Galaxy Watch4 and Galaxy Watch4 Classic: Reshaping the Smartwatch Experience

August 11, 2021
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The Galaxy Watch4 series delivers a holistic suite of health features, an all-new OS and UI and enhanced hardware performance

LONDON, UK – 11th August 2021 – Samsung Electronics Co., Ltd. today announced the Galaxy Watch4 and Galaxy Watch4 Classic — marking a new era for smartwatch innovation. They are the first smartwatches to feature the new Wear OS Powered by Samsung, built jointly with Google, and are equipped with One UI Watch, Samsung’s most intuitive user interface yet. The Galaxy Watch4 series is bolstered with advanced hardware performance and delivers a more seamless and connected user experience than ever before. These new devices have also been completely redesigned to provide consumers with the best tools to manage their wellness.


“The last year has seen a significant rise in the number of consumers using wearables to track their health and fitness,” said Teg Dosanjh, Director of Connected Services and Technology, Samsung Electronics UK & Ireland. “As we gradually return to a more normal way of life, we understand our customers want more from their smartwatches, inspiring the upgrades we have made with the Galaxy Watch4 and Galaxy Watch4 Classic. From our innovative BioActive Sensor to our brand-new Wear OS – developed in partnership with Google – the Galaxy Watch4 series is built to give our customers a deeper, more helpful understanding of their overall wellbeing.”


Samsung’s Most Advanced Suite of Health and Wellness Features

 Galaxy Watch4 is equipped with Samsung’s ground-breaking BioActive Sensor, which boasts a smaller and more compact design that doesn’t detract from measurement accuracy. This new 3-in-1 sensor uses a single chip to precisely run three powerful health sensors — Optical Heart Rate, Electrical Heart and Bioelectrical Impedance Analysis — so users can monitor their blood pressure[1], detect an AFib irregular heartbeat¹, measure their blood oxygen level[2], and, for the first time, calculate their body composition[3]. Our all-new Body Composition measurement tool gives users a deeper understanding of their general health and fitness, with key measurements like skeletal muscle, basal metabolic rate, body water and body fat percentage. Now, you can easily check your body composition from your wrist with just two fingers. In about 15 seconds, your watch’s sensor will capture 2,400 data points.


These smartwatches come packed with an array of wellness features to track your daily activities and stay motivated to be your best. Choose from a wide range of guided workouts, enjoy Group Challenges with your friends and family, or set up a home gym by connecting your Galaxy Watch4 to your compatible Samsung Smart TV[4], where calorie counts and heartrate metrics appear on screen for easier tracking. And when you’re ready to rest, the Galaxy Watch4 series offers our most complete picture of your sleep patterns yet[5]with greater detail than before. Your compatible smartphone  detects the sounds of your snores[6],  while your smartwatch measures your blood oxygen level when you sleep3 Together with advanced Sleep Scores, you can learn more about your sleep patterns to get better rest.


The Ultimate Mobile Experience, with One UI Watch and Wear OS Powered by Samsung

 Simplicity, ease, and efficiency are hallmarks of the Galaxy smartwatch platform—and with Samsung’s brand-new One UI Watch, and Wear OS Powered by Samsung, we’ve made the smartwatch and Galaxy experience even more seamless. With One UI Watch, compatible apps are automatically installed on your watch when downloaded on your phone[7], and your important settings – like do not disturb hours and blocked callers – are synced instantly. Auto Switch[8] ensures  your earbuds can toggle audio between your phone and watch, depending on usage. You can also effortlessly control your mobile experience with Bixby voice, bezel and Gesture Controls. Move your forearm up and down twice to receive calls and rotate your wrist twice to reject them — or to dismiss notifications and alarms.


