Compare Samsung Galaxy Watch Ultra (2025) vs OnePlus Watch 3

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

Automatic workout behavior and auto-pause were well received where discussed, especially for walks and cycling.

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

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

The Wear OS app ecosystem was a clear strength, giving the watch broad app access and flexibility.

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.

Band quality was mixed, from highly comfortable and integrated to basic or irritating depending on reviewer and model.

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

Battery life was the strongest consensus attribute, praised in every review as class-leading or unusually long for Wear OS.

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

Blood oxygen readings were limited in coverage but strongly positive where tested against reference readings.

Bluetooth connectivity drew positive feedback in the one review that judged it directly, with no drops or latency issues reported.

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

Brightness was praised, especially for workouts and daylight readability.

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

Build quality was mostly premium, though the 43mm version drew complaints for feeling cheaper.

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

Button controls were a standout: the functional rotating crown, haptics, and shortcut controls earned broad praise.

Call handling was usable, but speaker volume and loudness were recurring limitations.

Calorie tracking had a notable low point where one reviewer said goals triggered while merely sitting.

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

Charging convenience was mostly positive thanks to the small magnetic dock and USB-C-friendly design, though comfort-related charging avoidance appeared once.

Charging speed was consistently praised, with reviewers highlighting quick top-ups and fast full charges.

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

Coaching features lagged behind the hardware, with reviewers asking for more actionable guidance and deeper interpretation.

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

Comfort was split: many reviewers found it wearable or very comfortable, while others found the larger model heavy or awkward.

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

The OHealth companion app was mostly praised for clarity and layout, but setup, device switching, and customization drew caveats.

Contactless payments worked well where reviewers tested or discussed Google Wallet and NFC payments.

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

Compatibility was strong across Android phones but poor for iPhone owners, since reviewers repeatedly noted there is no iPhone support.

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

Customization was good for faces and buttons, but reviewers wanted more dashboard or personalization flexibility.

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

Display quality was a consistent strength, with reviewers praising the AMOLED panel, sharpness, and vividness.

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

Durability scored strongly, with reviewers citing rugged ratings, scratch resistance, and long-term wear without visible damage.

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

ECG was a major regional caveat: reviewers liked or valued the feature where available, but repeatedly criticized its absence in the US or North America.

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

Fit was the main ergonomic weakness, especially for smaller wrists or lug geometry, though the 43mm model improved this for some reviewers.

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

Fitness tracking was broadly solid for casual users, though reviewers warned that serious athletes may still prefer Garmin or chest-strap setups.

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

GPS accuracy was mostly praised, especially on runs and hikes, but dense city conditions and edge cases could still challenge it.

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.

Reviewers generally found the health platform improved and useful, but not consistently at Samsung, Google, or medical-grade depth.

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

Heart-rate accuracy was usually acceptable to good, especially at steady effort, but several reviewers noted lag or misses at high intensity.

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

LTE connectivity was the clearest missing smart feature, repeatedly criticized as absent.

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

Mapping and navigation were praised for walking directions, Google Maps usefulness, and richer workout maps.

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

Materials quality was praised for sapphire crystal, titanium bezel details, and premium-feeling construction.

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

Menu navigation benefited from the improved rotating crown, making scrolling through screens and menus easier.

Music controls and playback support were mixed: offline Spotify was useful, but Spotify switching could be janky.

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

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

The operating-system experience was generally smooth and capable, though mode switching or background wake delays could occasionally interrupt it.

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

Outdoor visibility was excellent across reviews, with repeated praise for direct-sunlight legibility.

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

Pairing and setup were mixed: setup could require retries, while some reviewers found it straightforward.

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

Recovery guidance was a weakness, with reviewers wanting more advanced load and recovery context.

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

Reliability was positive overall, with smooth daily use, stable phone switching in some cases, and strong long-term impressions.

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

Safety features were mixed: fall detection and SOS helped, but some reviewers wanted more detection features or noted regional gaps.

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

Size options were a frequent concern for the larger model, partly relieved by the 43mm version but still criticized in some reviews.

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

Sleep tracking drew mostly positive feedback, with reviewers praising detection and sleep-stage accuracy, though interpretation could vary.

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

Notifications were generally prompt and useful, with large-screen readability and decent filtering options.

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

Core smartwatch functionality was widely praised, with reviewers calling it complete and capable for everyday use.

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

Software smoothness was a major strength across reviews, with only isolated reports of sluggishness or UI lag.

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

Step counting was praised in one detailed comparison as very close to manual counts.

Stress tracking was mixed, ranging from vague and unhelpful to a basic wellness-style readout rather than deep stress guidance.

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

Style and design were mostly praised as premium, traditional, and attractive, with the 43mm design drawing the main negative notes.

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

Third-party app support was strong through Play Store access and Google services, though individual apps could still have quirks.

Touchscreen responsiveness was praised in the review that explicitly judged the display as responsive.

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

The user interface ranged from easy and polished to unintuitive depending on reviewer and workflow.

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

Value for money was generally strong, especially around battery and features for the price, though some reviewers questioned value versus discounted rivals.

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

Voice assistant feedback was limited but positive, with one reviewer finding Google Assistant very fast.

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

Watch faces were generally useful, attractive, and customizable, though one reviewer found the video face clunky.

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

Water resistance was positively judged in real-world immersion use, with no reported problems afterward.

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

Wellness insights were useful for some reviewers but too vague or light for others, producing a mixed consensus.

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

Workout variety was a strength, with many sports modes and pro modes, though some modes were described as generic.