The Samsung Galaxy Watch 3 is powered by a dual-core Exynos 9110 SoC and has 1GB of RAM and 8GB of storage (4.3GB usable). It has Bluetooth 5, Wi-Fi, built-in GPS, NFC, and sensors such as an accelerometer, barometer, gyroscope, ambient light sensor, and heart rate sensor. There are red LEDs and an infrared sensor on the bottom of the watch, which is used for estimating blood oxygen (SpO2) levels. The LTE version supports an eSIM for 4G connectivity, so you can receive notifications and calls when you don’t have your phone with you.
The Samsung Galaxy Watch 3 has a 340mAh battery which offers more than two full days of “regular” usage. The watch can also be charged using conventional Qi wireless chargers and smartphones that support reverse wireless charging.
The Samsung Galaxy Watch 3 can also observe blood pressure and take an ECG. However, these features aren't available on the devices sold in India for now. Also features like Samsung Pay is missing on Indian models.
The Samsung Galaxy Watch 3 works on One UI Watch Edition (v2.0), which is based on Tizen rather than Android. It's easy to understand the interface, even if you are a first-time user.
New widgets can be joined straight from the watch and you can reorder them through the Galaxy Wearable app. The clock face can be changed by long-pressing the home screen and selecting a new one. There's a good selection of apps preinstalled on the device, and you can also get lots more from the Galaxy app store. There's also the Samsung Health app, which helps you understand all the health-related data measured by the watch. Both apps are available on iOS as well as Android.
The Samsung Galaxy Watch 3 can also track sleep. Samsung has partnered with the National Sleep Foundation to better understand the readings taken by the watch. The other highlight feature is blood oxygen monitoring. The Galaxy Watch 3 tries to check SpO2 levels through your wrist.