Samsung Electronics today announced the expansion of its ongoing One UI 8 beta program to additional Galaxy devices. The update sets the foundation for advanced multimodal capabilities to more Galaxy devices across various form factors, along with more intuitive Galaxy AI experiences that simplify everyday routines.

Initially introduced with the Galaxy S25 series in May, the One UI 8 beta program will include the Galaxy S24 series, Galaxy Z Fold6 and Galaxy Z Flip6 beginning next week in Korea, the U.S., the U.K. and India.

In September, availability will extend to even more devices, including the Galaxy S23 series, Z Fold5, Z Flip5, A36 5G, A55 5G, A35 5G and A54.¹ Users can register for the beta program via the Samsung Members app.

One UI 8 delivers smarter, more convenient AI experiences through multimodal capabilities that understands users’ real-time context and supports more natural interactions. When paired with the Galaxy Buds3 or Buds3 Pro, users can activate Google’s Gemini with voice or by long-pressing either earbud. Designed to complement Galaxy’s diverse form factors, One UI 8 enhances productivity and efficiency while offering personalized, proactive suggestions tailored to each user.

In September, Samsung will roll out the official version of One UI 8, incorporating valuable feedback from beta program participants. The update will begin with the Galaxy S25 series and will be rolled out sequentially to other eligible devices. In addition, One UI 8 Watch will expand to more Galaxy Watch models beyond the Galaxy Watch8 series later this year, delivering motivational health features and a more refined, intuitive smartwatch interface to a wider range of users.

¹ Availability may vary by device model and market.

Samsung Electronics today announced the availability of the One UI 8 Watch update¹ for Galaxy Watch Ultra, unlocking the motivational health features and refined, intuitive interface unveiled with the new Galaxy Watch8 series to a wider Galaxy users. With the update, Galaxy Watch Ultra users now have access to powerful tools² like Running Coach, Vascular Load and Antioxidant Index — all designed to help users build healthier habits through motivational insights.

With One UI 8 Watch, the user interface is optimized to deliver essential information at a glance on a smartwatch-sized screen. Multi-Info Tiles pull everything from health metrics to weather into a customizable view, delivering the information users need, exactly when they need it. Now Bar³ ensures that whatever users are working on is always accessible. These One UI 8 Watch features integrate seamlessly with Galaxy Watch Ultra’s robust performance and durability.

Galaxy Watch Ultra remains the ultimate wearable companion for those who love outdoor adventure, all available in four stunning titanium finishes — including the newly introduced Titanium Blue. Meanwhile, Galaxy Watch8 is designed for everyday wellness with comfort and style, while Galaxy Watch8 Classic offers timeless sophistication paired with advanced functionality. Galaxy Watch8, Galaxy Watch8 Classic and Galaxy Watch Ultra in Titanium Blue will soon be globally launched.

For more details about the Galaxy Watch Ultra, visit https://www.samsung.com/galaxy-watch/.

¹ One UI 8 Watch update will be progressively rolled out to previous Galaxy Watch models. All functionality, features, specifications and other product information provided in this document including, but not limited to benefits, design, pricing, components, performance, availability, and capabilities of the product are subject to change without notice.
² Availability and features may vary depending on market, model and the smartphone paired; visit https://www.samsungmobilepress.com/feature-stories/great-health-can-happen-overnight-with-galaxy-watch for details. Not intended for use in detection, diagnosis, treatment of any medical condition. The result is for your personal reference only. Please consult a medical professional for advice.
³ Availability of functions supported within the apps may vary by market. Some functional widgets may require a network connection and/or Samsung Account login.

Evolving into a personal health coach, the Galaxy Watch8 series helps users build tailored routines with tools for sleep guidance, running coaching, antioxidant and vascular load tracking. A soft-edged cushion design and built-in Gemini, Google’s AI assistant, offer both refined aesthetics and intuitive usability.

Samsung Newsroom got an exclusive early look at the Galaxy Watch8 series during Galaxy Unpacked 2025.

