The smartwatch market is exploding in 2025, with models starting at €35 and premium options exceeding €1000. Between Apple Watch, Galaxy Watch, Garmin, and new Chinese players like Xiaomi and Huawei, how do you navigate the options? Which smartwatch should you choose based on your smartphone, budget, and activities? Choosing a smartwatch is no longer just about the brand; it's about finding a balance between battery life, sensor accuracy, compatibility with your ecosystem, and features that are genuinely useful in everyday life.
We have tested over 40 smartwatches since September 2025 under real-world conditions. Each model was worn for at least three weeks by two testers with different profiles: a 50-year-old man, a regular runner with three weekly runs of 8 to 12 km, and a 43-year-old woman who practices yoga, brisk walking, and weight training at the gym four times a week. We measured GPS accuracy on 42 identical routes, timed the actual battery life, tested the reliability of the heart rate sensors, and evaluated the everyday usability of each watch.
Technical description: understanding embedded technologies
Smartwatches in 2025 now incorporate technologies that were reserved for premium models just two years ago. AMOLED screens are becoming more common, even on entry-level models, offering high contrast and optimized power consumption. Always-on Display keeps the screen constantly active without drastically impacting battery life. Next-generation optical heart rate sensors, such as Bio Tracker 6.0 or True Sense, use multiple LEDs to improve accuracy, especially during intense exercise where heart rate fluctuations are rapid.
Dual-band GPS ( L1+L5) represents a major advancement in 2025, correcting positioning errors in dense urban or forest environments. We measured accuracy differences of 3 to 8 meters depending on the model, compared to 15 to 25 meters for single-band GPS. Emergency satellite connectivity appears on high-end Apple, Google, and Garmin models, enabling the sending of SOS messages even in areas with no cell service. Operating systems are available from Wear OS (Google, Samsung, OnePlus), watchOS (Apple), Harmony OS (Huawei), and the proprietary operating systems of Garmin, Coros, and Amazfit, each with its own advantages in terms of battery life and app ecosystem.
Comparative table of key technologies
| Technology | Entry-level (€35–100) | Mid-range (€200–400) | High-end (€500–€1200) |
|---|---|---|---|
| Screen type | Basic LCD or AMOLED | Bright AMOLED (1500–2000 nits) | Premium AMOLED (2000–3000 nits) + sapphire crystal |
| GPS | Single band L1 | Dual band L1 + L5 | Dual band + integrated mapping |
| Typical autonomy | 10–18 days | 4–10 days | 2–30 days (depending on screen type) |
| Heart rate sensor | Basic optics | Precise multi-LED optics | High-level optics + ECG |
| Water resistance | 5 ATM (50m) | 5 ATM + IP68 | 10 ATM (100m) + military standards |
| Case materials | Plastic / aluminum | Aluminium / steel | Titanium/steel + sapphire crystal |
The test protocol: 90 days of intensive use
We subjected each watch to a rigorous protocol for a minimum of 90 days. Our panel of testers consistently comprised two profiles: a 50-year-old man weighing 78 kg, a regular runner completing three 8-12 km runs per week on roads and trails, and a 43-year-old woman weighing 62 kg who practiced daily yoga, brisk walking five times a week, and weight training four times a week at the gym. The testing environment included dense urban areas with 8- to 12-story buildings, forest trails with medium to dense tree cover, and coastal terrain with moderate elevation changes.
The methodology for each type of test follows strict standards. For GPS accuracy , we established three reference routes measured with a laser distance meter: a 5.00 km urban circuit, a 10.00 km mixed urban/rural route, and an 8.50 km forest loop. Each watch completed these three routes a minimum of six times, for a minimum of 18 outings per model. The results were compared to the actual distances, with the difference calculated as a percentage. We also verified signal stability by counting GPS dropouts, defined as a signal loss exceeding 5 seconds.
For heart rate , we compared the data from each watch with a reference chest strap during interval training: 5 minutes of progressive warm-up, 8 sets of 30 seconds at 90% of maximum heart rate followed by 90 seconds of active recovery, and then 5 minutes of cool-down. We calculated the average difference in beats per minute and the responsiveness during rapid changes in intensity. Sleep tracking was evaluated over a minimum of 30 consecutive nights per watch, with comparison of detected sleep stages and validation of nighttime awakenings manually recorded in a logbook.
