Galaxy Watch3: Getting personalized fitness coaching | Samsung
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By Samsung Newsroom
The Galaxy Watch has a built-in accelerometer sensor that measures movement or acceleration forces in three dimensions (X,Y, and Z axes). This data is commonly used for tracking movement, detecting gestures, and enabling fitness-related features like sleep tracking, fall detection, step counting, running, and workout tracking.
The accelerometer measures acceleration along three axes:
X-axis: Side-to-side movement.
Y-axis: Forward-and-backward movement.
Z-axis: Up-and-down movement.
Figure 1: Axis directions for the accelerometer sensor
Acceleration is typically measured in meters per second squared (m/s²) or gravity units (g), where 1g = 9.81 m/s².
This article describes how to read accelerometer sensor data from a Galaxy Watch running Wear OS powered by Samsung and also shows the conversion procedure for the raw data.
Environment Setup
Android Studio IDE is used for developing Wear OS applications. The examples in this article use Java, but Kotlin can also be used. Going forward, this article assumes you have already installed the latest Android Studio version on your PC.
Read Accelerometer Data from Galaxy Watch
To get accelerometer data, we need to use Android Sensor APIs from the SensorManager library.
To retrieve accelerometer data from your Galaxy Watch:
Create a new Wear OS project in Android Studio by selecting File > New Project > Wear OS > Empty Activity > Finish. Set the minimum SDK version to API 30 or higher.
Add permission to access the sensor into the manifest file (AndroidManifest.xml):
<uses-feature android:name="android.hardware.sensor.accelerometer" /> You do not need to manually set the runtime permission to access the accelerometer. This permission is granted by default.
Design your preferred layout (.xml file) to show accelerometer data on the Galaxy Watch screen. This example uses three TextViews in a Constraint Layout to show the output of the three axes of the sensor. You can also check the result in the Logcat window in Android Studio. <TextView android:id="@+id/textViewX" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:text="X" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="0.207" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/textView2" /> For more detailed code, check the sample application.
Use the SensorManager library and SensorEventListener to read accelerometer data. To implement them: Initialize the SensorManager library globally: private SensorManager sensorManager; To retrieve android.hardware.SensorManager for accessing sensors, you have to use getSystemService(). sensorManager = SensorManager.getSystemService(Context.SENSOR_SERVICE); As our target is the accelerometer sensor specifically, it is set as the default sensor here. It is recommended to always check the sensor availability before using it in the code. The procedure to do so is explained in this guide.
To make the accelerometer the default sensor:
Sensor sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); To get continuous data from your Galaxy Watch, you need to register a listener to notify you if there is new data. This is done using a SensorEeventListener in Android’s Sensor API. sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_NORMAL); The listener method onSensorChanged() is called whenever new data is available. The new data is processed in the listener. private SensorEventListener listener = new SensorEventListener() { @Override public void onSensorChanged(SensorEvent sensorEvent) { // for absolute values X = Math.abs(sensorEvent.values[0]); //0 -> X Axis 1-> Y Axis 2 -> Z Axis Y = Math.abs(sensorEvent.values[1]); Z = Math.abs(sensorEvent.values[2]); Log.e("--MainActivityTag--", "X: " + X + "\n" + "Y: " + Y + "\n" + "Z: " + Z); // do whatever you want to do with the data } @Override public void onAccuracyChanged(Sensor sensor, int i) { } }; Here, onAccuracyChanged(Sensor sensor, int i) is a part of the SensorEventListener interface. It is triggered when the accuracy of a sensor changes. However, for the accelerometer, it is called rarely, as the accelerometer data accuracy usually remains constant.
Unregister the listener when the data collection is over. Otherwise, it can cause unusual battery consumption. Test the Code Sample
You can check out the sample app (download it using the link below) and try it out on your Galaxy Watch 4 and later.
AccelerometerDataExample.zip (332.2 KB)
Run the sample project on your Galaxy Watch. You will see the following screen.
Figure 2: Output of the sample project (accelerometer data on Galaxy Watch)
Accelerometer Data Units and Conversion for Galaxy Watch
In the application end, raw accelerometer data from Galaxy Watch is converted into meters per second squared (m/s²).