▲ The Galaxy Watch8 series with the Galaxy Watch Ultra in Titanium Blue

▲ (From left) The Galaxy Watch8, Galaxy Watch8 Classic and Galaxy Watch Ultra in Titanium Blue

Bedtime Guidance: Say Goodbye to the Monday Blues

The Monday blues often stem not just from fatigue but from a disrupted weekend sleep cycle. To help recalibrate daily routines, Bedtime Guidance analyzes sleep patterns over the past three days and recommends an ideal time to wind down.

▲ Bedtime Guidance provides personalized recommendations based on the user’s sleep data from the past three days.

Vascular Load: Monitor Cardiovascular Health During Sleep

Vascular Load tracks stress on the vascular system while the user sleeps.

The feature incorporates related data — such as sleep duration, physical activity and stress levels — to offer a more holistic view of overall wellness.

▲ Vascular Load monitors for stress on the user’s vascular system during sleep.

Running Coach: Improve Performance With Real-Time Feedback

To help prevent injury while running, proper pacing and real-time, personalized feedback are essential. After a 12-minute run with the Galaxy Watch8 series, Running Coach analyzes performance data, categorizes running ability on a 10-level scale and generates a customized three- to five-week training program.

During runs, the feature provides personalized feedback guidance. Afterward, detailed workout summaries and motivational messages are shared.

▲ Running Coach creates personalized training programs based on the user’s running data.

Antioxidant Index: Track Carotenoid Levels in Seconds

Healthy aging starts from within. The Galaxy Watch8 series introduces the Antioxidant Index — a first-of-its kind smartwatch feature that measures carotenoid levels in the body.

By placing a thumb on the BioActive Sensor on the back of the watch for five seconds, users receive both a numerical score and a color-coded result representing their antioxidant status. The feature makes it easy to monitor aging-related health, offering intuitive insights into dietary and lifestyle habits. For example, a sky blue reading indicates a sufficient intake of carotenoid-rich foods like leafy greens and carrots.

▲ A user is measuring their Antioxidant Index.

Multimodal AI and One UI 8 Watch: Access Smarter Features

The Galaxy Watch8 series is the world’s first smartwatch to come equipped with Google’s Gemini. Even when hands are full, voice control allows users to operate key functions — offering intuitive support during workouts and daily routines.

For example, saying “start a 300-calorie circuit training workout” prompts Gemini to launch Samsung Health for seamless exercise tracking.

▲ Gemini enables hands-free control through voice commands.

Debuting with this release, One UI 8 Watch introduces a redesigned tiles optimized for smaller displays — making essential information easier to view at a glance.

▲ One UI 8 Watch features a redesigned tiles optimized for smaller displays.

Ultra-Slim Cushion Design: Experience All-Day Comfort

The Galaxy Watch8 series brings innovation to hardware as well. The Galaxy Watch8 features the thinnest design in the series to date, with an ultra-slim 8.6-millimeter profile.

▲ The Galaxy Watch8 has a sleek 8.6-millimeter profile.

The lightweight build reduces strain on the wrist, while a cushion design — first introduced on the Galaxy Watch Ultra — gives the Galaxy Watch8 series a refined, modern look.

The Galaxy Watch8 series includes two models — Galaxy Watch8, with a minimalist design optimized for daily health tracking, and Galaxy Watch8 Classic, combining a rotating bezel and quick button with the appeal of an analog watch. In addition, the Galaxy Watch Ultra will be available in a new Titanium Blue color.

From morning to night, the Galaxy Watch8 series supports full-spectrum health management — spanning exercise to diet and beyond. Powered by AI, the Galaxy Watch8 series marks the beginning of a more personalized wellness journey.