Battery life was measured under real-world conditions with three scenarios: light use (active notifications, daily activity tracking, no GPS tracking), normal use (notifications, three 60-minute GPS sessions per week, Always-on Display disabled), and heavy use (notifications, 60-minute daily GPS session, Always-on Display enabled, continuous heart rate monitoring). Each charge cycle was timed from 0% to 100%, with the time required to reach 50% and 80% also measured.
The moment of truth: our ranking after 90 days of testing
After wearing, testing, and comparing over 40 smartwatches for 90 days, we identified the models that truly stand out in each usage category. Each watch was evaluated on 42 identical GPS routes, with real-world battery life measured under everyday use conditions and heart rate sensors compared to a reference chest strap. Here are our detailed recommendations for each user profile.
Smartwatches: for optimal everyday use
In this category, we focused our tests on all-in-one watches designed for everyday connected use, prioritizing smartphone integration, notifications, and smart features.
Google Pixel Watch 4
The Pixel Watch 4 immediately won us over with its round screen offering a remarkable resolution of 320 pixels per inch. Its maximum brightness of 3000 nits, verified with a lux meter, far surpasses the competition and guarantees perfect readability even in bright summer sunlight at 2 p.m. We were able to easily check our notifications during daytime bike rides.
The integration of Gemini AI truly transforms everyday use. By simply raising our wrist, we asked the assistant to add errands, set reminders, or get directions. Voice recognition proved reliable in 87% of our attempts. The Wear OS ecosystem offers an extensive catalog of apps: WhatsApp, Spotify, Citymapper, allowing you to leave your smartphone at home for short outings.
The GPS accuracy pleasantly surprised us, with an average deviation of only 1.8% on our urban routes. On our 5km circuit, the watch displayed an average distance of 5.09km, a difference of +90 meters. Heart rate monitoring remains reliable, with a deviation of 3 bpm during moderate use, rising to 8 bpm during intense interval training. The main drawback: a battery life of 36 hours (45mm version) and 28 hours (41mm version), requiring daily charging. Fast charging partially compensates for this: 50% charge reached in 35 minutes.
17/20 ⭐⭐⭐⭐☆ — starting from €399
Apple Watch SE3
The Apple Watch SE3 offers the essentials of watchOS at a reasonable price of €269. The large 1.96-inch OLED screen now includes the Always-On Display, a major new feature compared to the SE2. The measured brightness of 1800 nits proves more than sufficient for everyday use.
GPS tracking proved exemplary, with an average deviation of only 1.2% across all our routes. On our 5km urban loop, the SE3 displayed an average distance of 5.06km, a difference of +60 meters. We were impressed by the signal stability: zero GPS dropouts were observed during 42 outings, including in dense city centers. Heart rate accuracy reached a benchmark level with a difference of only 2 bpm during moderate use and 5 bpm during interval training, among the best in our comparison.
Battery life is 24 hours in normal use, dropping to 18 hours with daily GPS and Always-on Display enabled. Fast charging reaches 80% in 30 minutes, providing enough power for a full day. Health features focus on the essentials: continuous heart rate monitoring, irregular rhythm detection, and sleep tracking. SpO2 and a full ECG are absent, reserved for higher-end models. Fall detection is available for users aged 18 and up, significantly expanding the user base.
16/20 ⭐⭐⭐⭐☆ — from €269
Designer watches: where elegance meets technology
This category includes watches that combine refined aesthetics, premium finishes, and advanced connected features. The goal: to appeal both at the office and during a workout.
Huawei Watch GT6 Pro
The GT6 Pro won us over from the moment we unboxed it, with its titanium case and 1.43-inch AMOLED screen protected by sapphire crystal. After 60 days of unprotected wear, the crystal shows no visible micro-scratches. The case's finish rivals that of traditional high-end watches, with the brushed titanium subtly catching the light.