Equation
raw data * 9.80665 (gravity force) / 4096 (8g rescale)
Example
Assume,
raw_x = raw data received from the sensor
acc_x = accelerometer data in application end
if raw_x = 100
acc_x = 100 * 9.80665 / 4096
After this, acc_x is received by the application, containing the Acceleration value in m/s².
Convert the Data into G-Force Units
The conversion from m/s² to g is: 1 / 9.80665
So 1 m/s² =0.10197g
Information about the Accelerometer Sensor
The accelerometer provides the 3 axis values separately. The sampling rate of the accelerometer is usually a multiple of 50 Hz, but 100 Hz is also supported. The range of the accelerometer is +- 8G. Sampling rate:
#Maximum Delay: https://developer.android.com/reference/android/hardware/Sensor#getMaxDelay() // 160 msec
#Minimum Delay: https://developer.android.com/reference/android/hardware/Sensor#getMinDelay() // 10 msec It is always recommended to read calibrated data to avoid unnecessary noise. To get the result in g-force units, you need to divide the accelerometer values by 4096 (along every axis). It is recommended to use a filter while reading any sensor data. Make sure to always unregister the listener and stop all the services after using. Failure to do so can cause excessive battery drain. There are some restrictions of using background services for Galaxy Watch. Conclusion
For a Galaxy Watch running Wear OS powered by Samsung, accelerometer data is widely used in fitness tracking, fall detection, gesture recognition and motion analysis. Moreover, data conversion enables precise tracking for applications.
In this article, we’ve seen one of the ways of reading accelerometer sensor data on a Galaxy Watch running Wear OS powered by Samsung. You can also read sensor data using the Samsung Health Sensor SDK. For more details on Samsung Health, check here.
If you have any questions about or need help with the information in this article, you can reach out to us on the Samsung Developers Forum or contact us through Developer Support.
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By Samsung Newsroom
▲ Samsung Neo QLED 4K TV (QN85F)
Samsung Electronics today announced that its smart TVs and monitors will now support Netflix shows and movies in HDR10+.1 With HDR10+, viewers can enjoy richer contrast, deeper colors and stunning visual depth, making their favorite Netflix titles more immersive than ever.
“HDR10+ enhances the way we watch content, delivering deeper contrast and more vibrant colors for a truly cinematic experience,” said Taeyong Son, Executive Vice President of Visual Display Business at Samsung Electronics. “We are excited to bring this technology to Netflix’s 300 million plus members and will continue collaborating with various partners to expand HDR10+ support across our product lineup and the broader streaming ecosystem.”
HDR10+ is a next-generation high dynamic range (HDR) technology pioneered by Samsung, designed to optimize picture quality scene by scene. By dynamically adjusting brightness and contrast levels, HDR10+ ensures that each frame is displayed with exceptional clarity and detail, staying true to the creator’s intent.
With this integration, viewers can experience enhanced realism and depth across a growing library of HDR10+ content, making every scene feel more lifelike. HDR10+ content on Netflix will be accessible on 2025 Samsung Neo QLED, OLED and Lifestyle TVs — as well as 2025 and 2024 monitor models — with support for additional models in the future.
This launch marks a significant step in expanding HDR10+ content, bringing enhanced picture quality to more viewers. In addition to Netflix, Samsung is actively working with a growing network of industry partners to further extend HDR10+ support. For more information on Samsung TV, please visit www.samsung.com.
1 Samsung co-established HDR10+ Technologies LLC in 2018 to provide a royalty-free, open dynamic metadata standard in the industry.
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By Samsung Newsroom
March 2025 New Revenue Share Model for Galaxy Store
From May 15, 2025, Galaxy Store will introduce a new, developer-friendly revenue share model. Developers and publishers of paid games, applications, themes, and in-app items (both consumable and non-consumable) will earn 80% of the sales proceeds generated through the Galaxy Store, with Samsung retaining 20%. For subscriptions, the revenue share will be 85% for developers and 15% for Samsung. Get ready to boost your revenue potential with Galaxy Store!
Visit the Samsung Developer Portal for more details on these exciting changes. Samsung Health Data SDK 1.0.0.b2 Has Been Released!