Samsung Electronics today introduced Galaxy Watch8 and Galaxy Watch8 Classic,¹ establishing an iconic design identity across the entire Galaxy Watch lineup. Building upon the foundation of the Galaxy Watch Ultra’s cushion design, this series boasts the thinnest, most comfortable Galaxy Watch ever² for continuous health tracking. The Galaxy Watch8 series suits diverse lifestyles and provides advanced capabilities, setting a new standard for style and personalized health experiences.

“We are committed to empowering billions of people to live healthier lives through our innovative technology,” said TM Roh, President and Acting Head of the Device eXperience (DX) Division at Samsung Electronics. “By combining purposeful design with advanced sensor technology and an intuitive AI-powered experience, the Galaxy Watch8 series serves as a starting point for a healthier, more connected life, making it easier than ever to take meaningful steps toward users’ well-being.”

Redesigned Inside and Out for Ultimate Wellness

By reimagining both form and function, the Galaxy Watch8 series delivers unmatched comfort alongside industry-leading performance, making it the ultimate companion for everyday wellness. The distinctive cushion design, which debuted with Galaxy Watch Ultra, now defines the entire Galaxy Watch lineup. To achieve the thinnest design yet, the internal structure of Galaxy Watch8 was completely reengineered and its component mounting capability has been improved by 30%, resulting in an 11% thinner design. Combined with the Dynamic Lug system, this design moves naturally with the wrist, providing greater comfort and improved stability² for a better fit and enhanced health-tracking accuracy.

Galaxy Watch8’s sleek profile is complemented by its exceptional performance. Even when you are outdoors under bright sunlight, the display is 50% brighter² with a peak brightness of 3,000nits for easy visibility, and the enhanced battery² ensures the watch can keep up with an active lifestyle. Moreover, the dual-frequency GPS provides more detailed and precise location results² while our most powerful 3nm processor delivers faster performance and greater power efficiency. With the groundbreaking BioActive Sensor that enables deeper and more accurate health insights, the Galaxy Watch8 series helps provide a holistic view of your health.

Motivation for Lasting Health Changes

Sleep is a window into your overall health and each restful night allows your body and mind to recover immediately the very next day. That’s why Samsung is continuously advancing the sleep experience, offering tailored sleep coaching, helping to create an optimal sleep environment, and even detecting moderate to severe signs of sleep apnea. On top of that, the Galaxy Watch8 series comes with new unique health features on the Samsung Health app³ that help you build healthier habits through instant, motivational insights – from sleep to nutrition and workout.

Bedtime Guidance⁴ can measure your circadian rhythm to suggest the optimal time to go to bed so you wake up refreshed the next morning. Vascular Load⁵ helps monitor the stress levels on your vascular system during sleep. Providing insights on various lifestyle factors including sleep, stress and activity, it helps you adopt a more comprehensive approach to managing your health.

Meanwhile, the Galaxy Watch8 series introduces Antioxidant Index⁶ for the first time in a smartwatch, enabling you to measure carotenoid levels in just five seconds and make informed lifestyle choices for healthy aging.

Whether you’re a novice or experienced runner, the Galaxy Watch8 series delivers personalized fitness insights to keep you motivated when you need it most. Running Coach⁷ calculates your fitness level from 1 to 10 and develops a tailored training plan complete with real-time guidance and motivational insights. With the updated Together feature, which now supports running, you can gamify your fitness journey by challenging friends and family.

If high level of stress persists, High Stress Alert will immediately signal so that you can take a break to help manage your stress levels in real-time. With Mindfulness Tracker, you can record your mood and receive guidance on breathing exercises to relieve your stress – all at once on your wrist.

Plus, the AI-powered Energy Score⁸ gives you a snapshot of your energy level, combining physical and mental energy metrics so you can have a healthier day, every day.

Easier Watch Interaction With Wear OS and Gemini

Developed in close collaboration with Google, the Galaxy Watch8 series is the first smartwatch to come out of the box with Gemini,⁹ Google’s AI assistant, and be powered by Wear OS 6. Go hands-free using natural voice commands to get things done on the go with your Galaxy Watch apps like Samsung Health, Calendar, Reminder and Clock. For example, you can ask Gemini to find a nearby cafe and text a friend to meet you there, all in one go. Or, if you’re ready to start your workout and you have a goal in mind, simply say, “Start a 30-minute run.” The watch seamlessly initiates the workout in Samsung Health.