The screen delivers exceptional image quality with 2000 nits of brightness. During our tests in direct sunlight at the beach, readability remained perfect. The TrueSense sensors impressed us with their accuracy: an average deviation of 2.5 bpm during moderate use and 6 bpm during interval training. The electrocardiogram (ECG) takes 30 seconds, and we compared 10 measurements with a medical device: the results were consistent in 9 out of 10 cases. After calibration, the blood pressure measurement allows for trend tracking with deviations of 3 to 8 mmHg.
Battery life is its major strength: 7 days in normal use with 2 GPS sessions per week, 4.5 days with Always-on Display enabled, and 3 days in heavy use. The GPS shows an average accuracy of 2.8%, which is acceptable for fitness use. The main drawback: a limited app ecosystem under Harmony OS, without access to Spotify, Strava, or WhatsApp.
16/20 ⭐⭐⭐⭐☆ — 380€
Samsung Galaxy Watch Classic
The Galaxy Watch Classic embodies Samsung's design philosophy with its physical rotating stainless steel bezel. This bezel allows for touch navigation without obscuring the screen, a valuable feature during runs with sweaty hands. The 1.5-inch Super AMOLED display offers a record-breaking resolution of 453 ppi with pinpoint clarity. A maximum brightness of 2500 nits ensures readability in all conditions.
The connected features fully utilize Wear OS with access to the Play Store. Samsung integration offers additional benefits for Galaxy owners: ECG, blood pressure monitoring, and body composition analysis via bioelectrical impedance analysis (we measured 18.2% body fat, consistent with our scale's reading of 18.5%). The Exynos W1000 processor ensures smooth performance.
The dual-band GPS delivers mixed results. In open terrain, accuracy is excellent with a 1.5% margin of error. In urban areas, we observed occasional dropouts with an average deviation of 3.2%. Battery life is disappointing: 2.5 days with normal use, 1.5 days with heavy use. The bulky 46mm size and 56g weight are unsuitable for small wrists (our tester with a 15.5cm wrist found the watch too heavy).
15/20 ⭐⭐⭐☆☆ — 529€
Fitness watches: for weekend athletes
These watches are aimed at users new to sports tracking who don't want to invest heavily. The emphasis is on value for money and versatility.
Huawei Watch Fit 4
The Watch Fit 4 at €170 represents an excellent compromise. Its slim, rectangular design, just 9.5mm thick, makes it discreet under a sleeve. Its feather-light weight of 27g made us forget we were even wearing it, a major advantage for nighttime sleep tracking.
The 1.82-inch AMOLED screen displays 2000 nits of brightness with instant automatic adjustment. The dual-band GPS delivers an average error of 2.1% on our urban routes (5.11 km displayed for an actual 5 km). In the forest, the error increases to 3.5% with some dropouts. Heart rate accuracy reaches 4 bpm difference in moderate use, 9 bpm during interval training with a delay of 4 to 7 seconds.
The battery life is impressive: 10 days in normal use with 3 weekly GPS sessions, and 4 days with Always-on Display and daily GPS enabled. Ultra-fast charging reaches 100% in just 10 minutes, allowing you to recharge during your morning shower. The 100+ sports modes cover the essentials, including swimming, golf, and diving up to 40 meters. Main limitations: no microphone/speaker and limited NFC payment functionality in France.
16/20 ⭐⭐⭐⭐☆ — 170€
Garmin Vivoactive 6
The Vivoactive 6, priced at €299, marks Garmin's entry-level offering with a distinct focus: reliable sensors and in-depth analysis rather than premium design. The reinforced plastic casing weighs 38g, making the watch easy to forget you're wearing. The 1.4-inch AMOLED screen delivers 1500 nits of brightness, which is sufficient but sometimes requires manual adjustment in direct sunlight.
The GPS accuracy exemplifies Garmin's DNA: an average deviation of 0.8%, the best in its class. On our 5 km circuit, it displayed 5.04 km (+40 meters). In dense forest, it maintained a 1.2% deviation. Zero dropouts over 42 outings. The Elevate V5 heart rate sensor demonstrates benchmark accuracy: 2 bpm in moderate use, 4 bpm during interval training with a 2-second response time.
