Compare Garmin Forerunner 255S vs Samsung Galaxy Watch Ultra (2025)

Workout auto-detection is broadly useful, with reviewers citing automatic workout detection and reliable walk detection, though manual starts remain better for some activities.

Connect IQ adds watch faces, data fields and apps, but reviewers describe the ecosystem as useful rather than Apple-level and sometimes limited.

The app ecosystem is a strength: reviewers mention many available apps, Google Play access, and expanded usefulness from the extra storage.

Reviewers consistently liked the silicone strap, calling it comfortable, adjustable, exercise-ready and tough enough for regular training use.

Band feedback is mostly positive for comfort, stability, and easy removal, though one reviewer noted dirt collecting in the strap holes.

Battery life is a major strength, commonly landing around a week or more, though music, GPS and oxygen monitoring can reduce it.

Battery life is one of the clearest strengths, often described as the best in Samsung’s lineup, though heavy GPS or always-on use can reduce it.

Blood oxygen tracking is present for sleep or daytime monitoring, but reviews treat it as one metric among many rather than a standout feature.

Blood oxygen tracking is present across the health sensor set, but one long-term reviewer found SpO2 readings routinely low.

Bluetooth headphone pairing is generally workable and music-friendly, though one long-term user found headphone pairing slow and frustrating.

Bluetooth support is present, including Bluetooth 5.3 mentions, but external sensor connections were criticized or described as unavailable.

Brightness control is handled through physical buttons and fits the watch’s practical, low-key outdoor design.

Brightness earns strong praise, with reviewers citing high nits, bright AMOLED output, and easy readability.

Build quality is generally solid for a lightweight polymer watch, with durable long-term impressions but some concern about scratch-prone Gorilla Glass.

Build quality is consistently praised through the rugged titanium case, durable chassis, and robust construction.

The five-button layout is repeatedly praised for workouts, water use and avoiding accidental touches, even if it requires adjustment.

Button controls are mixed: reviewers like the Quick/action button and programmable shortcuts, but one long-term reviewer disliked accidental presses and limited workout button behavior.

Call handling is basic: Android users can respond or reject calls through the watch, but it still relies heavily on the paired phone.

Call handling is supported through Bluetooth calling, speaker/mic use, and smartwatch features for calls and texts.

Calorie tracking is included as part of the activity metrics, but the evidence is limited to feature availability rather than deep accuracy testing.

Charging is functional but not premium; Garmin’s common cable is convenient for Garmin owners, while the proprietary setup feels dated to one reviewer.

Charging is wireless and reasonably convenient, but one reviewer criticized the missing wall charging block.

Charging speed gets limited but positive evidence, with one review reporting a full charge in about 95 minutes.

Coaching features are a clear strength, with Garmin Coach, suggested workouts, race tools and personal-trainer-like prompts repeatedly highlighted.

Coaching features are a real addition, especially Running Coach, with reviewers describing personalized plans and guidance.

Comfort is one of the strongest points, especially for sleep and long workouts, because the smaller case feels light and unobtrusive.

Comfort depends on wrist and expectations: some reviewers found it comfortable, while others felt the weight or bulk.

Garmin Connect is useful and reliable for setup, syncing, visualization and customization, though music setup and app separation can confuse newcomers.

The companion app setup is useful but split, with health and smartwatch settings divided between Samsung Health and Galaxy Wearable.

Garmin Pay and NFC are supported and useful, but reviewers note Garmin’s payment system lacks the polish or bank support of rivals.

Contactless payments are supported through Samsung Wallet or Samsung Pay shortcuts.

The watch works across Android and iOS, with a consistent Garmin Connect experience, though Android gets better message response support.

Cross-platform compatibility is limited: reviews say it works with Android but not iPhone, with the best experience tied to Samsung phones.

Customization is strong, covering workout data screens, watch faces, colors, app settings and per-activity tracking options.

Customization is strong across programmable buttons, widgets, tiles, colors, and watch-face data.

The MIP display is practical and readable rather than flashy, with reviewers trading away AMOLED vibrancy for battery life and outdoor usability.

Display quality is a major strength, with repeated praise for the large, vibrant AMOLED display.

Durability looks good in longer-term use, with reviewers reporting little wear, though the bezel and glass can still be scratch concerns.

Durability is a standout, backed by titanium construction, MIL-STD claims, scratch protection, and reviewer reports of little damage.

ECG functionality is widely listed as part of the health feature set, though one review notes Samsung-phone pairing requirements for ECG and blood pressure.

Fit is excellent for smaller wrists, with the 41mm case repeatedly described as comfortable and well-sized.

Fit is polarizing: it can fit some larger wrists well, but reviewers also note the single 47mm size and large wrist footprint.

Fitness tracking is broadly accurate and analysis-rich, especially for endurance training, with some caveats around live heart-rate smoothing.

Fitness tracking accuracy is generally good for everyday and running use, though scientific testing places it below the top alternatives.

GPS accuracy is a major strength thanks to multiband GNSS, though a few reviewers saw small variations or altitude inaccuracies in specific scenarios.

GPS accuracy is good in several reviewer tests and supports dual-frequency GPS, but scientific testing found some route deviation.

Health tracking is useful but training-oriented; reviewers appreciated HRV and recovery metrics while noting it is not a full health wearable.

Health tracking is feature-rich but mixed in accuracy, with strong sensor coverage offset by questionable antioxidant, HRV, and some sleep-stage findings.

Heart-rate accuracy is generally strong for a wrist watch, often close to straps, but reviewers still recommend straps for the sharpest live accuracy.

Heart-rate accuracy is strongest in running evidence, with one reviewer matching a Polar strap closely, while scientific testing calls it good rather than elite.