In addition, thanks to the new One UI 8 Watch, the user interface is optimized for the size and shape of the watch face. The new Multi-Info Tiles provide easy access to health metrics, weather, events and more – all in a single, quick look. Moreover, the new Now Bar and depthless notifications ensure key activities are front and center.

Tailored To Match Every Lifestyle

Galaxy Watch8, Galaxy Watch8 Classic and the new Galaxy Watch Ultra are available for pre-order in select markets starting today, with general availability starting July 25.¹⁰

Featuring a sleek and minimalist design, Galaxy Watch8 is designed for everyday wellness. Available in 44mm or 40mm sizes and in Graphite or Silver, it provides comfort and style for daily activities. Meanwhile, Galaxy Watch8 Classic brings timeless sophistication to the wrist with modern features such as a rotating bezel and a quick button for added convenience. The Classic model measures 46mm and comes in Black and White. Plus, both models can be matched with a range of stylish bands¹¹ designed to suit diverse lifestyles.

For those who love outdoor adventures, Galaxy Watch Ultra is the most advanced and durable Galaxy Watch model yet. Available in four titanium finishes including the new Titanium Blue, it offers the longest battery life and the most robust performance in the lineup.

If you’re looking for a more discreet wearable that offers continuous health tracking, Galaxy Ring boasts superior comfort and up to seven days of battery life. Available in Titanium Black, Titanium Silver and Titanium Gold, the Galaxy Ring comes in sizes 5-15.¹¹

To learn more about Galaxy Watch8 and Galaxy Ring, please visit: www.samsungmobilepress.com, news.samsung.com/global, www.samsung.com/galaxy-watch or http://www.samsung.com/galaxy-ring.

Galaxy Watch8 Series Specifications

¹ Availability and  features may vary depending on market, model and the smartphone paired. 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.
² Compared to the previous Galaxy Watches.
³ Intended for general wellness and fitness purposes only. Not intended for use in detection, diagnosis, treatment, monitoring or management of any medical condition or disease. Any health-related information accessed through the device and/or application should not be treated as medical advice. Users should seek any medical advice from a physician. Certain features may vary by market, carrier, or the device paired.
⁴ Based on 3 days of sleep analysis of user’s circadian rhythm and sleep pressure.
⁵ Wearing a compatible Galaxy Watch is required when sleeping for at least 3 of the most recent 14 days.
⁶ To measure, the user should place the center of their finger on the sensor at the back of the Watch and hold it for 5 seconds. While Antioxidant Index can be measured using any finger, the thumb is recommended for the most accurate result. Repeat measurement due to uneven skin texture may lead to different results.
⁷ Prior to starting the coach program, taking a running level test and receiving a level designation is required.
⁸ Only available when user register a compatible Galaxy Watch or Galaxy Ring at least once.
⁹ Gemini mobile app available on select devices, languages, and countries. Requires compatible Wear OS watch to be connected to a compatible device. Check responses for accuracy. Internet connection and set up may be required. Features may differ depending on subscription and account. Results for illustrative purposes and may vary. Google and Gemini are trademarks of Google LLC.
¹⁰ Color and size availability may vary by market.
¹¹ Sold separately. Availability of watch bands may vary by market or carrier.
¹² Measured without health sensors.
¹³ Measured without band.
¹⁴ Battery life is based on results from internal lab tests for typical usage pattern scenarios conducted by Samsung. Actual battery life may vary depending on different usage patterns, device model, network environment and other factors. Typical value tested under third-party laboratory conditions. Typical value is the estimated average value considering the deviation in battery capacity among battery samples tested under the IEC 61960 standard.
¹⁵ Testing conducted by Samsung using pre-released version of Galaxy Watch8 and Galaxy Watch8 Classic (BT & LTE), each paired to a Samsung phone; all devices tested with prerelease software, Galaxy Watch Magnetic Fast Charging USB C Cable (EP-OL300), and Samsung 25W USB C Power Adapter (EP-TA800). Charge time varies according to region, settings, usage patterns and environmental factors; actual results may vary. Samsung 25W USB C Power Adapter (EP-TA800) sold separately.
¹⁶ Wear OS Powered by Samsung works with phones running Android 12 or later with more than 1.5GB of memory. Compatible devices may vary by market, carrier or device brand.
¹⁷ LTE connectivity only available in LTE models.
¹⁸ Galaxy Watch8 series has obtained MIL-STD 810H Certification: It has undergone a test that repeats from -20°C (1Hr) to 50°C (1Hr) for a total 6 hours.
¹⁹ Device activation is only available after connecting to a smartphone that supports Google Mobile Services. Compatible devices may vary by market, carrier or device brand.

