Samsung Galaxy Watch 4 vs Samsung Galaxy Watch 3

by Joseph K. Clark

At the Galaxy Unpacked event on August 11th, Samsung announced two new smartwatches to its Galaxy Watch family – the Samsung Galaxy Watch 4 and Galaxy Watch 4 Classic. In this article, we’ll look closer at the Galaxy Watch 4 vs. the Galaxy Watch 3 and compare how they hold up design, specification, and features-wise.

While we’re working on our total reviews of the Samsung Galaxy Watch 4 and Watch 4 Classic, we’ve also compiled a list of the best Watch 4 bands you can pick up today. Samsung has also announced several accessories and straps to choose from. We’ve also compared the Galaxy Watch 4 with the Apple Watch 6, in case you want to see how the best and most popular watches line up against each other.


Along with the Galaxy Watch 4, Samsung has also released the brand new Samsung Galaxy Z Fold 3 5G and the Samsung Galaxy Z Flip 3 5G. There are also new wireless earbuds, the Galaxy Buds 2. We also have lists of the best Galaxy Z Fold 3 cases and a few unmissable Z Fold 3 deals.

Samsung Galaxy Watch 4

Samsung Galaxy Watch 4 vs. Galaxy Watch 3 Specifications

SpecificationSamsung Galaxy Watch 4Samsung Galaxy Watch 3
Dimensions and Weight
  • 40mm: 40.4×39.3×9.8mm, 25.9g
  • 44mm: 44.4×43.3×9,8mm, 30.3
  • Aluminum case
  • 41mm: 41.0 x 42.5 x 11.3 mm, 48g
  • 45mm: 45.0 x 46.2 x 11.1 mm, 53g
  • Stainless steel / Titanium case
  • 40mm: 1.19-inch (396×396)
  • 44mm: 1.36-inch (450×450)
    • Super AMOLED
    • Always on Display
    • Corning Gorilla Glass with DX+
  • 41mm: 1.2-inch (360×360)
  • 45mm: 1.4-inch (360×360)
    • Super AMOLED
    • Always on Display
    • Corning Gorilla Glass with DX
ProcessorExynos W920 (5nm)Exynos 9110 (10nm)
  • 1.5GB RAM
  • 16GB Internal Storage
  • 1GB RAM
  • 8GB Internal Storage
  • LTE (model specific)
  • Bluetooth 5.0
  • Wi-Fi 802.11 a/b/g/n 2.4+5GHz
  • NFC
  • GPS
  • LTE (model specific)
  • Bluetooth 5.0
  • Wi-Fi 802.11 b/g/n 2.4GHz
  • NFC
  • GPS
  • 40mm: 247mAh
  • 44mm: 361mAh
  • 41mm: 247mAh
  • 45mm: 340mAh
SensorsSamsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis), Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor8 LED photoplethysmography (PPG), Electrocardiogram (ECG), Accelerometer (up to 32G), Gyroscope, Barometer, Ambient light
Durability5ATM + IP68 / MIL-STD-810G5ATM + IP68 / MIL-STD-810G
OSOneUI Watch (powered by Wear OS)Tizen-Based Wearable OS 5.5


The Samsung Galaxy Watch 4 is the first smartwatch with a 5nm processor – the Exynos W920 with dual-core clocked at 1.8GHz. According to Samsung, the new smartwatch offers 20% faster CPU, 50% more RAM, and ten times faster GPU performance than the Galaxy Watch 3 series. The display quality has also improved, and the performance should be a significant upgrade over the last generation, not to mention even older Galaxy Watches in the series.

The Galaxy Watch 4 and Watch 3 are available in similar sizes, and the differences in height, weight, and width are minimal and negligible at best. Both devices are made of premium materials, although the Galaxy Watch 3 was also offered in Titanium and Stainless steel versions.

It’s also worth noting the Galaxy Active line is no more since the Galaxy Watch 4 replaced it completely, which is why you may be wondering why there may be some differences between the Galaxy Watch 4 and Watch three smartwatches. The true competitor of the Galaxy Watch 3 is the newly announced Galaxy Watch 4 Classic.

The Watch 4 looks more modern, offering a simpler design with no-nonsense and minimal looks. The button design and layout on the right side have remained the same, and they still function as you would expect. However, there’s no active edge display here, like the Galaxy Watch Active series one. You can scroll up and down using the show and the buttons to navigate and trigger actions. On a side note, it’s interesting that the buttons are now replaced with flat ones instead of those found on the Watch 3.

If you are a fan of the Thom Browne Edition, you’ll be glad to know the Galaxy Watch 4 and Watch 4 Classic will be available in late September.

Health features

The Galaxy Watch 4 offers more advanced, accurate, and overall health features than the Galaxy Watch 3 series. The new BioActive Sensor offers a new 3-in-1 package that combines the Optical heart rate, electrical heart, and bioelectrical impedance analysis features into one. This gives users a new way to monitor their blood pressure, detect an AFib irregular heartbeat, measure their blood oxygen level for the first time, and calculate their body composition.

The Galaxy Watch 4 offers far more accurate results and is also a lot faster than the Watch 3 and previous generations of smartwatches from the company. Body composition, for example, can be measured from your wrist with just two fingers. In about 15 seconds, the watch will capture 2,400 data points and show you the results.

The rest of the functionality is very similar, and it can automatically detect activities and track your sleep, just like the previous generation. You can sync your data with Samsung’s applications and use other accessories to offer a more comfortable experience and view your data elsewhere.

Should you buy the Galaxy Watch 4 vs. Galaxy Watch 3?

Currently, the Galaxy Watch 4 has wholly replaced the Galaxy Watch 3. Although this is subjective, it has a more power-efficient processor, more memory, twice the storage, and a more modern design. The Watch 4 outperforms the Watch 3 in nearly everything, and it’s also worth noting it’s the first smartwatch running Wear OS 3, the new unified platform. Samsung partnered with Google to improve the smartwatch experience and created a custom version of Wear OS 3.0, One UI Watch. This looks similar to the Tizen-based platform, but it runs Android, so it also has more applications and watches faces available.

If you want a cheaper option and don’t need all the additional sensors and health features, the Galaxy Watch 3 is still a viable and great product. It has a great battery life, a great selection of watch faces, and application support thanks to the Samsung App Store, and it will undoubtedly be supported for the coming years.

You can pre-order the Samsung Galaxy Watch 4 and the Galaxy Watch 4 Classic now, and they’ll be on sale from August 27th. The Bluetooth variant for the Watch 4 starts at $249.99, while the Watch 4 Classic will begin at $349.99. The LTE version of each smartwatch will cost $50 more, so the Watch 4 will be $299.99, and $399.99 for the Classic model. Consumers who pre-order the Galaxy Watch 4 or the Galaxy Watch 4 Classic can get a $50 Samsung credit.

Roland Udvarlaki

Roland is a technology enthusiast and software engineer based in the United Kingdom. He is also a content creator and writer and is best known under “Techusiast”.

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