Polar Flow offers depth and web access, but the broader app ecosystem feels narrow because expansion and third-party tooling are limited.
One review describes Garmin’s wellness ecosystem as comprehensive, especially for turning health data into useful summaries.
The stock band is serviceable and often comfortable, but multiple reviewers complain that the buckle-and-loop setup is fiddly.
The silicone band is described positively for comfort and feel.
Battery life is respectable rather than class-leading, commonly landing around five to seven days depending on display mode and training load.
Battery life is widely praised, with most reviews citing around nine days and some testers stretching well beyond a week.
SpO2 support is a clear feature add across reviews, usually mentioned positively as part of the M3’s broader health sensor package.
Pulse Ox is present and generally viewed positively, with one reviewer calling the SpO2 readings spot-on.
Bluetooth support is consistently mentioned for sensor links, heart-rate broadcasting, and phone connectivity.
Brightness is a standout strength, with repeated praise for the 1,500-nit class output and easy readability.
One reviewer said the screen can be hard to read in very bright conditions, even at maximum brightness.
Build quality is solid for the price, but several reviewers note that the plastic-heavy construction softens the premium feel.
The move from a plastic case to a metal case is presented as a quality upgrade.
Physical controls are useful and often appreciated, though some reviewers wanted more tactile, less mushy buttons.
The new physical buttons are one of the most praised upgrades, especially for workouts and easier navigation.
Call handling is very limited, with reviewers explicitly noting that you cannot really take or manage calls from the wrist.
Calorie data is available, but one review said calories burned ran slightly off compared with another watch.
Charging is straightforward, but it relies on Polar’s proprietary cable rather than a more universal solution.
Charging is improved by the standard Garmin cable or simple magnetic setup, and reviewers call the new approach more convenient.
Charging speed gets positive marks, with reviewers describing it as quick enough or pleasantly painless.
Charging speed is good, with reviewers reporting roughly a full charge in about an hour.
Coaching and guidance features are a major plus, especially FitSpark, Training Load Pro, FuelWise, and workout suggestions tied to recovery.
Garmin Coach and structured workouts are widely praised for offering guided plans and flexible goal-based training.
Comfort is a strong point, with the light case and soft strap making it easy to wear for long stretches.
Comfort is a standout strength, with reviewers repeatedly saying the watch is light, easy to sleep in, and easy to forget on the wrist.
Polar Flow is a recurring weak point: detailed and capable, but dated, cluttered, and harder to navigate than it should be.
Garmin Connect gets mixed marks: reviewers praised setup and data usefulness, but one found the app less clear than it could be.
Contactless payments are not supported, which reviewers frequently call out as a missing convenience.
Garmin Pay is repeatedly noted as convenient and easy for on-the-go payments.
The watch supports both Android and iOS, so basic cross-platform use is not a concern.
One review explicitly says the watch works with both iOS and Android phones.
Customization is decent around watch faces and some on-watch visuals, but deeper workout-field flexibility is more limited than rivals.
Reviews note good customization for watch faces, widgets, data pages, training plans, and notifications, even if flexibility is not unlimited everywhere.
Display quality is excellent for the class, with reviewers repeatedly praising the AMOLED panel for sharpness, color, and overall visual appeal.
The hidden monochrome display earns praise for clarity and contrast, though it remains intentionally simple rather than rich or colorful.
Durability looks acceptable for normal use, but some reviewers remain wary of the plastic parts and the lack of a tougher premium build.
Durability impressions are mixed, with Gorilla Glass noted positively but aluminum scratch resistance called out as a weakness.
ECG is widely noted as included on the watch, but reviewers also point out that it is limited compared with more medical-style implementations.
Reviews explicitly note that the Lily 2 Active does not include ECG support.
Fit is generally praised, especially on smaller wrists, where the lighter and more compact body helps the watch sit well.
The compact size and lightweight build earn strong praise for smaller wrists and all-day wear.
General fitness tracking is viewed positively, with reviewers saying runs and core workout metrics usually painted an accurate overall picture.
General fitness tracking is reviewed very positively, with performance described as accurate and comparable to pricier Garmin models.
GPS is one of the M3’s strongest traits: most reviewers call it accurate or reliable, though some note small drifts in dense urban areas or tougher conditions.
GPS is a standout strength, with multiple reviews calling it accurate, fast to connect, and very close to higher-end Garmin devices.
Health tracking is generally viewed as useful and solid overall, though the strongest evidence is broader than lab-grade and sits alongside some sensor caveats.
Heart rate performance is mixed: several reviewers found it good enough or consistent in steady efforts, but interval, cycling, and some harder sessions produced clear misses.
Multiple reviews say heart-rate tracking was very solid or spot-on, with only minor lag during quick changes in effort.
There is no cellular or LTE-style independence here; the watch depends on the phone for fuller connected use.
