Compare Apple Watch Series 11 vs Samsung Galaxy Watch Ultra (2025)

Auto-detection works very well for walking and running, but one reviewer found it less reliable for cycling and strength training.

The antioxidant index is consistently weak, with several reviewers calling it low-value, inaccurate, gimmicky, or only marginally responsive.

The app ecosystem remains a major advantage, with reviewers praising the sheer range and breadth of Apple Watch apps.

The app ecosystem is strong, with reviewers citing many apps and plenty of smartwatch functionality.

Bands score well for easy swapping, backward compatibility, comfort, and variety, though the Milanese loop drew a pinching complaint.

Band quality is mixed to positive, with easy swaps and a robust strap system offset by dirt buildup and a hit-or-miss release mechanism.

Battery life is the most praised upgrade, usually lasting a full day plus sleep tracking, though a few reviewers still dislike daily charging.

Battery life is a strength relative to other Galaxy Watches, but real-world results vary widely with always-on display, GPS, and travel use.

Blood oxygen tracking is treated as a welcome restored capability that makes the watch feel more complete as a health device.

Blood oxygen tracking drew a clear caveat, with one reviewer repeatedly seeing lower SPO2 results than expected from other sensors.

Brightness is strong at 2,000 nits and works well outdoors, although one reviewer wished it matched brighter rivals.

Brightness is one of the clearest strengths, with reviewers repeatedly noting bright output and easy readability.

Build quality is described as more premium than the SE, with slimmer bezels and a more refined overall construction.

Build quality is a major strength thanks to the rugged titanium case, robust design, and adventure-ready construction.

Controls are mostly useful, especially the crown, side button, Double Tap, and wrist flick, but runners disliked the lack of a dedicated lap or Action button.

Button controls are polarized: reviewers like the programmable/quick button, but one long-term reviewer had repeated accidental presses and wanted better workout shortcuts.

Call handling is strong, with clear calls in noisy conditions and Call Screening called a personal favorite.

Charging convenience is improved because top-ups during a shower or morning routine make sleep tracking easier, though it still needs regular charging.

Charging convenience is hurt by Samsung omitting the wall charger, which one reviewer called stingy.

Charging speed is consistently praised, with many reviewers calling 15-minute top-ups and fast charging genuinely useful.

Workout Buddy and coaching features draw mixed reactions: some found the voice feedback encouraging or promising, while others found it annoying, limited, or less useful than a real coach.

Coaching features are a standout, especially Running Coach, which reviewers found useful, personalized, or exceptionally effective.

Comfort is a strong point: reviewers repeatedly describe the Series 11 as slim, light, and suitable for 24/7 wear and sleep tracking.

Comfort varies by reviewer: some found it comfortable, including for sleep, while others felt the weight and bulk.

Companion app quality is mixed: the apps expose lots of data, but reviewers disliked needing multiple apps or digging through the Health app.

Companion app quality is mixed because Samsung still splits settings and health data across separate apps.

Apple Pay on the watch is singled out as a favorite everyday convenience.

Cross-platform compatibility is a weak point because reviewers explicitly treat the watch as best for iPhone users and not Android users.

Cross-platform compatibility is limited: reviewers note Android support but no current iPhone compatibility.

Customization is strong, with praise for watch-face variety, case/material choices, and the broader range of configuration options.

Customization is strong for widgets, dashboards, watch faces, and tiles, but workout data-screen customization drew a complaint.

Display quality is a major strength, with repeated praise for the wide-angle OLED, vivid colors, big screen, and overall usability.

Display quality is consistently praised as vibrant, large, detailed, scratch-resistant, and excellent overall.

Durability is one of the clearest upgrades, with many reviewers reporting no scratches and praising tougher Ion-X glass.

Durability is excellent across reviews, from chassis feel to military-standard claims and real-world wear with little damage.

The ECG feature receives strong support from a reviewer’s real family example where on-watch ECG readings caught an irregular rhythm missed elsewhere.

ECG is treated positively as part of Samsung Health Monitor’s useful health-tool set rather than as a deeply tested medical feature.

Fit is generally good thanks to slimness and size choices, though one reviewer with smaller wrists found the larger case somewhat big.

Fit is context-dependent: one reviewer liked the big watch on their wrist, while another found it too large.

Fitness tracking is generally judged accurate and reliable, especially for casual workouts and running, with strong heart-rate and GPS foundations despite sport-watch limitations.

Fitness tracking is broadly positive for running and general activity, though scientific testing framed performance as good enough rather than best-in-class.

GPS accuracy is good to excellent in real-world testing, though reviewers note it lacks dual-frequency GPS and can trail dedicated sports watches in tougher conditions.

GPS accuracy is praised by several mainstream reviewers, but scientific testing found visible deviations and placed it behind stronger sports watches.

Reviewers describe the health suite as broad, reliable, and health-focused, with comprehensive sensors and useful monitoring; no reviewer found the core health tracking weak.

Health-tracking accuracy is mixed: reviewers praised some running-related readings, but questioned HRV, blood oxygen, antioxidant-style metrics, and scientific testing placed Samsung below top-tier rivals.

Heart-rate evidence is consistently strong, with lab recognition, close agreement against chest straps or competing watches, and only minor caveats about early warm-up variation.

Heart-rate accuracy is generally good for running and daily fitness, though scientific testing still found better wrist options and exercise-dependent limits.

