During workouts, users can take advantage of hydration guidance, newly added to Nutrition Alert. Based on estimating sweat loss relative to body weight, it provides guidance on recommended fluid intake to help users stay hydrated during extended exercise sessions.
▲ Hydration guidance
Galaxy Watch9: A Companion for Everyday Health
Galaxy Watch9 is designed to be an everyday companion for continuous health management. Its slimmer body and Sport band with a new air pocket structure fit comfortably and securely around the wrist, making it ideal for all-day wear — from workouts to sleep.
Powered by the Snapdragon Wear Elite platform, Galaxy Watch9 features a 390mAh battery7 with 20% more capacity than the previous generation to support fast performance and consistent health monitoring throughout the day.
▲ (From left) Galaxy Watch9 comes in 40- and 44-millimeter sizes.
The Galaxy Watch series’ digital health experience is centered around the updated Samsung Health, an all-in-one health coach that brings together five core pillars — Activity, Mindfulness, Nutrition, Sleep and Vitals — in one place. By capturing signals from the body and presenting them at a glance, the app helps users stay ahead of their health.
Sleep is the foundation of health management. The upgraded Sleep Apnea feature8 analyzes the number of breathing disruptions per hour using an AI algorithm and categorizes them into three levels. It further refines the sleep apnea detection capability that earned Samsung the world’s first De Novo authorization from the U.S. Food and Drug Administration (FDA) in 2024.
▲ Sleep insights
Key health metrics measured during sleep can be viewed at a glance in Vitals.9 Using heart rate, heart rate variability, respiratory rate, skin temperature, and blood oxygen saturation, Galaxy Watch9 establishes a personalized baseline to help identify meaningful changes in health.
Heart Health Score10 provides an easy-to-understand snapshot of cardiovascular health by combining factors such as activity level, sleep, body composition, and stress trends into a single score representing the user’s current condition.
Workout plans can also be tailored to fitness levels. Fitness Index11 uses body composition and workout history to assess whether a user’s current exercise volume is appropriate, helping set individualized goals. On days with more intensive workouts, Daily Cardio Load12 helps users assess training balance and determine how much recovery time they need.
▲ Heart Health Score
Galaxy Watch Ultra2 excels in high-intensity training, while Galaxy Watch9 supports everyday health management. Together with enhanced hardware and Samsung Health, the next-generation Galaxy Watch series delivers a smarter, more personalized health experience.
1 Based on market research of globally released smartwatches as of June 2026. The 5,000-nit specification refers to the localized peak brightness achieved under high ambient light, and full-screen brightness may differ. Actual brightness may vary or be limited depending on environmental factors, device temperature and usage conditions.
2 Select one Marine, Peakform, or Trail band at checkout. Additional bands sold separately.
3 Requires a compatible Android smartphone. Must select map from Samsung Health App or upload compatible GPX file.
4 Consistent with 10ATM water-resistance classification, up to 100m of water for up to 10 minutes. Tested in 5% salty water and 4ppm chlorine water. Rinse residue/dry after wet. Water resistance is not a permanent condition and can diminish over time.
5 Consistent with IP69K rating: highest dust resistance available on IP scale; water-resistance for protection against ingress under high pressure washdown and jets (1,160 to 1,450 PSI). Rinse residue/dry after wet. Water-Resistance is not a permanent condition and can diminish over time.
6 The Mares app is a third-party app, expected to launch in the second half of 2026. Requires download.
7 Galaxy Watch9 40mm.
8 The Samsung Sleep Apnea Feature is listed by Samsung Electronics Co., Ltd. Mobile Experience Business with the U.S. Food and Drug Administration as an over the-counter device to assess risk of sleep apnea. This device is intended to provide a notification of the risk of sleep apnea in users who have not been previously diagnosed with sleep apnea. It uses software algorithms to analyze input sensor signals and provide a risk assessment for sleep apnea. It is not intended to provide a stand-alone diagnosis, replace traditional methods of diagnosis (e.g., polysomnography), assist clinicians in diagnosing sleep disorders, or be used as an apnea monitor. Consult your physician if you have any questions regarding sleep apnea. Availability may vary by market, carrier, model or a paired smartphone.
9 Requires a compatible Samsung Galaxy phone, Samsung Health app and Samsung account. Requires initial setup wearing watch for 7 out of 28 nights. The Vitals software functions are not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease.
10 Requires a compatible Samsung Galaxy phone, Samsung Health app and Samsung account. Requires initial setup wearing watch for 24 hours (including awake and asleep). The Heart Health Score software functions are not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease.
11 Requires initial setup with compatible Android phone, Samsung account and Samsung Health app. Premium content (optional) powered by iFit requires paid subscription.
12 Daily cardio load is available on Android phones (Android 10 or above) and requires the Samsung Health app (v7.0 or above). Samsung account login required. Service only available with Galaxy Watch7 or above with One UI 9 Watch or above. To use this feature, at least 7 days of activity records are required, while 28 days of continuous wear is recommended for optimal accuracy. Please note that values may increase in daily situations where heart rate rises, such as during tension, anxiety, or stress.