Compare Apple Watch Ultra 4 vs Samsung Galaxy Watch Ultra 2

GPS performance is usually excellent, with multiband tracking producing clean routes and small advantages over standard Apple Watch models. One scientific test found a major route anomaly, so the record is strong rather than flawless.

Dual-band GPS is usually fast to lock and highly accurate, often matching Garmin or other reference devices closely on distance and route shape. Some tests still found corner cutting or small deviations, so it is excellent rather than perfect.

Heart-rate tracking is usually excellent and often aligns closely with chest straps, but several tests found delayed locks, skipped samples, or weaker performance during fast-changing efforts. It is top-tier rather than uniformly perfect.

Heart-rate tracking is often very strong during running and cardio, with several tests showing close agreement with Polar straps, Apple Watch and other references. Harder conditions such as strength work, swimming or cadence-heavy movement can still produce errors.

Sleep tracking is consistently regarded as strong and often highly accurate for bed and wake times, though the large case can make overnight wear less comfortable.

Sleep tracking is one of the most inconsistent areas: some testers found stages and duration closely matched other wearables, while others saw missed periods or implausible scores. The comfort improvements make overnight wear easier, but the data itself is not uniformly dependable.

Overall sports tracking performed very well in race testing, with strong GPS and generally dependable workout data.

General exercise tracking is strong, with several controlled tests showing close agreement on distance, steps and body metrics. Accuracy is not flawless across every sport or metric, but the overall fitness-tracking performance is competitive.

The Workout app covers a very broad range of sports and supports detailed custom intervals, though it is less granular than dedicated endurance platforms for sub-disciplines.

The Ultra 2 offers a very broad workout library plus new trail-running and diving tools, making it versatile for general fitness and outdoor use. Serious athletes still note missing modes and deeper sport-specific features, so breadth does not always equal depth.

Workout Buddy can be genuinely useful, especially now cellular models can use it without carrying an iPhone, but its commentary can also hallucinate or phrase guidance oddly.

Samsung’s running, fitness and health coaching can turn scores into personalized goals and suggested workouts, and several users found it genuinely helpful. Pacing errors, calibration requirements and some iFIT-linked workouts keep the experience from feeling universally polished.

Readiness is one of the most welcomed additions because it turns sleep, vitals, and training data into simple, dynamic guidance. Early bugs, delayed updates, and limited historical context keep it from matching the deepest recovery systems yet.

Energy Score, Cardio Load and related recovery tools can help decide whether to push harder or back off, and several users found the guidance useful. Some advice can feel generic, stale or less sophisticated than Garmin, Oura or Google alternatives.

Step tracking is generally strong and can avoid obvious false counts, with manual testing showing very good true-positive detection. Some testers remain unsure how much the new pedometer improves real-world totals.

Step accuracy is sharply mixed. Manual walking tests can be nearly exact, but multiple sources reported phantom steps while driving and one test produced a dramatically inflated count.

The new sensing system is broadly regarded as a meaningful health upgrade, delivering denser measurements and more useful longitudinal data. Accuracy is generally praised, though not every metric has independent validation yet.

Health measurements are broadly credible, with some metrics aligning closely with scales or other wearables. There are also reports of missed readings, questionable outliers and body-composition bias, so not every metric deserves equal confidence.

More frequent heart and HRV data, improved Health views, and recovery metrics make day-to-day wellness trends more actionable and easier to understand.

Samsung’s Vitals, Heart Health Score, Cardio Load and other wellness tools are widely praised for turning raw sensor data into understandable trends and prompts. Some features need a week or more of baseline data, but the overall health context is a major strength.

Battery life is the clearest upgrade, commonly lasting around two to three days and substantially outlasting earlier Ultras in testing. It still trails dedicated endurance watches by a wide margin, and one test saw unexpectedly poor drain.

Battery life is one of the Ultra 2’s biggest upgrades, commonly landing around two to three days and sometimes longer depending on settings and GPS use. Heavy navigation and workouts cut that endurance, but most users no longer need to plan around daily charging.

