Compare Samsung Galaxy Watch Ultra (2025) vs Samsung Galaxy Watch 9

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 results are mixed. Several controlled workouts track closely to chest straps, but other tests show startup errors, cadence lock, wider ranges, or weaker performance in difficult activities.

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

Dual-frequency GPS is usually a strength, producing accurate routes in open areas, cities, and even dense woodland. Some tests still show slow initial lock, cut corners, building errors, or imperfect elevation.

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 is often very good, with some tests closely matching dedicated reference devices and accurately capturing sleep timing. Other reviewers report optimistic scores, missed wake-ups, or gaps, so consistency is not perfect.

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 is generally reliable across common workouts, with strong results for runs and everyday exercise. Accuracy can vary by activity, and tougher motion patterns expose more errors.

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

Cardio Load and related recovery guidance can help decide when to push harder or back off. Some runners find the targets jumpy or overly strict, so the guidance is not universally trusted yet.

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

Sleep and training coaching are generally useful for turning raw tracking into practical goals. They are most valuable when enough nights and workouts have accumulated for personalized guidance.

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

Workout coverage is broad enough for most casual and serious users, spanning common gym, run, swim, and outdoor activities. Dedicated athletes may still miss specialized modes found on Ultra or sports-watch rivals.

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

Blood-oxygen readings looked very close to a medical-grade pulse oximeter in one direct comparison, giving this metric a strong accuracy result.

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

Step counting has a recurring false-step problem. Multiple testers report extra steps while driving or small overcounts in manual tests, making this one of the weaker basic fitness metrics.

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.

Core health measurements compare well with reference devices in several tests. Body-composition and broader health readings are useful for trends, though they should not be treated as medical-grade conclusions.

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

Samsung packs in a remarkably broad, subscription-free health suite with Vitals, Heart Health, Fitness Index, sleep and more. The main tension is interpretation: some find the context useful, while others see too many disconnected scores.

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

Comfort is one of the Watch 9's strongest traits. Its thin, light body sits close to the wrist, works well for sleep tracking, and is frequently described as easy to forget you're wearing.

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

The aluminum body keeps the Watch 9 light and comfortable, but reviewers comparing it with titanium Ultra models find it less rugged and less premium.

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

The 40mm and 44mm choices make it easier to balance wrist fit, screen size, and battery capacity. Reviewers see real value in having both rather than a single oversized model.

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 impressions vary widely by material and wrist. Some praise the light, soft feel and easy changes, while others find the silicone sweaty, sizing awkward, or Samsung's first-party bands poor value.

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

Sapphire glass, IP68, 5ATM, and military-grade ratings give the Watch 9 solid everyday toughness. It is less rugged than the Ultra line, but testers generally trust it for workouts, swimming, showers, and normal outdoor use.

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

The thin, minimal body and premium finish win many fans, but the circle-on-squircle look remains divisive. Some grow to like it while others still prefer Samsung's older fully round design.

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

The slim case generally fits wrists well and stays unobtrusive, especially for sleep. Strap sizing can be less forgiving, with some users landing between holes or at the edge of a supplied size.

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

The Watch 9 feels premium and well built despite using aluminum rather than the Ultra's more rugged materials. Its finish and everyday construction earn strong marks.

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

IP68 and 5ATM protection make the Watch 9 well suited to showers, rain, and swimming. It lacks the deeper diving credentials of the Ultra models, but everyday water resistance is strong.

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 is the clearest recurring weakness. A few testers approach two days or beat expectations, but most report daily charging, heavy drain with workouts or AOD, and little improvement over recent Galaxy Watches.

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

Charging is inconvenient for a watch built around round-the-clock health and sleep tracking. Daily top-ups and the loss of phone-based PowerShare make it harder to keep the watch on the wrist continuously.

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

Display quality is a major strength: sharp, vibrant, responsive, and premium-looking across sizes. Reviewers repeatedly describe the AMOLED panel as excellent even though it changes little from the Watch 8.

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

The 3,000-nit panel is consistently praised as bright enough for outdoor use. Even reviewers comparing it with brighter Ultra hardware generally consider the Watch 9's brightness more than sufficient.

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

Outdoor visibility is excellent. The 3,000-nit AMOLED remains easy to read in direct sun, during workouts, and from awkward angles with very few complaints.

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

Reliability concerns center on charging behavior and isolated software freezes. Most daily operation is stable, but charging inconsistency is serious enough to lower confidence for some testers.