LTE is a consistent advantage because it is standard or broadly available, though one reviewer notes carrier setup can cost extra.

Navigation support is useful through offline maps, Google Maps routing, and GPS widgets, but one reviewer notes no built-in maps on-watch.

Materials are typical Garmin Forerunner fare: lightweight polymer, Gorilla Glass and silicone, chosen more for sport practicality than luxury.

Materials quality is strong, centered on titanium, sapphire/robust design references, and corrosion-resistant claims.

Menu navigation is the clearest weakness, with several reviewers calling it complex or confusing despite button-control advantages.

Menu navigation is mostly straightforward through swipes, app drawers, digital bezel haptics, and simple operation.

Music controls are present for phone audio, and the watch exposes quick music controls from the button interface.

Music features are useful for downloaded Spotify, streaming, media tiles, and larger storage for music.

Onboard music is a useful feature with storage for offline audio, but setup and loading can be slow or confusing for some users.

Onboard storage is a clear 2025 upgrade, repeatedly described as 64GB and useful for music, apps, and offline maps.

The operating system is familiar and capable, with one reviewer praising its ease while others note Garmin’s learning curve.

The operating system experience benefits from One UI 8/Wear OS updates, Gemini, Now Bar, and refreshed interface features.

Outdoor visibility is excellent because the MIP display remains readable in sunlight with very little glare.

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

Pairing and acquisition are mostly reliable, especially GPS and Bluetooth headphones, but headphone pairing frustrated one user.

Pairing and setup reliability are positive where tested, with instant recognition and quick setup noted.

Recovery insights are a strong training feature, including HRV, Body Battery, Training Load and Morning Report-style readiness context.

Recovery-style insights are mixed: vascular load interests some reviewers, while HRV and related metrics draw skepticism.

Reliability is supported by long-term updates and GPS stability, with Garmin’s longevity praised in follow-up use.

Reliability is mostly acceptable but not flawless, with one review noting brief display interruptions and another calling performance not horrible rather than perfect.

Safety features exist through optional Garmin tools such as LiveTrack, though the reviews provide limited evaluation beyond availability.

Safety features include fall detection, emergency siren references, sleep apnea alerts, and related health/safety setup options.

Size options are a standout benefit because the 255S gives smaller wrists a serious multisport watch without losing core training tools.

Size options are limited by the single large 47mm format, though the band can fit a range of wrists and the screen size appeals to some users.

Sleep tracking is viewed as useful and reasonably aligned with other devices, though not as deep as dedicated sleep-focused wearables.

Sleep tracking is useful and improving, but reviewers disagree on sleep stages and awake-time accuracy.

Smartphone notifications work well for basic alerts and quick replies, especially on Android, but remain constrained by the small non-touch screen.

Smartphone notifications are well supported, with reviewers noting detailed notification views and suggested replies.

Smartwatch features are useful but intentionally basic, prioritizing training over app-rich Apple, Google or Samsung-style smartwatch polish.

Smartwatch features are broad, including LTE, calls, texts, Gemini, Now Bar, storage, and Samsung’s full watch software stack.

Software smoothness is generally good, with smooth app launches and more functional One UI behavior, despite occasional reliability caveats.

Step counting appears accurate in the reviewer evidence, including a near-spot-on manual step check.

Step counting is positive in basic walking tests, but one reviewer notes accuracy drops when arms are not swinging.

Stress tracking is available as part of the broader health suite, with reviewers presenting it as a daily wellness metric.

Stress tracking is included in Samsung’s health sensor set, though the reviews provide feature evidence more than accuracy testing.

Style is utilitarian rather than flashy, but reviewers consider it acceptable for everyday wear if you choose muted colors.

Style is divisive: some reviewers like the rugged, colorful, stylish look, while others find it bulky or not pretty.

Third-party app support exists through Connect IQ, Strava, Komoot and music apps, but reviewers describe it as limited versus mainstream smartwatches.

Third-party app support is solid through Google Play, fitness apps such as Strava and Map My Run, and a growing Wear OS app selection.

Touchscreen responsiveness scores poorly because the watch has no touchscreen; reviewers mostly frame that as a deliberate sport-watch tradeoff.

Touchscreen responsiveness and gesture operation are described as intentional and straightforward in the long-term review evidence.

The interface is powerful but polarizing: some find it easy once learned, while newcomers can find it dense or confusing.

The user interface is improved and functional, though some reviewers dislike parts of the visual layout.

Value is strong for runners and multisport users, especially given multiband GPS, battery life and training depth at a midrange price.

Value for money is the main weak point because reviewers repeatedly question the high price and minimal 2025 hardware changes.

Voice assistant quality is a strength with Gemini, which reviewers describe as convenient, useful, and directly available on the wrist.

Watch face support is good through built-in faces and Connect IQ, with reviewers noting customization and many free options.

Watch faces are a strength, with reviewers praising quantity, customization, and Samsung’s polished face designs.

Water resistance is strong for swimming, rain and shower use, and physical buttons are an advantage around water.

Water resistance is a strong feature, with reviews citing 5ATM/10ATM ratings, IP68 claims, and pool/rain/snow use.

Wellness insights such as Morning Report, Body Battery and general wellbeing metrics are useful companions to the training focus.

Wellness insights are useful but uneven: sleep coaching and vascular load get interest, while energy score and antioxidant index receive skepticism.

Wi-Fi support is present across connectivity mentions, including LTE/Wi-Fi model references.

Workout variety is extensive, spanning running, cycling, swimming, hiking, yoga, triathlon and dozens of app-manageable workout types.

Workout variety is strong, with reviewers citing many tracked activities, multisport/triathlon capability, and broad exercise lists.