Fast top-ups fit naturally into showers, breakfast, or desk time, making it easy to keep the watch ready for overnight wear. The main drawback is needing to remember those frequent top-ups.

Charging convenience is a recurring weakness because the Ultra 2 relies on Samsung-compatible magnetic charging and often refuses standard Qi or third-party multi-device stands. That makes travel and bedside setups less flexible than the watch’s premium price suggests.

Fast charging is a standout strength: short sessions of roughly 5–15 minutes can add enough power for sleep tracking or much of a day.

Charging speed is inconsistent across testing: some units reach useful top-ups or a full charge in roughly 90 minutes, while others take closer to two hours or initially far longer. Even positive testers often wish the large battery refilled faster.

Comfort depends heavily on wrist size and preference. Some enjoy the Ultra's heft, but several small-wristed users find the 49mm body bulky, especially for sleep.

The thinner case and softer bands make the Ultra 2 dramatically easier to wear than the first model, and many testers could comfortably keep it on overnight. Its 47mm body is still large and can feel cumbersome on smaller wrists or for sensitive sleepers.

The titanium construction feels premium and exceptionally well made.

Titanium and sapphire give the Ultra 2 a distinctly premium, durable feel. The materials are tough and corrosion-resistant, though the titanium case can still pick up cosmetic marks over time.

The rugged Ultra aesthetic still has fans, especially in natural titanium, but the unchanged shape is also a common complaint and can make the new model look indistinguishable from its predecessors.

The squircle-and-circle design is polarizing in theory but wins over many users in practice, especially with the slimmer profile, engraved bezel and premium finishes. A few details, such as the orange center button or sheer size, still divide opinion.

Band impressions are mixed: new designs and convenient adjustment features earn praise, while Apple's expensive first-party bands are criticized as poorer value and quality than some third-party choices.

Samsung’s redesigned bands are generally softer, lighter, more flexible and more breathable than the first Ultra’s straps, making long wear and sleep easier. The proprietary attachment and high accessory pricing remain notable drawbacks, and one Marine Band was still found rough.

The large Ultra case can fit comfortably for some people, but thin or average wrists may need a tight strap for reliable heart-rate readings and can find the size excessive.

The slimmer body, flatter stance and secure band system improve how the Ultra 2 sits on the wrist. Fit is still highly wrist-dependent because the single 47mm case can overwhelm smaller wrists despite the comfort gains.

The single 49mm size remains a recurring complaint, particularly for smaller wrists that would benefit from a second, more compact Ultra option.

The single 47mm case is a repeated complaint. Even with the thinner design, buyers with smaller wrists have no compact Ultra option and may be better served by the standard Galaxy Watch line.

The Ultra's water capability is more than sufficient for common snorkeling and recreational water use, while deeper diving remains a specialized use case.

Water durability is exceptional, with 10ATM, IP69K and EN13319 diving certification giving the Ultra 2 much stronger aquatic credentials than a normal smartwatch. Several testers view it as legitimately dive-ready rather than merely swim-safe.

Ruggedness remains a major strength, with the titanium Ultra repeatedly described as exceptionally durable and well suited to outdoor use.

Titanium, sapphire crystal, IP69K protection, 10ATM water resistance and military-grade testing make the Ultra 2 exceptionally rugged. It handles daily knocks confidently, although exposed case edges can still collect cosmetic scratches.

The titanium case feels exceptionally well made and suitably substantial for an Ultra-class watch.

The titanium construction feels solid, premium and cohesive, with a case that looks and feels appropriate for a flagship outdoor watch. The hardware is repeatedly described as exceptionally well put together.

The display remains one of the watch's strongest pieces: bright, vibrant, readable at angles, and excellent in always-on use even though the panel itself is largely unchanged.

The Super AMOLED display is a standout strength, repeatedly praised for sharp text, vibrant color, excellent contrast and generous screen space. Several testers called it among the best smartwatch displays they have used.

