Average score
Product 1: Polar Grit X Pro
3.8
Product 2: Garmin Forerunner 570
4.2
app ecosystem
Product 1: Polar Grit X Pro
4.2

Polar Flow is available on phone and web and syncs with services like Strava, TrainingPeaks, and Komoot, but the ecosystem is selective rather than wide open.

Product 2: Garmin Forerunner 570
3.7

The app ecosystem is useful but not expansive. Reviewers mention ConnectIQ apps and data fields, while also noting that Garmin’s ecosystem feels more limited than watchOS or Wear OS.

band quality
Product 1: Polar Grit X Pro
4.5

The strap is repeatedly praised for feeling stretchy, secure, and better than many generic silicone-style bands.

Product 2: Garmin Forerunner 570
4.5

Band quality is good, with soft silicone straps and positive comments about long-term wear and durability.

battery life
Product 1: Polar Grit X Pro
3.8

Battery life is a real strength for a training watch, usually landing around 4–7 days or about 40 hours GPS, but reviewers repeatedly say it is not class-leading and can drain faster with heavy features enabled.

Product 2: Garmin Forerunner 570
3.2

Battery life is the biggest tradeoff. Some reviewers still found it good in normal use, but many say the brighter screen makes it noticeably weaker than the 265, especially with always-on display.

blood oxygen tracking
Product 1: Polar Grit X Pro
No score yet
Product 2: Garmin Forerunner 570
4.0

The watch includes blood-oxygen-related health sensing, with reviewers mentioning a pulse oximeter and overnight blood-oxygen or saturation tracking as part of the health stack.

Bluetooth connectivity
Product 1: Polar Grit X Pro
4.0

Bluetooth support is useful for phone syncing, external straps, and heart-rate broadcasting, though the overall connectivity story is limited by the lack of ANT+.

Product 2: Garmin Forerunner 570
4.3

Bluetooth support is functional for phone-linked features and external sensor pairing, including Bluetooth and ANT+ accessory support.

brightness
Product 1: Polar Grit X Pro
3.9

Brightness and backlight options are helpful, but the display is clearly tuned more for battery efficiency than punchy brilliance.

Product 2: Garmin Forerunner 570
4.9

Brightness is a standout strength, with multiple reviews describing the screen as one of Garmin’s brightest and easiest to read outdoors.

build quality
Product 1: Polar Grit X Pro
4.4

Reviewers consistently describe the watch as solid, premium-feeling, and well thought out in its construction.

Product 2: Garmin Forerunner 570
4.6

Build quality feels premium for the line, with one review explicitly describing it as a high-quality watch.

button controls
Product 1: Polar Grit X Pro
4.6

The physical buttons are a highlight for feel and grip, though some reviewers still experienced lag after pressing them.

Product 2: Garmin Forerunner 570
4.7

Button controls are one of the watch’s practical strengths. Reviewers like the five-button layout and say it works reliably when touch is less convenient.

call handling
Product 1: Polar Grit X Pro
3.5

Call handling is basic: the watch can surface call-related phone interactions and silence calls, but it is not a full call-management smartwatch.

Product 2: Garmin Forerunner 570
4.0

Call support is a useful upgrade rather than a must-have killer feature. Reviewers generally found wrist calls workable and clear enough when paired to a phone.

charging convenience
Product 1: Polar Grit X Pro
4.3

The charging setup is easy to connect and practical to use, especially compared with fussier port-based designs.

Product 2: Garmin Forerunner 570
2.8

Charging convenience is less impressive. Reviewers specifically wanted wireless charging and also called out the proprietary cable setup.

charging speed
Product 1: Polar Grit X Pro
4.0

Charging speed is respectable rather than exceptional, with a full recharge taking about 1 hour 45 minutes.

Product 2: Garmin Forerunner 570
4.5

Charging speed is fine in practice, with one long-term reviewer saying it can top up from empty to full during a shower.

coaching features
Product 1: Polar Grit X Pro
4.5

FitSpark and the guided tests are standout strengths, giving users useful workout suggestions and coaching-oriented training guidance.

Product 2: Garmin Forerunner 570
4.6

Coaching features are well developed, especially for runners and triathletes. Garmin Coach plans, daily suggestions, and structured guidance were consistently praised.

comfort
Product 1: Polar Grit X Pro
4.5

Comfort is a clear positive, with reviewers saying it wears well and avoids feeling bulky in normal use.