Galaxy Watch4 series is also the first generation of smartwatches to feature Wear OS Powered by Samsung —a new platform that elevates every aspect of the smartwatch experience. Built by Samsung and Google, this cutting-edge platform lets you tap into an expansive ecosystem right from your wrist – with popular Google apps like Google Maps, and beloved Galaxy services, like Samsung Pay, SmartThings and Bixby. The new platform also includes support for leading third-party apps, like Adidas Running, Calm, Strava, and Spotify available from Google Play. Along with our advanced hardware and even more intuitive user interface, you can enjoy smooth and convenient integrated experiences with your Galaxy Watch4. For example, our enhanced built-in compass works in tandem with Google Maps to make it easy to explore a new area.


Bringing Powerful Performance Directly to Your Wrist

This incredible experience is backed by serious hardware upgrades including the enhanced processor, richer displays, and expanded memory. Galaxy Watch4 series boasts the first 5nm processor in a Galaxy Watch – with 20% faster CPU and 50% more RAM, and a GPU 10 times faster than the previous generation. That means scrolling and multitasking on Galaxy Watch4 series is smooth and effortless. We also upped the resolution on the display, up to 450 x 450 pixels[9], so visuals are crisper and more distinctive. And with an impressive 16GB of memory, you’ll have enough storage to download and store your favourite apps, music, and photos – with the confidence they’re secure, thanks to Samsung’s Knox security platform.


Samsung’ leadership in eSIM technology enables users to enjoy the freedom of being able to leave their phone behind, knowing their smartwatch will automatically sync up and fill the gap[10]. We also know a reliable battery is essential to smartwatch. You can have up to 40 hours[11] of battery life, more than enough to keep a charge on an overnight camping trip – even as it supports the faster processor, higher resolution display, expanded memory and more sophisticated health features. And when you need more juice quickly, 30 minutes of charging provides up to 10 hours of battery.


Availability and Pre-Order

Galaxy Watch4 and Galaxy Watch4 Classic are available for pre-order from 11th August. Both watches showcase a sleek, iconic silhouette, with thinner cases than previous generations—and a variety of straps[12] and customisable watch faces, so your watch is uniquely you.

Devices will go on-sale 27th August 2021 in a range of stunning colours via and select partners.



Galaxy Watch4 RRP

Our modern, minimalist option designed for versatile all-day use, available in Black, Silver and Pink Gold (40mm) and Black, Silver and a sophisticated Green (44mm).


  • 40mm (Bluetooth): £249
  • 40mm (4G): £289
  • 44mm (Bluetooth): £269
  • 44mm (4G): £309


Galaxy Watch4 Classic RRP

A premium, timeless smartwatch design with our fan-favourite rotating bezel, available in Black and Silver.


  • 42mm (Bluetooth): £349
  • 42mm (4G): £389
  • 46mm (Bluetooth): £369
  • 46mm (4G): £406


Promotional Deals

Enhanced trade-in is being offered through Samsung channels and all major UK retail and operators[13]. Users can claim £100 when purchasing the Galaxy Watch4 Classic and £75 when purchasing the Galaxy Watch4 and trading in an eligible device16.

For more information about Samsung Galaxy Watch4 and Watch4 Classic, visit or To access media assets and in-depth stories, please visit our virtual press room at


Galaxy Watch4 & Galaxy Watch4 Classic Product Specifications


  Galaxy Watch4 Galaxy Watch4 Classic
Colour – 44mm: Black, Green, Silver

– 40mm: Black, Pink Gold, Silver

– 46mm: Black, Silver

– 42mm: Black, Silver

& Weight[14]
Aluminium case

– 44mm: 44.4 x 43.3 x 9.8 mm, 30.3g

– 40mm: 40.4 x 39.3 x 9.8 mm, 25.9g

Stainless steel case

– 46mm: 45.5 x  45.5 x 11.0 mm, 52g

– 42mm: 41.5 x 41.5 x 11.2 mm, 46.5g

Display – 44mm: 1.4″ (34.6mm) 450×450 Super AMOLED, Full Colour Always On Display, Corning® Gorilla® Glass with DX+

– 40mm: 1.2″ (30.4mm) 396×396 Super AMOLED, Full Colour Always On Display, Corning® Gorilla® Glass with DX+