The 3,000-nit display is extremely bright outdoors and remains easy to see in demanding lighting.

The 5,000-nit panel is consistently praised as exceptionally bright, even if some consider that level more than most situations require. Its extra headroom becomes genuinely useful in harsh sun and for the screen-based flashlight.

Outdoor visibility is excellent; even reviewers in very bright sun found the screen more than bright enough.

Outdoor readability is close to unanimous praise. The 5,000-nit display remains clear in direct sun, on trails and even around water, making workout data and navigation easy to glance at without shading the screen.

General day-to-day use can feel dependable, but early Readiness/Vitals crashes and display bugs show that the new software still needs polish.

A small but important set of tests found intermittent gaps in heart-rate or sleep data even when the watch was worn consistently. Those misses make sensor reliability a concern for buyers who depend on uninterrupted health records.

Value depends strongly on the buyer. New or older-Ultra owners focused on health and battery see a compelling upgrade, while Ultra 3 owners and budget-conscious shoppers often get most of the experience for less elsewhere.

The $699 price produces the most divided opinions. The battery, display, durability and outdoor features can justify the premium for active users, but the Galaxy Watch 9 and discounted older Ultras deliver much of the everyday experience for less.

A built-in LED flashlight is still missing, and at least one tester specifically called it out as a desired addition.

The screen-based flashlight benefits directly from the very bright display and is surprisingly useful for dark rooms, nighttime checks and quick tasks. It cannot match a dedicated hardware flashlight, but it is far from a throwaway feature.

Cellular support meaningfully improves phone-free workouts, including letting Workout Buddy operate without an iPhone nearby.

Built-in LTE can make the Ultra 2 genuinely independent for calls, messages and workouts without a phone, and cellular battery use has improved. The forced LTE configuration, lack of 5G, extra plan cost and battery drain make it unnecessary overhead for some buyers.

The watch remains tightly locked to iPhone, with no Android pairing and additional feature limits on older iPhones.

Compatibility is one of the Ultra 2’s clearest limitations: it is Android-only, and ECG, blood pressure, sleep-apnea features and some integrations can require a Galaxy phone. Other Android phones still get much of the experience, but not the complete feature set.

Privacy is the most divisive new area. Apple's on-device protections earn praise, but Siri Recap and other always-listening features raise repeated concerns about bystander consent and ambient recording.

Samsung Health earns credit for allowing users to download their collected data, which supports data ownership. At the same time, AI-training settings may warrant an opt-out for users who are uncomfortable with that use of their data.

Emergency SOS, satellite communication, and the siren add meaningful reassurance for remote or risky activities, even if most buyers will rarely need them.

Emergency SOS, fall detection and the loud siren are repeatedly viewed as reassuring additions for outdoor use. They are features most owners hope never to need, but they strengthen the Ultra 2’s adventure credentials.

Standard Bluetooth use is present, but the inability to natively broadcast heart-rate data to common fitness equipment is a notable limitation for some athletes.

Bluetooth support is useful for phone-free audio and, notably, direct cycling power-meter connections. The connection options broaden the watch’s usefulness without requiring a phone for every activity.

Touch controls work well in ordinary conditions but become awkward with wet hands or gloves, where swipes needed for workout controls can fail.

Touch input is generally fast and responsive, including the improved touch bezel. Wet or sweaty workout conditions still make physical controls preferable, but the touchscreen itself earns strong marks.

Native mapping and routing remain one of the Ultra's weakest sports areas. Serious route navigation often requires third-party apps such as WorkOutDoors or similar tools.

GPX routes, turn-by-turn guidance, off-route warnings and Google Maps make navigation genuinely useful for hikes and runs. Route loading, missing map labels, limited rerouting and the lack of a full always-available offline map system keep it behind dedicated outdoor watches.

The broad third-party app ecosystem can fill gaps in analysis and mapping, but some new power-saving workout features remain locked to Apple's native Workout app.

