fi 802.11 b/g/n 2.4 GHz allows Galaxy Watch to connect to your wireless network. The 3G/LTE version of the built-in eSIM completely breaks your dependence on smartphones. NFC supports Samsung Payment because Samsung seems to be giving up MST, which allows Samsung to simulate any of your magnetic stripe-only credit cards. It’s worth noting that unless you have a smartphone that supports Samsung Payment, you can’t set up and use Samsung Payment on Galaxy Watch. Position tracking is provided by airborne GPS/GLONASS.
Modified Human Resources Management: Samsung has not yet made any specific statement on human resources management, but the sensor seems to be a completely new module designed for Galaxy Watch. In fact, every smart watch with a heart rate monitor uses spectroscopy. Blood is red because it reflects red light and absorbs green light. Therefore, by using green light-emitting diodes and photodiodes to measure light absorption, our smart watches can detect the amount of blood flowing through the wrist. The new sensor on Galaxy Watch combines a green LED with four photodiodes, while Gear S3 and Gear Sport combine two green LEDs with one photodiode. For comparison, our Garmin Fenix 5 uses three green LEDs and a larger photodiode, while Apple Watch uses a pair of green LEDs and a photodiode.
In our Samsung Gear Sport evaluation, our comparative testing of human resources management was very bad. Therefore, we are pleased to determine whether this new arrangement will have a real impact, which we will discuss more later. Galaxy Watch will continuously monitor your heart rate throughout the day. The sampling rate can be set to Always (which affects battery life), Frequency (every 10 minutes) and Never (never). The HR sensor on the Galaxy watch is mounted on the case, which is 1 mm higher than the case. We like this method very much, because it can ensure that the sensor is in better contact with the skin, thus improving accuracy, and will not feel obvious in daily wear.