Compare Garmin Vivoactive 6 vs Samsung Galaxy Watch Ultra (2025)

Auto activity detection can make workouts feel seamless, but one reviewer found it could also trigger quickly when not wanted.

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 is mixed: Connect IQ is appreciated, but the broader smartwatch app ecosystem is thin compared with Apple or Wear OS.

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

Band quality is mixed to weak: reviewers found comfort benefits, but also noted a less-premium feel, rubbing, or dirt retention.

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 a major strength, with most reviewers getting roughly a week or several days depending on always-on display and GPS use.

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 appears as part of the watch's broader accurate health-monitoring package, but reviewers did not deeply test it as a standalone feature.

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

Bluetooth connectivity is strong where tested, especially pairing external chest straps.

Brightness is good in the scored review, which found the display well-saturated and reasonably bright.

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

Build quality is good but not premium, with reviewers saying it feels well built while acknowledging less-rugged construction than pricier models.

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

Button controls are generally well-liked, with reviewers praising the raised button, simplicity, and tactile workout controls.

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 limited, especially for iPhone users and anyone wanting wrist-based calls or richer phone-free communication.

Charging convenience is mixed because the cable can click in securely, but the proprietary charger annoyed reviewers.

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

Charging speed is mixed: some found it quick, while another called the proprietary charging process slow.

Coaching features are useful when reviewers used Garmin Coach or structured training plans, but daily walk suggestions and smart alarms were less consistently helpful.

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

Comfort is one of the strongest points, with many reviewers calling the Vivoactive 6 light, unobtrusive, and easy to wear day and night.

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

The companion app is powerful but polarizing: it adds value and motivation for some reviewers while feeling complex or overwhelming to others.

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

Contactless payments are useful, but reviewer sentiment is tempered by Garmin Pay bank compatibility and smoothness limitations.

Cross-platform compatibility is a strength because reviewers note it works well with Android and iOS, even if some features favor Android.

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

Customization is strong where reviewed, especially the ability to put more data fields on workout screens.

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

Display quality is a clear strength, with reviewers praising the AMOLED screen as vibrant, sharp, readable, and gorgeous.

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

Durability is mixed: Gorilla Glass and daily wear impressed some reviewers, while another saw scratches on the display.

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

ECG is a clear limitation because reviewers repeatedly note that the Vivoactive 6 lacks ECG support compared with higher-end Garmin models.

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 for many wrists, though it depends on preference and the single-size design.

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

Fitness tracking accuracy is generally strong for everyday users, with reviewers calling activity tracking reliable and accurate compared with competing watches.

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 mostly good and often impressive for the price, but reviewers noted real-time pace issues, built-up-area errors, and older GPS tech limitations.

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

Reviewers found core health metrics broadly accurate when compared with other trackers, with one review describing the health suite as impressively accurate overall.

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 mixed: several reviewers found it reliable for steady workouts, but many saw lag, dips, or weaker results during intervals, rapid changes, and weightlifting.

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

LTE connectivity is absent, and at least one reviewer explicitly hoped for LTE support.

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

Mapping and navigation are useful for breadcrumb routes and course following, but reviewers warn that there are no full maps and trail navigation remains limited.

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

Materials quality is mixed because the plastic helps weight but also makes the watch feel less premium.

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

Menu navigation is improved overall, but some Garmin menu logic and changed shortcuts still frustrated reviewers.

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

Music controls are useful for controlling phone playback from the wrist, according to one reviewer.

Onboard music storage is a well-liked strength, especially with doubled storage and phone-free listening.

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, with reviewers calling the redesigned UI easier, cleaner, and more approachable.

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

Outdoor visibility is strong, with multiple reviewers reporting good readability in bright daylight or direct sun.

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

Pairing reliability is strong, with easy setup and external sensor pairing described as breezy.

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

Recovery insights are a strength, with reviewers praising Body Battery, Sleep Need, and recovery-aware recommendations as genuinely useful day-to-day context.

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

Reliability is mixed-positive: Garmin's core platform was praised, but move alerts and some reminders were not always dependable.

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

Safety features are well-regarded, especially LiveTrack and incident detection for solo workouts or outdoor use.

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

Size options are limited because the watch only comes in one size.

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

Sleep tracking is useful for broad sleep reports, but accuracy is uneven: some reviewers found it good, while others reported overreporting, missed sleep periods, or unreliable sleep-stage data.

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

Notifications are good for basic smartwatch use, with reviewers finding them pleasant or just enough, though the experience is not equal to a full smartwatch.

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

Smartwatch features are adequate for fitness-first users, but reviewers stress that the Vivoactive 6 remains more fitness watch than full smartwatch.

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

Software smoothness is praised in the scored evidence, with one reviewer finding the watch fast and smooth in use.

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

Step counting is generally reliable against other trackers, though one reviewer saw an inconsistent first test before better later results.

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

Stress-related tools were viewed as useful, especially when tied into Body Battery and guided breathing features.

Style and design are strong, with reviewers describing a premium-looking, understated design that works beyond workouts.

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

Third-party app support is one of the most consistent weaknesses, with several reviewers saying Garmin lacks the breadth of Apple or Wear OS apps.

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 strong, with reviewers calling it responsive, readable, and easy to interact with.

The user interface is a strong upgrade, with reviewers describing it as easier, more intuitive, and simple to use.

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

Value for money is one of the strongest themes, with reviewers repeatedly calling the Vivoactive 6 a strong deal or worth the price.

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

Voice-assistant quality scores low because reviewers repeatedly pointed out the lack of microphone, speaker, and voice-enabled features.

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

Watch face quality is positive in the scored review, with Connect IQ offering many watch-face options.

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

Water resistance is positively viewed for casual swimming, showering, and workout use.

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

Wellness insights are helpful overall, especially Sleep Coach, Active Intelligence, and health summaries, though smart alarm feedback was more mixed.

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

Workout variety is a major strength thanks to the expanded sport profiles, running tools, animations, and broad activity coverage, though niche omissions remain.

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