The latest Samsung Health Data SDK release introduces new write capabilities for select Samsung Health data types. Previously, developers could only read or aggregate data using the SDK APIs. With this update, developers can now insert, edit, and delete data for specified data types*. We're excited to offer this opportunity to developers to access and utilize more Samsung Health data in their applications.
*Data types supported: Body composition, blood glucose, blood pressure, heart rate, nutrition, water intake
Learn More [MWC 2025] Explore AI-Powered Innovation in Mobile, Health, Home, and Networks with Samsung
Samsung Electronics stole the spotlight at Mobile World Congress (MWC) 2025, held in Barcelona and opening on March 3 (local time.) Samsung showcased new AI-powered mobile experiences and next-generation network solutions centered around the Galaxy S25 series. Visitors experienced Galaxy's vision for the future, through a dedicated Galaxy S25 zone featuring AI, camera, and gaming experiences, as well as AI-customized healthcare and smart home solutions. Samsung also shared advancements in security, sustainability, and network innovation technologies.
Discover more about the AI-driven mobile innovations and connected experiences unveiled at MWC 2025 at the Samsung Electronics Newsroom.
Learn More Samsung Announces Official Rollout of One UI 7 Starting from April 7
Samsung Electronics will begin rolling out the new One UI 7 starting on April 7 for key models including the Galaxy S24 series, Galaxy Z Fold6 and Galaxy Z Flip6, and will gradually expand to more Galaxy smartphones and tablets. This update enhances the user experience with a new UI design and powerful Galaxy AI features.
One UI 7 provides an intuitive UX and options for personalized settings. For added convenience, the Now Bar provides personalized, real-time updates directly on the lock screen. Additional AI features, including AI Select, Writing Assist, Audio Eraser, and Drawing Assist, have been added for a more intuitive experience.
Adjusting preferences is now easier. Users can simply navigate to Settings, tap the magnifying glass icon, and say, “My eyes are feeling tired.” Recommended options like adjusting brightness or enabling Eye Comfort Shield instantly appear. The update rollout begins in Korea and will gradually expand to global markets. Learn more in the Samsung Electronics Newsroom.
Learn More Samsung Electronics Unveils 6G White Paper and Outlines Direction for AI-Native and Sustainable Communication
Samsung Electronics has published its second white paper on technology trends for the 6G era, titled “AI-Native & Sustainable Communication.” This white paper outlines directions for enhancing network quality by applying AI technology throughout the telecommunication system, and for creating a sustainable user experience through energy efficiency improvements and extended service coverage. It also covers emerging 6G services, including immersive extended reality (XR), digital twins, and massive communication, as well as the key attributes that will enable them.
Samsung Electronics announced its continued commitment to leading global standardization and development efforts for the 6G era, while incorporating lessons learned from 5G commercialization and adapting to evolving market requirements. Learn more at the Samsung Electronics Newsroom.
Learn More Philips Hue Uses New Developer Tools for WWST Certification
SmartThings is excited to announce that Philips Hue has certified 155 lighting products as “Works with SmartThings!” As a leader in smart lighting, Philips Hue continues to expand consumer choices by introducing more connected lighting products, showcased directly in the SmartThings application and website. Leveraging tools like Certification by Similarity in the Developer Center, Philips Hue efficiently certified their entire product lineup.
Read more
Interested in certifying your products with SmartThings? Fill out this form to learn more and reach over 380 million users worldwide. Samsung Receives 58 Accolades at iF Design Awards 2025
Samsung Electronics is pleased to announce it has received a total of 58 awards at the International Forum (iF) Design Awards 2025, a prestigious German international design competition, including two Gold Awards.
"Ballie," an AI companion robot for the home, and "BOJAGI," an advanced concept package design for small portable projectors, were presented with Gold Awards. The 58 awards span various design and product categories, including the Bespoke AI Laundry Combo, Galaxy Ring, Neo QLED 8K, UX/UI, and service design.
Samsung Electronics announced its commitment to continuing to lead the customer experience with AI-driven innovation and sustainable design, striving to provide designs that harmonize with consumers’ evolving lifestyles and contribute to society and consumers lives.