– 46mm: 1.4″ (34.6mm) 450×450 Super AMOLED, Full Colour Always On Display, Corning® Gorilla® Glass with DX

– 42mm: 1.19″ (30.4mm) 396×396 Super AMOLED, Full Colour Always On Display, Corning® Gorilla® Glass with DX

Processor Exynos W920 Dual Core 1.18GHz (5nm Processor)
Memory 1.5GB RAM + 16GB internal storage
Battery 44mm/46mm: 361mAh, 40mm/42mm: 247mAh (typical)

WPC-based wireless charging

OS Wear OS Powered by Samsung[15]
UI One UI Watch 3
Sensors Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis), Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor
Connectivity LTE[16], Bluetooth 5.0, Wi-Fi 802.11 a/b/g/n 2.4+5GHz, NFC, GPS/Glonass/Beidou/Galileo
Durability 5ATM + IP68 / MIL-STD-810G
Compatibility Android 6.0 or higher and with more than 1.5GB of RAM[17]


All functionality, features, specifications and other product information provided in this document including, but not limited to, the benefits, design, pricing, components, performance, availability, and capabilities of the product are subject to change without notice.

Some features may not be available on non-Samsung devices. Compatible devices may vary by market, operator or device brand.

※ Google, Google Play, Google Maps, and Wear OS are trademarks of Google LLC


[1]  ECG and BP feature only to be used by 22 years+. For accurate BP readings, monthly calibration required by GP or BP monitor & arm cuff. Requires a Galaxy smartphone running Android 7.0 or above

[2] SpO2 is defined as saturation of percutaneous oxygen. Normal levels in humans are measured at approximately 95-100%. Factors like vigorous exercise, the amount of oxygen in the air, your elevation and various health conditions can all result in lower readings. This device and related software are not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease.

[3] Intended for general wellness and fitness purposes only. Not intended for use in detection, diagnosis, or

treatment of any medical condition or disease. The measurements are for the user’s personal reference only.

[4] Availability may vary on previous Samsung Smart TV models, Samsung Smart TV AU7000(2021) and above.

[5] Intended for general wellness and fitness purposes only. Not intended for use in detection, diagnosis, treatment of any medical condition or disease. The measurements are for your personal reference only. Please consult a medical professional for advice. Requires Samsung Health app version 6.18 to view history

[6]  Must be paired with Android 8.0+ and in close proximity on a stable surface.

[7] Limited to watch-compatible apps downloaded via Google Play Store. Available after connecting your watch to a smartphone. Requires the latest version of Google Play Store on your connected device.

[8] This feature is available on Galaxy Buds+ and later models, paired with Galaxy smartphones and tablets with One UI 3.1.1 or above. Certain applications may not support Auto Switch. Galaxy devices must be logged in to Samsung Account to enable Auto Switch.

[9] Based on 44mm of Galaxy Watch4 and 46mm of Galaxy Watch4 Classic; will vary by model and size.

[10] LTE connectivity only available in LTE models. Standalone voice calling and standalone text messaging on LTE version requires initial pairing with an eligible Android 6.0 or later smartphone device and separate qualifying wireless plan. Your carrier may not support standalone voice calling, or support may be available only in certain areas. Please check with your carrier for more information. Standalone functionality limited if paired phone is not powered on or connected to a wireless network.

[11] Actual battery life may vary and depend on usage conditions such as function settings, playback file type, and Bluetooth signal strength.

[12] Select interchangeable watch straps sold separately.

[13] From 11th August to 2nd November 2021. Enhanced reward to be claimed in addition to residual value of traded-in device

[14] Measured without health sensors and without strap

[15] Wear OS Powered by Samsung works with phones running the latest version of Android (excluding Go edition and phones without Google Play Store). Supported features may vary between platforms and countries with compatibility subject to change.

[16] LTE connectivity only available in LTE models.

[17] Device activation is only available after connecting to a smartphone that supports Google Mobile Services.

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