Third-party app support is excellent for a smartwatch, with useful Wear OS options such as Spotify, Strava and WhatsApp working directly on the watch. This breadth is a major advantage over more closed fitness-watch platforms.

Conversation-recall tools have intriguing potential for remembering details, but much of that utility was still untested at launch and depends on future Siri integration.

Voice notes become much more useful when recordings sync to a Galaxy phone for AI summaries and generated notes. The integration turns a basic recorder into a practical capture tool.

Wayfinder remains excellent and Siri Modular has fans, but the limited number of genuinely new faces leaves some owners wanting more visual freshness.

Samsung and the Play Store offer a large, attractive selection of watch faces with useful complications and strong customization. The bright, large display gives those faces plenty of room to work.

Workout fields and watch complications offer a useful degree of customization, though serious endurance users still get less flexibility than on some dedicated sports watches.

Watch faces, tiles, complications, gestures, shortcuts and swappable bands give the Ultra 2 extensive room for personalization. Proprietary band hardware is the main constraint in an otherwise flexible setup.

The Action button is repeatedly useful for starting workouts, precision starts, and sweaty-finger control, while the guarded layout helps prevent accidental presses.

The Quick Button and side keys are generally tactile, responsive and useful for fast workout or shortcut access. Opinions are less positive about the missing rotating bezel, occasional button crowding and controls that can be awkward during sweaty workouts.

The redesigned Health experience is widely praised as clearer and much more useful, although the Fitness app still feels thin for deep sports analysis without third-party tools.

Samsung Health is generally praised for clearer organization, useful health cards and an approachable amount of detail. It can still feel fragmented across multiple Samsung apps, and occasional lag, freezes or awkward organization appear in heavier use.

The Ultra's three-microphone arrangement improves wind handling and voice isolation, giving it an advantage for wrist calls in rough conditions.

Calls are a strong everyday feature: audio is loud enough to hear, the speaker is clear, and callers reported good microphone quality. The watch works well for quick phone-free conversations.

Performance is consistently fast and smooth, with the S11/watchOS 27 combination reducing lag and making Siri and everyday interactions feel quicker.

The Snapdragon Wear Elite platform makes the interface, apps and animations fast and fluid in most testing, a clear improvement over older Galaxy watches. A few users still noticed stutters or heavier-app hiccups, so it is not perfectly consistent.

Readiness is presented in a simple, approachable way, but some routine information such as sleep stats can still require more menu diving than competing watches.

One UI Watch is usually intuitive, customizable and easy to learn, especially for existing Samsung users. Feature density and a few interaction choices can make some menus busier or more awkward than necessary.

watchOS 27 feels noticeably faster on the Ultra 4, especially for common actions such as timers, smart-home controls, and app launching.

Wear OS 7 with One UI Watch 9 is powerful, polished and tightly integrated with Android, with a strong app library and long software-support promise. The overall OS experience is one of the watch’s strongest everyday advantages.

Siri is faster and more capable on the new hardware, but experiences range from excellent to still frustratingly limited for harder queries or smart-home control.

Gemini is one of the Ultra 2’s most consistently praised smart features, especially for Raise to Talk, timers, questions and app actions without touching the screen. A few tests found the raise gesture inconsistent, but most found it fast and genuinely useful.

Beyond fitness, the Ultra remains an excellent general smartwatch with strong Apple integration and useful additions such as faster Shazam and new audio tools.

As an everyday smartwatch, the Ultra 2 is exceptionally capable, covering calls, messages, payments, apps, music, LTE, AI and health tools without constant phone use. Even critical sports-focused testers generally agree that its core smartwatch experience is excellent.

The jump to 128GB makes local storage unusually generous for a wearable, giving more room for apps, playlists, and offline content.

The 64GB storage provides ample room for offline playlists, podcasts, maps and apps. It meaningfully improves phone-free runs because music can stay on the watch and play directly to Bluetooth earbuds.