Product 2: Garmin Forerunner 570
4.6

Comfort is a major plus. Across sizes and use cases, reviewers repeatedly say the watch is easy to wear for workouts, daily use, and even overnight.

companion app quality
Product 1: Polar Grit X Pro
3.0

Polar Flow is rich and informative, but several reviews say it can feel intimidating, cluttered, or clunky for newcomers.

Product 2: Garmin Forerunner 570
4.0

Garmin Connect is usually viewed positively for depth and data richness, though the new subscription layer is a recurring annoyance in the reviews.

contactless payments
Product 1: Polar Grit X Pro
1.0

The watch does not offer contactless payments, and reviewers treat that omission as a clear smartwatch limitation.

Product 2: Garmin Forerunner 570
4.3

NFC payments are available, giving the watch a useful everyday smartwatch feature beyond training tools.

cross-platform compatibility
Product 1: Polar Grit X Pro
4.2

It works across Android, iPhone, and Polar Flow on mobile and desktop, giving it solid cross-platform coverage.

Product 2: Garmin Forerunner 570
4.4

Cross-platform support looks good overall, with smooth iPhone use noted in one review and phone-assistant access highlighted in another.

customization options
Product 1: Polar Grit X Pro
4.5

Sport profiles, dashboards, watch-face views, and settings are all highly customizable for different preferences and activities.

Product 2: Garmin Forerunner 570
4.5

Customization is a strength. Reviews mention editable glance folders, assignable shortcuts, and flexible watch-face or data layout changes.

display quality
Product 1: Polar Grit X Pro
3.6

The MIP display is functional and efficient, with good utility outdoors, but multiple reviews say it looks dull, low-contrast, or less vibrant indoors.

Product 2: Garmin Forerunner 570
4.8

Display quality is excellent. Reviewers repeatedly call the AMOLED screen brighter, sharper, clearer, and more vivid than the previous generation.

durability
Product 1: Polar Grit X Pro
4.7

Durability is one of the strongest recurring themes thanks to sapphire glass, rugged construction, and repeated praise for scratch resistance.

Product 2: Garmin Forerunner 570
4.6

Durability impressions are positive. Reviewers mention scratch resistance, pristine condition after use, and very little visible wear over time.

ECG functionality
Product 1: Polar Grit X Pro
No score yet
Product 2: Garmin Forerunner 570
1.5

ECG is a clear miss. Reviewers repeatedly call out that the Forerunner 570 lacks ECG despite using Garmin’s newer sensor hardware.

fit
Product 1: Polar Grit X Pro
4.5

Fit is consistently described as snug and secure, helped by strap sizing and a wrist-friendly shape.

Product 2: Garmin Forerunner 570
4.8

Fit is excellent when sized correctly, with reviewers describing the watch as secure, flush on the wrist, and almost second-skin-like.

fitness tracking accuracy
Product 1: Polar Grit X Pro
4.2

General fitness tracking is dependable enough for serious training, especially for multisport and power-based use, though no reviewer presents it as flawless.

Product 2: Garmin Forerunner 570
4.7

Fitness tracking is broadly praised, with one review calling the core tracking accuracy second to none for the watch’s main sports focus.

GPS accuracy
Product 1: Polar Grit X Pro
4.1

GPS accuracy is generally good and reliable, but it is not the sharpest in class and occasional drift or limitations versus newer dual-band rivals are noted.

Product 2: Garmin Forerunner 570
4.8

GPS accuracy is one of the strongest areas. Across city runs, trails, and side-by-side tests, reviews consistently describe tracking as excellent, flawless, or near flawless.

health tracking accuracy
Product 1: Polar Grit X Pro
4.8

Health-related tracking is strongest around HRV, sleep, and recovery data, which reviewers repeatedly describe as especially accurate and useful.

Product 2: Garmin Forerunner 570
4.3

Health stats are generally described as good, with one data-driven review calling overall stat accuracy solid and another saying heart-rate and sleep-stage tracking are pretty good.

heart rate accuracy
Product 1: Polar Grit X Pro
4.1

Heart-rate accuracy is mostly good to very good, but interval sessions and higher-intensity efforts still expose some inconsistency.

Product 2: Garmin Forerunner 570
4.6

Heart-rate tracking is a major strength. Multiple reviewers say it stays close to chest straps, performs well in intervals, and is one of Garmin’s better recent sensors.

materials quality
Product 1: Polar Grit X Pro
4.7

Sapphire glass, stainless steel, and other premium materials noticeably elevate the watch’s perceived quality.