What’s New:

New features¹ include Bedtime Guidance² to optimize sleep; Vascular Load³ to measure stress on the vascular system during sleep; Running Coach⁴ to support personalized training strategies; and Antioxidant Index⁵ to measure carotenoid levels for healthy aging. These features — part of One UI 8 Watch on the latest Galaxy Watch series — will be available to a limited number of users through a beta program.⁶

Why it Matters:

The goal of these new features is to help build healthier daily habits — which can be challenging as they don’t develop overnight. It takes time to form lasting behavior patterns, and meaningful change often becomes visible only after sustained effort. But the rewards are worth it.

For example, while eating unhealthy food may not have an immediate impact, it can lead to significant health consequences over time. Conversely, healthy habits may not produce instant results, but they often contribute to long-term physical and mental well-being.

“Sleep remains a cornerstone of our approach to health as it influences physical and mental well-being, social relationships and even work performance,” said Dr. Hon Pak, Senior Vice President and Head of Digital Health Team, Mobile eXperience (MX) Business at Samsung Electronics. “Now, we envision the Galaxy Watch delivering holistic insights centered around sleep — insights that lead to meaningful changes in daily life. We believe this aligns with our vision of empowering people to lead healthier lives through proactive care and holistic health management.”

New Features

Samsung Health’s new features are designed to help users build healthy habits by providing instant feedback as a motivating tool.

Bedtime Guidance

A single night of restful sleep offers immediate health benefits, encouraging proactive behavioral changes that contribute to a healthier tomorrow. This begins with setting and maintaining a consistent, optimal bedtime.

• Samsung continually advances its sleep-related features, including sleep pattern analysis, sleep coaching, tools for optimizing sleep environments and a feature that detects signs of sleep apnea⁷ — a common sleep disorder.
• Now, Samsung is introducing additional tools for better sleep, such as recommending an optimal bedtime based on individual lifestyle and sleep patterns along with reminders to help users stay consistent.
• By analyzing sleep data from the past three days, the feature evaluates both sleep pressure and circadian rhythm to suggest a bedtime that maximizes alertness the next day.
• This feature is especially helpful for those recovering from periods of irregular sleep. If users go to bed later than planned for several days or follow inconsistent schedules between weekdays and weekends, Bedtime Guidance will consider these factors to help ensure sufficient rest.

Vascular Load

Sleep is a window into overall health, influencing holistic well-being. The Galaxy Watch series leverages this opportunity to measure vascular load — the amount of stress on the vascular system during sleep.

• The vascular system carries blood throughout the body to deliver oxygen and nutrients while removing waste, making it a key indicator of heart health.
• During sleep, stress on the vascular system should naturally decrease. However, excessive fluctuations may negatively impact cardiovascular health.
• By wearing the Galaxy Watch during sleep, users can receive insights into vascular load and the stress placed on their vascular system.
• Because health factors are interconnected, Vascular Load also provides insight into lifestyle components such as sleep, exercise and stress — helping users maintain a healthier routine and build positive habits.