For Apple users, the watch pulls fitness, wellness, apps, and phone integration into one cohesive ecosystem that can replace several separate wearables or services.

Wear OS gives the Ultra 2 an unusually strong smartwatch app library, with Google Maps, Spotify, WhatsApp, Gmail, YouTube Music and other familiar tools working directly on the wrist. App availability is one of its clearest advantages over many dedicated sports watches.

Automatic workout recognition is usually quick and dependable, with several testers praising reliable starts and responsive pausing. A few sessions were split after longer stops, so manual starts are still safer when one continuous track matters.

The Antioxidant Index attracts curiosity but little enthusiasm. It is repeatedly described as hard to act on or more of a gimmick than a genuinely useful health metric.

ECG readings generally worked as expected and one comparison produced results similar to a dedicated Kardia device. It remains a wellness feature rather than a substitute for clinical diagnostic equipment.

Several headline outdoor features arrived incomplete or unavailable, including parts of the diving experience and built-in trail discovery. Buyers interested in those specific capabilities should not assume every announced function is ready on day one.

Automatic pause and resume behavior works especially well during stops such as traffic lights, restarting quickly when movement resumes. This makes everyday activity tracking feel more hands-off and precise.

Haptics are a standout detail, with strong, precise feedback that can reliably signal calls and messages without sound. Several testers rank the vibration quality among the best they have used on a smartwatch.

Blood-oxygen tracking is described as working normally alongside the watch’s other core health sensors. There is little standalone testing of SpO2 accuracy, so confidence is more limited than for heart rate or GPS.

Blood-pressure readings are a welcome addition and can be useful once configured, but setup requires cuff calibration and some phone restrictions still apply. Experiences range from readings that work fine to frustration with the setup burden.

Skin-temperature trends can feed Vitals and flag unusual overnight changes, giving the metric a practical role beyond simply showing a number. The usefulness comes mainly from baseline alerts rather than isolated temperature readings.

Daily calorie-burn estimates were considered surprisingly believable and close enough to other calculations to be useful. This is limited to one detailed assessment, but it was strongly positive.

Climb and descent guidance is useful for trail runners and cyclists because it surfaces gradient, elevation and upcoming hill information. The concept is strong, but separate elevation-accuracy concerns mean serious athletes may still want a dedicated sports watch.

Fitness Index, Heart Health Score and related scores make large amounts of health data easier to digest and give users concrete targets. The best implementations point toward what to improve rather than simply reporting past activity.

Stress tracking is reported to work normally alongside Samsung’s other core health measurements. There is little dedicated testing of the stress metric itself, so the positive signal is limited.

Google Wallet and Samsung’s payment support make quick purchases from the wrist easy and genuinely phone-free. Testers who used it viewed payments as one of the practical everyday smartwatch benefits.

Navigation is mixed: the digital bezel can feel intuitive and responsive, but several users still miss a physical rotating bezel for precision, gloves or wet hands. Touch-based scrolling can also obscure content or overshoot.

Music control works well from the wrist, including full YouTube Music browsing and playback management. It is a useful part of the watch’s ability to replace short phone interactions.

Initial Samsung-phone setup can be clean and automatic, but connectivity is not flawless. One real-world run lost the phone connection and interrupted media playback, leaving this a limited and mixed area.

Notification delivery has improved substantially and can be seamless once configured, with direct replies working well. Default app permissions and Samsung’s notification settings can still require manual cleanup and occasionally cause missed alerts.

Wi-Fi is useful as a fallback when the phone is absent, allowing messaging and other connected functions without LTE. There is little direct testing of Wi-Fi performance beyond that use case.

Native external-sensor support is a major sports limitation. Several testers strongly criticized the lack of straightforward chest-strap and broader sensor pairing inside Samsung’s workout environment, forcing workarounds or third-party apps.

Native running-power support is still missing, which is a notable omission for performance-focused runners. Dedicated sports watches remain better equipped for this metric.