Product 2: Garmin Forerunner 570
4.4

Material choices are a step up from older mid-range Forerunners, especially the aluminum bezel and sturdier-feeling case construction.

menu navigation
Product 1: Polar Grit X Pro
3.3

Navigation through the interface can be simple in concept, but several reviewers say lag makes menus and dashboards slower than they should be.

Product 2: Garmin Forerunner 570
4.6

Menu navigation is easy to learn and generally straightforward, helped by the refreshed layout and button-plus-touch design.

music controls
Product 1: Polar Grit X Pro
4.0

Music controls work well for controlling phone audio during workouts and are one of the more genuinely useful smartwatch additions.

Product 2: Garmin Forerunner 570
4.1

Music controls are present and usable, including the ability to check what is playing from services like Spotify.

onboard music storage
Product 1: Polar Grit X Pro
1.0

There is no onboard music storage or local playback, so audio control depends on having a phone nearby.

Product 2: Garmin Forerunner 570
4.0

Onboard music storage is useful but not generous. Reviews note 8GB of storage and MP3 support, with some calling the capacity a bit stingy.

operating system experience
Product 1: Polar Grit X Pro
4.0

The daily software experience is more competitive than older Polar watches, but it still falls short of the polish offered by top smartwatch rivals.

Product 2: Garmin Forerunner 570
4.6

The overall software experience is modern and capable. Reviewers describe it as faster, more polished, and close in feel to Garmin’s higher-end models.

outdoor visibility
Product 1: Polar Grit X Pro
3.7

Outdoor readability is generally strong, especially in sunlight, though some reviewers wanted more contrast, larger text, or better bike-at-a-glance clarity.

Product 2: Garmin Forerunner 570
4.9

Outdoor visibility is excellent, with reviewers saying the display remains easy to read in bright sunlight and other tough conditions.

pairing reliability
Product 1: Polar Grit X Pro
2.5

Pairing is mixed: some sensors connect without issue, but finicky broadcasts and unsupported pairings show up often enough to matter.

Product 2: Garmin Forerunner 570
3.4

Pairing reliability is mixed. One reviewer found syncing smooth and seamless, while another reported repeated disconnect-and-reconnect behavior.

recovery insights
Product 1: Polar Grit X Pro
4.5

Recovery Pro, Nightly Recharge, HRV tracking, and leg-recovery tools are some of the watch’s biggest reasons to buy into Polar’s platform.

Product 2: Garmin Forerunner 570
4.6

Recovery guidance is strong. Reviews highlight training readiness, recovery time, and daily summaries that help frame when to push and when to back off.

reliability
Product 1: Polar Grit X Pro
4.2

Overall reliability is viewed positively, with reviewers often calling performance solid or reliable even when they point out individual weaknesses.

Product 2: Garmin Forerunner 570
4.7

General reliability is strong, with reviewers saying the watch can be relied on for training and that key controls remain responsive even after submersion.

safety features
Product 1: Polar Grit X Pro
4.0

Back-to-start routing, TrackBack-style tools, and daylight/navigation aids add real practical value for outdoor safety and getting home.

Product 2: Garmin Forerunner 570
4.4

Safety coverage includes Garmin’s Incident Detection and LiveTrack features for activity sharing and emergency notifications.

size options
Product 1: Polar Grit X Pro
3.5

Size flexibility comes more from small/large strap sizing and fit options than from multiple case sizes.

Product 2: Garmin Forerunner 570
4.1

Two case sizes broaden the fit range, and multiple reviewers specifically call out the benefit of having both 42mm and 47mm options.

sleep tracking accuracy
Product 1: Polar Grit X Pro
4.4

Sleep tracking is widely praised and regularly singled out as one of the best parts of the Polar experience.

Product 2: Garmin Forerunner 570
3.7

Sleep tracking is useful but not flawless. Reviews say it is reasonably accurate and helpful for readiness, though some found it less robust than the best sleep-focused competitors.

smartphone notifications
Product 1: Polar Grit X Pro
3.8

Notifications are useful and easy to read, but they remain basic and mostly read-only rather than interactive.

Product 2: Garmin Forerunner 570
3.5

Notifications work, but the experience is mixed. Some reviewers had smooth delivery, while others found text truncated or alerts too persistent on screen.

smartwatch features
Product 1: Polar Grit X Pro
3.9

Smartwatch features are decent and improving, but the watch is still clearly a sports-first device rather than a full smartwatch replacement.