Learn More FaceMe: Robust Face Restoration with Personal Identification
FaceMe from Samsung Research is a technology that restores high-quality facial images from low-quality sources while preserving identity consistency. It utilizes the CLIP image encoder and the ArcFace facial recognition module to extract identity features from a reference image, and uses them as a prompt for the diffusion model to enhance the restoration’s performance. The training is conducted in phases using ControlNet and ID encoder modules, and wavelet-based color correction is applied for a final, natural-looking restoration. FaceMe does not require additional training for personalized restoration. Using a variety of reference images, this is a new approach that overcomes limitations of existing face restoration technologies. Find out more about FaceMe and its proven identity consistency, restoration quality, and high speed in the Samsung Research blog.
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By Samsung Newsroom
▲ Zhu Jinshi’s This Triptych is as Gorgeous as the Autumn in a Scented Room (2023) shown on Neo QLED 8K by Samsung.
Samsung Electronics, the Official Art TV of Art Basel, today announced that it is bringing contemporary masterpieces from galleries exhibiting at Art Basel Hong Kong 2025 to a global audience. Starting today, subscribers of the Samsung Art Store, a premium digital art platform exclusively available on Samsung TVs, will have access to a curated collection of 23 select works from Art Basel’s galleries, some of which will be displayed at the highly anticipated fair, taking place from March 28-30,1 2025 at the Hong Kong Convention & Exhibition Centre.
The Samsung Art Store is home to 3,000+ works from world-renowned museums, galleries and artists. Subscribers can explore expertly curated masterpieces in stunning 4K resolution to bring the program of Art Basel galleries into their homes. The Art Basel Hong Kong collection includes renowned artworks such as Zhu Jinshi’s “This Triptych is as Gorgeous as the Autumn in a Scented Room,” Ticko Liu’s “Enduring as the Universe,” Jimok Choi’s “Shadow of the Sun,” Bae Yoon Hwan’s “Green Bear,” and more.
“Samsung Art Store is making fine art more accessible than ever, bringing the premier artworks presented by leading international galleries at Art Basel Hong Kong directly into people’s homes,” said Bongjun Ko, Vice President of Samsung Electronics’ Visual Display Business. “We are proud to expand this experience to more Samsung TV owners worldwide, allowing them to enjoy world-class artwork in stunning 4K quality with just a few clicks.”
Bringing the Art Basel Experience to Samsung TVs
▲ Ticko Liu’s Enduring as the Universe (2024) shown on Neo QLED 8K by Samsung.
Art Basel stages the world’s premier art shows for modern and contemporary art, sited in Hong Kong, Basel, Paris and Miami Beach. Through the Samsung Art Store, a curated selection of these masterpieces is now available beyond the exhibition halls, allowing art lovers worldwide to experience select artworks presented by leading international galleries at Art Basel – all from the comfort of their homes.
To further highlight the intersection of art and technology, Samsung will present an interactive lounge, titled ArtCube,2 at Art Basel Hong Kong on March 28-30. The showcase will demonstrate how The Frame, MICRO LED and Neo QLED 8K redefine digital art experiences by displaying artwork, including those from the Art Basel collection in breathtaking detail. Under the theme “Borderless, Dive into the Art,” ArtCube visitors will engage with Samsung Art Store’s exclusive collections, bridging the gap between physical and digital art.
In addition to its ArtCube Lounge experience, Samsung presents a series of panel discussions highlighting influential voices from the contemporary art scene. Daria Greene, Head of Content and Curation at Samsung leads each engaging one-on-one dialogue. The conversations feature Hayley Romer, Chief Growth Officer of Art Basel, and Marc Dennis, an American artist known for his hyper-realistic paintings.
Expanding Samsung’s Digital Art Leadership
While previously exclusive to The Frame and MICRO LED, the Samsung Art Store will soon be available on 2025 Samsung AI-powered Neo QLED and QLED TVs,3 as part of Samsung’s mission to bring world-class art to an even bigger audience. In addition to the Art Basel Hong Kong collection, Samsung will continue its partnership with one of the world’s most prestigious art fairs by introducing exclusive artworks from Art Basel’s Basel and Paris collections later this year.