Materials are a sensible mid-range mix of Gorilla Glass, steel accents, and plastic, giving decent quality without matching premium cases.
Materials get mixed feedback: Gorilla Glass and aluminum are appreciated, but one reviewer still viewed the aluminum as easier to scratch than pricier materials.
Menu navigation benefits from both touchscreen and buttons, and reviewers generally found it workable once learned.
Menus and widget navigation are generally viewed as straightforward, with swipes and buttons making the watch easier to move around.
Music controls work for phone playback and are seen as serviceable, but they are basic rather than rich.
Phone-based music controls work well for basic playback tasks like volume and track skipping.
Offline or onboard music storage is missing, and several reviewers treat that omission as a real tradeoff versus rivals.
Multiple reviews explicitly say there is no onboard music storage, so you still need your phone for music.
The operating system experience is functional but dated, with reviewers liking the focus but wanting a more modern feel.
Outdoor visibility is excellent, and multiple reviewers say the screen stays easy to read in bright sun.
One review specifically said the screen stayed readable outdoors, even in direct sunlight.
Pairing and setup are inconsistent across reviews: some found quick connection, while others hit slow, glitchy setup behavior.
Pairing is described as easy and dependable for phones and supported external sensors.
Recovery features are a standout, with Recovery Pro, Nightly Recharge, VO2 Max, orthostatic tests, and related tools repeatedly described as genuinely useful.
HRV, Body Battery, Training Readiness, and related guidance give useful signals about recovery and when to push or rest.
Overall reliability is good enough that reviewers generally trust the watch, even if a few quirks and edge-case misses remain.
One reviewer explicitly described the watch as very reliable during GPS use.
Incident detection, fall alerts, and emergency contact sharing are repeatedly mentioned as reassuring safety features.
Case sizing is limited because the watch comes in a single body size, though strap sizing is a bit more accommodating.
The one direct sleep-stage accuracy test was not flattering, with sleep tracking viewed as useful for general sleep monitoring but weak for precise staging.
Reviewers consistently said the watch nailed sleep and wake timing and caught wake-ups well, though one review still wanted deeper sleep-stage detail.
Phone notifications are present and useful for glanceable alerts, but they are basic and do not turn the watch into a full smart companion.
The watch reliably mirrors smartphone notifications, with support for calls, texts, and app alerts.
Smartwatch features are sparse overall: the M3 handles fitness far better than day-to-day smart tasks and feels limited beside broader rivals.
Core smartwatch basics are here, including notifications, music control, and Garmin Pay, but the feature set stays focused rather than expansive.
Day-to-day software performance is usually smooth and snappy, even though a few quirks still show up.
One review says day-to-day swiping and opening apps feels smooth.
Step counts lean high in multiple reviews, with repeated reports of overcounting versus other devices.
One reviewer found step counts close in casual testing, though arm-free walking can still miss steps.
Stress tracking is included across reviews and is described as useful for understanding energy and daily load.
Style is one of the M3’s wins: most reviewers call it attractive, mature, or more wearable day to day than many sports watches.
Style is one of the biggest selling points, with reviewers consistently praising the fashionable, minimalist look.
Third-party app support is a clear weakness, with repeated notes that there is no app store or meaningful way to extend the watch.
Reviews confirm syncing and compatibility with third-party services such as Strava, TrainingPeaks, and similar fitness platforms.
Touch response is generally quick and pleasant, with reviewers describing the screen as responsive and intuitive.
Touch input is the clearest weakness in the reviews, with repeated complaints about touches not registering cleanly.
The user interface is improved versus older Polar models but still draws criticism for awkward flows, small annoyances, and limited polish.
One reviewer describes the interface as very simple to swipe through and interact with.
Value is one of the clearest positives: reviewers repeatedly say the M3 packs strong training features, maps, and display quality for the money.
Value is mixed but mostly positive: several reviews say the added GPS and upgrades justify the price, while others think rivals offer more for similar money.
Voice assistant support is absent, and that lack is repeatedly framed as a notable smartwatch gap.
Watch face options are acceptable and improving, though opinions vary on how attractive or plentiful they feel today.
Watch face options get mixed feedback: the designs suit the look of the watch, but several reviewers wanted more variety or more color.
Water resistance is only middling for an adventure-leaning sports watch, with 50 meters seen as adequate rather than exceptional.
One review states the watch is water resistant to 5 ATM.
Wellness readouts like sleep quality, Boost from Sleep, and broader day-to-day guidance add helpful context beyond raw workout stats.
Body Battery, sleep scores, hormone guidance, and other wellness summaries are a major strength and frequently described as useful.
Workout coverage is broad, with 150-plus sport profiles and multisport support repeatedly highlighted as a strength.
Reviews repeatedly highlight the wide range of sport profiles and workout modes, with the Active adding many more than earlier Lily models.