5G/cellular connectivity is considered useful for phone-free use and more efficient data access, but several reviewers see it as situational rather than a universal reason to upgrade.

LTE is a meaningful advantage for users who want to run or stay reachable without carrying a phone.

Navigation support is strong when paired with iPhone or third-party apps, with wrist directions and run maps praised as useful.

Mapping and navigation benefit from larger storage for offline maps and route-related use, especially for outdoor users.

Materials quality is positive overall, with praise for light aluminum and premium titanium, though some finishes are mainly aesthetic upgrades.

Materials quality is excellent, with praise for titanium, ruggedness, and corrosion-resistant construction.

Menu navigation is praised as simple and easy, helped by the large touchscreen and straightforward controls.

Menu navigation is mixed: the digital bezel and haptics help, but reviewers miss a rotating bezel/crown and find usability reduced.

Music/media handling during workouts is useful enough to help motivation, though evidence is limited to one reviewer’s workout experience.

Onboard music and storage are valuable for Spotify, podcasts, media, and offline use, especially now that storage is doubled.

watchOS 26 feels polished and fluid overall, but Liquid Glass readability drew mixed reactions from a few reviewers.

The operating system experience is improved by One UI 8, with more functional UI elements and praised new software features.

Outdoor visibility is excellent, with reviewers praising off-angle visibility, direct-sun readability, and wide-angle viewing.

Outdoor visibility is excellent, with multiple reviewers saying the display remains readable in direct sunlight.

Pairing and setup are described as quick and easy, supporting strong pairing reliability.

Pairing reliability is excellent in the Notebookcheck test, where the watch was recognized and set up without issues.

Recovery insights are a repeated weakness: reviewers wanted readiness, body battery, HRV, or deeper training-analysis features beyond Apple’s current sleep and training metrics.

Recovery-style guidance is a weak spot in one long-term review, where the energy score felt redundant and unhelpful.

Reliability evidence is positive, with reviewers praising predictable battery drain and dependable passive health information.

Reliability is mostly good, but Notebookcheck reported brief display interruptions during always-on display use.

Safety features are strongly valued, especially hypertension alerts, fall detection, and potentially life-saving health notifications.

Safety features are helped by LTE, which one reviewer valued for safer phone-free running.

Size options are well received, with 42mm and 46mm choices helping smaller and larger wrists.

Size options are limited by the single large case, and multiple reviewers describe the Ultra as very big.

Sleep tracking is useful and often accurate for duration and trends, but several reviewers thought Sleep Score could be overly generous or less holistic than Oura and other systems.

Sleep tracking earns mixed marks: reviewers liked the score and some stage consistency, but noted low awake detection and second-tier sleep-stage performance.

Notification handling is quick and useful, with wrist-flick dismissal praised as a convenient way to deal with alerts.

Notification handling is positive, with one reviewer noting detailed, useful notifications from the watch.

Reviewers consistently frame Series 11 as an outstanding, well-rounded smartwatch with strong everyday utility and iPhone integration.

Core smartwatch features are strong, but some reviews temper praise by noting the 2025 model adds few meaningful upgrades.

Software smoothness is a standout strength; reviewers repeatedly describe apps, scrolling, and watchOS performance as fast, smooth, or snappy.

Software smoothness is strong in direct testing, with smooth operation and quick app launches.

Step counting is strong during normal arm-swinging walks, with a caveat that carts or strollers reduce accuracy.

The design is widely liked as slim, polished, and attractive, although reviewers emphasize it is familiar and only lightly changed from Series 10.

Style is subjective: one reviewer loved the stylish look, while another disliked the rugged, masculine aesthetic.

Third-party app support is a clear strength, especially for sports and customization apps such as WorkOutDoors.

Third-party app support benefits from extra storage and useful fitness/media apps, giving users more room for services beyond Samsung’s own tools.

Touchscreen responsiveness is good in normal use, but one runner found the curved screen harder to tap while moving.

The interface is widely liked for ease of use and polish, though Liquid Glass reduced glanceability for some reviewers.

The user interface is functional and approachable, though at least one reviewer found parts of the visual design odd.

Value is mixed: Series 11 is praised for first-time buyers and older-watch upgrades, but reviewers often prefer SE 3 or discourage Series 10 owners from upgrading.

Value for money is the most contested attribute: reviewers like the watch itself but often question the 2025 refresh and launch price.

Voice assistant feedback is mostly positive thanks to on-device Siri and call screening, though one reviewer wanted more useful context-aware voice features.

Gemini makes the voice assistant experience notably useful and convenient, especially because the watch screen is small.

Watch faces are generally liked for variety and aesthetics, but some new faces are less legible or less useful for quick time checks.

Watch faces are a major strength, with reviewers praising Samsung’s selection, visual quality, and customization.

Water resistance is viewed positively for swimming and snorkeling use, though one reviewer saw an open-water test abnormality before a clean retest.

Water resistance is treated positively for pool, rain, snow, and diving-oriented use.

Wellness insights earn praise for hypertension alerts, Sleep Score clarity, and digestible health summaries, while a few reviewers wanted more depth.

Wellness insights are useful when they explain metrics or provide coaching, though some newer metrics remain questionable.

Workout variety is viewed positively because the watch tracks many workout types and benefits from guided training-plan apps, especially for beginners.

Workout variety is a strength, with reviewers praising broad activity support, multisport-style capabilities, and Samsung’s wide exercise list.