Running Coach

While sleep is a vital time to restore and support overall health, managing well-being during active moments is equally important. Running is one of the most accessible fitness activities, and Samsung has long supported runners by offering features that promote consistent training and help users reach their fitness goals.

• Many runners experience injuries due to over-pacing or undertraining. Running Coach is designed to help users train safely for marathons through optimized intensity and injury-preventive routines, making it ideal for beginners.
• The feature offers motivation and real-time guidance, creating a personalized training program based on the runner’s fitness level.
• By wearing the Galaxy Watch and running for 12 minutes, users receive a performance analysis and a running level score from 1 to 10. Based on this data, a detailed training plan is generated to support completion of a 5K, 10K, half marathon or full marathon. As users complete sessions, they level up and unlock their next running challenge.

Antioxidant Index

A holistic approach to health naturally includes a focus on aging and healthy aging. However, behavioral factors such as alcohol consumption, smoking, UV exposure, stress and lack of sleep can accelerate aging by increasing free radicals in the body that damage cells. Antioxidants, compounds found in many healthy foods, neutralize these free radicals to help prevent chronic illness and support healthy aging.

• The Galaxy Watch can measure carotenoids — antioxidants found in green and orange fruits and vegetables — that are stored in the skin.
• Antioxidant Index uses an industry-first feature to assess carotenoid levels in just five seconds via an advanced, light-activated BioActive Sensor.
• These insights can reflect behavioral changes. For example, drinking carrot juice may result in a measurable change in the index, offering motivation to adopt healthier habits.

Great health comes from the combination of many small changes — and with Galaxy Watch, it’s now more achievable than ever.

¹ Samsung Health features are intended for general wellness and fitness purposes only. The measurements are for personal reference only. Please consult a medical professional for advice. A Samsung account login is required. Vascular Load, Running Coach and Antioxidant Index are available on Android phones (Android 10 or above) and require the Samsung Health app (v6.30.2 or later). Vascular Load and Antioxidant Index are Labs features that can be previewed before official launch. These experimental features can be turned off in Samsung Health settings.
² Not intended for use in the detection, diagnosis or treatment of any medical condition or sleep disorder. Bedtime Guidance is available on Android phones (Android 11 and above) and requires the Samsung Health app (v6.30.2 or later). Based on three days of sleep analysis of the user’s sleep pressure and circadian rhythm.
³ Service only available with the Galaxy Watch Ultra or later released Galaxy Watch series. To use Vascular Load, users need to wear the Galaxy Watch while sleeping for at least three days out of the most recent 14 days.
⁴ Service only available with the Galaxy Watch7 series or later released Galaxy Watch series. To use Running Coach, users need to take a running level test and get a level before starting the program.
⁵ Service only available with the Galaxy Watch Ultra or later released Galaxy Watch series. To measure, place a finger on the sensor located on the back of the device and hold for five seconds. While Antioxidant Index can be measured using any finger, the thumb is recommended for the most accurate results. Repeated measurements due to uneven skin texture may lead to inaccurate results.
⁶ Users based in Korea and the United States with Galaxy Watch models (Galaxy Watch5 series or later released Galaxy Watch series) are eligible to join the beta program.
⁷ The Sleep Apnea feature is an over-the-counter (OTC), software-only mobile medical application operating on compatible Galaxy Watch series models and Galaxy smartphones. This feature is intended to detect signs of moderate to severe obstructive sleep apnea in the form of significant breathing disruptions in adult users age 22 and older over a two-night monitoring period. The feature is designed for on-demand use and not intended for individuals previously diagnosed with sleep apnea. Users should not rely on this feature as a substitute for professional diagnosis or treatment by a qualified healthcare provider. The data provided by this device is not intended to assist clinicians in diagnosing sleep disorders. Availability may vary by market, carrier, model or a paired smartphone.