“We are proud to partner with Samsung Art Store on the 2025 Art Basel Hong Kong collection – extending Art Basel Hong Kong’s best-in-class cultural experience beyond the halls of the show, and creating new, year-round opportunities for ever broader audiences to engage with Art Basel’s distinguished international program of galleries and their artists,” said Noah Horowitz, CEO of Art Basel.
The Art Basel Hong Kong collection features works from 23 globally acclaimed artists, including Jimok Choi, Bae Yoon Hwan, Stephen Wong Chun Hei, Ticko Liu, Alasie Inoue, Tromarama, Damian Elwes, Zhu Jinshi, Nakai Katsumi, Cao Yu, Hamra Abbas, Nabil Nahas, Owen Fu, Sophie von Hellermann, Chow Chun Fai, Gillian Ayres and Gongkan.
For more information, visit www.samsung.com.
About Art Basel
Founded in 1970 by gallerists from Basel, Art Basel today stages the world’s premier art shows for Modern and contemporary art, sited in Basel, Miami Beach, Hong Kong, and Paris. Defined by its host city and region, each show is unique, which is reflected in its participating galleries, artworks presented, and the content of parallel programming produced in collaboration with local institutions for each edition. Art Basel’s engagement has expanded beyond art fairs through new digital platforms including the Art Basel App and initiatives such as the Art Basel and UBS Global Art Market Report and the Art Basel Awards. Art Basel’s Global Lead Partner is UBS. For further information, please visit artbasel.com.
1 Event is open to the public from March 28-30, after VIP opening from March 26-27.
2 Samsung Lounge ‘ArtCube’ will be located in L3, the main exhibition floor inside the Hong Kong Convention and Exhibition Center.
3 For models Q7F and above.
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By Samsung Newsroom
Today, Samsung is announcing a new revenue share model for Galaxy Store, increasing the current revenue share of 70/30 to 80/20 for developers and publishers.
Starting May 15, 2025 (GMT+0), developers and publishers of paid games, apps, and consumable and non-consumable in-app items using Samsung Checkout will start receiving 80% of the net sales proceeds* generated and received through Galaxy Store, while Samsung will retain 20%. For subscription services, the revenue share model will be 85% / 15%.
For all developers and publishers who are currently publishing an app on Galaxy Store and obtained certification via the Galaxy Store Seller Portal, no action is required to start benefiting from this higher revenue share. Unless you have a custom agreement, Samsung will automatically apply the new revenue share terms on May 15, 2025 (GMT+0). If you have a custom agreement with Samsung, you will not be impacted by this change and the terms of the custom agreement will continue to apply.
FAQ
Q: When will I start receiving the new increased revenue?
A: The new revenue share model will start on May 15, 2025 (GMT+0).
Q: Will purchases made today in Galaxy Store be affected?
A: Purchases made in Galaxy Store before May 15, 2025 (GMT+0), will continue at the current 70/30 revenue share model.
Q: Will there be any other changes in the calculation of the revenue share?
A: No. Before distributing your revenue share, Samsung will deduct the same customary fees from the total revenue such as sales tax, bank fees and other cost as provided in the Galaxy Store Seller Portal Terms and Conditions.
Q: I have a custom agreement with Samsung. Will this change affect the agreement?
A: No, if you have a custom agreement you will not be impacted. If you are interested in moving to the new revenue share model, please contact your Samsung account manager.
Q: What apps will benefit from the new revenue share model?
A: All paid apps, including games and themes, as well as consumable and non-consumable in-app items will benefit from the new 80/20 revenue share model.
Developers of subscription services (where recurring payment is made by users) will receive a higher revenue share based on an 85/15 revenue share model.
Q: What do I need to do to receive my increased revenue share?
A: If you have accepted Samsung Galaxy Store Seller Portal Terms and Conditions, then no action is necessary. Samsung will automatically update your revenue share to the new terms on May 15, 2025 (GMT+0). If you have a custom agreement, you will not be impacted by this change. If you are interested in moving to the new revenue share model, please contact your Samsung account manager.
For further inquiries, please reach out to [email protected].
*Subject to the deduction of customary sales tax and other fees.
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