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

Value depends heavily on what you already own and current street pricing. First-time buyers and older-watch upgraders see a strong package, while Watch 8 owners are repeatedly told the modest changes do not justify full price.

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

ECG is useful as part of Samsung's broad health suite, but its Galaxy-phone requirement sharply limits access for users of other Android brands.

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

LTE adds real phone-free usefulness for calls and data, but it also increases battery drain. That tradeoff matters most on a watch whose endurance is already limited.

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

Automatic workout detection is a standout strength, reliably picking up walks and even swims without manual starts. Multiple testers praised how little intervention it needs.

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

Hearing-exposure alerts are a useful addition for concerts and loud environments, but not everyone sees a regular use case. The Watch 9 also lacks some emergency health features available on certain rivals.

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

The Antioxidant Index draws mixed reactions. Some see dietary context in the beta-carotene estimate, while others find it of limited practical use.

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

The Watch 9 works broadly with Android, but important health and syncing features remain locked to Galaxy phones. That restriction is a repeated frustration for Pixel, OnePlus, and other Android users.

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

Navigation is functional but not athlete-leading. One sports-focused review specifically cites navigation among the areas that still lag dedicated training watches.

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

Samsung's menu structure is praised as intuitive and well organized, with important functions usually only a swipe or two away.

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

Samsung Health's redesign is widely praised for cleaner organization, customizable views, and better presentation of health data. The main complaint is setup friction when enabling the many advanced metrics.

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

Customization is extensive, spanning tiles, watch faces, complications, app layouts, colors, and shortcuts. Reviewers consistently appreciate how much can be tailored on-watch or from the phone.

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

One UI 9 Watch is widely praised as easy to navigate, well organized, and highly customizable. Tile stacks and gesture navigation help surface dense information without making the watch feel overwhelming.

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

The Watch 9 handles core smartwatch jobs—calls, notifications, apps, smart-home control, and assistant tasks—very well. Reviewers repeatedly describe it as a complete everyday smartwatch.

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

Physical controls are mixed. Accidental presses appear improved, but workout interaction can feel clunky and some reviewers still prefer more dedicated hardware controls.

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

Wear OS 7 with One UI 9 Watch is consistently praised as polished, mature, and pleasant to use. Samsung's refinements give the watch a strong everyday software experience.

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

Wear OS gives the Watch 9 a strong app selection, and tested Google and third-party apps generally run smoothly. This helps it feel like a full smartwatch rather than only a fitness tracker.

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

The 32GB storage is enough for several offline Spotify playlists, making phone-free listening practical even though capacity trails some rivals.

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

Notifications are a strong everyday feature, arriving reliably from a wide range of phone apps and helping users leave the phone in a pocket more often.

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 is excellent, with popular fitness, audio, navigation, and productivity apps available through Wear OS. That breadth is a major advantage over simpler fitness-first wearables.

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

Watch faces offer strong customization and useful information density, and several reviewers like the new defaults. One reviewer dislikes Samsung's visual style overall, so aesthetics remain personal.

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

Gemini is one of the Watch 9's best smart features, with fast responses and useful hands-free Raise to Talk access. Occasional gesture misses keep it from being flawless.

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

Performance is one of the biggest upgrades. Apps open quickly, scrolling is fluid, and the Snapdragon Wear Elite removes many of the tiny pauses that made older Galaxy Watches feel less polished.

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

Samsung-to-Samsung setup is clean and well integrated, with the phone automatically handling much of the companion software setup.

Bluetooth 6 is viewed as a meaningful upgrade because it can extend useful distance from the phone while improving efficiency.

On-wrist calls are useful for short conversations and moments when reaching for a phone is inconvenient. LTE versions add more independence when away from the phone.

Samsung Wallet payments are described as seamless and convenient, making wrist-based NFC purchases a useful everyday feature.

Touch input is consistently responsive, including swipes, typing, and the digital bezel. Reviewers report precise interaction even on the compact display.

Calorie estimates drew a clear accuracy complaint, with one long-term tester finding workout calories consistently overestimated enough to reduce their usefulness.

Fitness Index and other health scores can summarize complex data well, especially for strengths and weaknesses. At the same time, the growing number of scores can feel unfocused or overwhelming.

Charging speed is a major consensus complaint, often taking roughly 80-120 minutes and sometimes longer. A few tests were quicker, but inconsistency and slow short top-ups remain common frustrations.

The vibration motor is criticized as too weak, continuing a complaint from the previous generation and making alerts easier to miss.