Product 2: Garmin Forerunner 570
4.3

Smartwatch features are improved meaningfully with the added speaker, microphone, voice tools, and day-to-day conveniences, even if the watch still prioritizes sport over general smartwatch depth.

software smoothness
Product 1: Polar Grit X Pro
1.9

Laggy performance is a recurring complaint, affecting screen changes, button responses, and general smoothness.

Product 2: Garmin Forerunner 570
2.9

Software smoothness is generally strong, but not perfect. Some reviews call the experience polished, while others report crashes or temporary unresponsiveness in edge cases.

step counting accuracy
Product 1: Polar Grit X Pro
No score yet
Product 2: Garmin Forerunner 570
4.4

Step counting looked solid in direct testing, with one reviewer finding the watch was off by only around 40 steps in repeated checks.

stress tracking
Product 1: Polar Grit X Pro
No score yet
Product 2: Garmin Forerunner 570
4.2

Stress is part of the recovery picture rather than a headline feature, with one reviewer specifically noting that stress levels feed into the watch’s overall readiness guidance.

style and design
Product 1: Polar Grit X Pro
4.5

Style is a major selling point, with multiple reviewers calling it attractive, subtle, rugged, and easy to wear outside workouts.

Product 2: Garmin Forerunner 570
4.6

The design is widely liked. Reviewers highlight the brighter colors, more expressive styling, and a look that feels more refined than past Forerunners.

third-party app support
Product 1: Polar Grit X Pro
3.5

Third-party support is good enough for key fitness services like Komoot, Strava, and TrainingPeaks, but it is not especially broad or universal.

Product 2: Garmin Forerunner 570
4.5

Third-party service support is solid for a sports watch, with repeated mentions of Spotify, Deezer, Amazon Music, and YouTube Music support.

touchscreen responsiveness
Product 1: Polar Grit X Pro
1.7

Touch response is one of the clearest weak points, with repeated complaints about sluggish or frustrating responsiveness.

Product 2: Garmin Forerunner 570
4.5

Touch response is consistently described as responsive and easy to use, especially alongside the physical-button setup.

user interface
Product 1: Polar Grit X Pro
4.0

The interface is relatively simple and approachable, though simplicity does not fully make up for the watch’s slower feel.

Product 2: Garmin Forerunner 570
4.4

The interface is widely praised for feeling slicker, cleaner, more intuitive, and more modern than older Garmin implementations.

value for money
Product 1: Polar Grit X Pro
3.2

Build, recovery tools, and outdoor features help justify the price for the right buyer, but many reviewers still see the value as only fair unless it is discounted.

Product 2: Garmin Forerunner 570
2.7

Value for money is the main weakness. Most reviews say the watch is too expensive for what it adds over the 265, though a small number of owners still felt very happy with the purchase.

voice assistant quality
Product 1: Polar Grit X Pro
No score yet
Product 2: Garmin Forerunner 570
4.0

Voice features are mostly good for simple commands, timers, and phone-assistant access, though one reviewer reported crashes and awkward behavior with the phone assistant.

watch face quality
Product 1: Polar Grit X Pro
4.0

The watch faces and dashboards are useful, especially the outdoor-oriented ones, though some reviewers wanted more visual variety or flair.

Product 2: Garmin Forerunner 570
4.6

Watch-face customization is strong, with reviewers calling the default face clean and noting that layouts and displayed data can be tailored easily.

water resistance
Product 1: Polar Grit X Pro
4.8

WR100/100-meter water resistance is a clear positive and supports swimming and rough outdoor use.

Product 2: Garmin Forerunner 570
4.4

Water resistance is solid for swimming use. Reviews mention pool use, open-water suitability, and repeated use in lakes or the ocean without issue.

wellness insights
Product 1: Polar Grit X Pro
4.3

Nightly Recharge, sleep breakdowns, HRV, and related recovery metrics give the watch genuinely useful wellness context beyond raw workout logs.

Product 2: Garmin Forerunner 570
4.6

Wellness insights are a standout. Body Battery, Sleep Score, energy level, and broader readiness-style insights were repeatedly cited as genuinely useful.

workout tracking variety
Product 1: Polar Grit X Pro
4.6

Workout variety is excellent thanks to extensive sport profiles, multisport support, and strong options for customizing training use.

Product 2: Garmin Forerunner 570
4.8

Workout coverage is excellent. Reviewers repeatedly mention broad activity support, triathlon and multisport tools, and dozens of sport modes.