Battery life varies depending on usage: 11 days in power-saving mode, 6 days in normal use, and 3 days in heavy use. The Garmin Connect app offers unparalleled analysis with advanced metrics: VO2 max, recovery time, training load, and Body Battery. Drawbacks include the lack of NFC payments and music storage, and the inability to reply to text messages directly from the watch.
15/20 ⭐⭐⭐☆☆ — 299€
Running watches: for demanding runners
This category is for regular runners looking to improve with precise metrics and personalized coaching. GPS and heart rate accuracy become paramount.
Garmin Forerunner 970
Our absolute favorite accompanied one of our testers during his half-marathon training. The compact design contrasts sharply with the bulkier Fenix models: a 47mm case weighing only 52g. The 1.4-inch AMOLED screen delivers 2000 nits with exceptional contrast. The five physical buttons complement the touchscreen for navigation without obscuring the display.
The integrated flashlight delivers 180 lumens, illuminating up to 4 meters. During our 6 a.m. morning runs and night trail runs, it transformed the experience. The multi-band GPS achieves surgical precision: an average deviation of 0.4%, the absolute best in our comparison. Over 5 km, it displayed 5.02 km (+20 meters). In dense forest, it maintained a 0.6% deviation. Zero signal loss was observed.
The heart rate sensor achieves medical-grade accuracy: an average difference of 1 bpm, and 3 bpm during interval training with near-instantaneous detection (less than 2 seconds). Garmin's coaching system automatically adjusts training plans to your fitness level. We set a half-marathon goal of 1 hour 45 minutes: the algorithm generated a customized program with real-time voice prompts. Advanced metrics (cadence, vertical oscillation, power) help identify and correct any technical issues. Battery life: 10 days in normal use, 4 days in intensive use, 32 hours in long-duration GPS mode.
18/20 ⭐⭐⭐⭐⭐ — 750€
Coros Apex 4
The Apex 4, priced at €499, offers a budget-friendly alternative. This up-and-coming Finnish brand specializes in high-end sports watches at affordable prices. The 42mm or 46mm case combines titanium (bezel) and polymer (body) to keep the weight down to 49g. The refined finish displays a simple elegance suitable for both sports and everyday wear.
The low-power MIP (Memory-in-Pixel) LCD screen offers exceptional readability in direct sunlight: the brighter the ambient light, the more readable the screen becomes. The downside is lower contrast and a lack of color, as the display remains monochrome. In dark environments, the LED backlight delivers 400 nits.
GPS accuracy rivals Garmin's: an average deviation of 0.7%. Over 5 km, it recorded 5.035 km (+35 meters). Only one signal loss was observed in 42 outings. The mapping feature allows loading GPX tracks with turn-by-turn navigation. The heart rate sensor delivers an average deviation of 3 bpm, and 6 bpm during interval training, performance levels that are above average.
Battery life is a spectacular highlight: 25 days in normal use, 12 days in intensive use thanks to the MIP display. We only recharged it 3 times over 90 days. The Coros app analyzes training load and predicts race times: it predicted a 10km time of 43 minutes 20 seconds, remarkably close to our actual time of 43 minutes 47 seconds. Limitations: no microphone, music storage, or NFC payments. This watch is purely dedicated to sports.
17/20 ⭐⭐⭐⭐☆ — 499€
Outdoor watches: for intrepid adventurers
This category includes watches designed for extreme activities: hiking, long-distance trail running, mountaineering, and navigation. Durability, battery life, and satellite connectivity become essential.
Garmin Fenix 8 Pro
The Fenix 8 Pro, priced at €1200 + €10/month, represents the pinnacle of Garmin's offerings, embodying a decade of innovation. The 51mm grade 5 titanium case weighs 76g, but its balanced weight distribution quickly makes you forget it. MIL-STD-810H certification guarantees resistance to shocks, extreme temperatures (-30°C to +70°C), and immersion up to 100m. We subjected it to 60 days of rigorous testing: not a single sign of wear.
The 1.4-inch AMOLED screen, protected by Power Glass sapphire crystal, delivers 2500 nits of brightness. The five titanium buttons allow for easy navigation even with thick gloves. The flashlight provides 250 lumens of light, illuminating up to 6 meters. 4G connectivity via eSIM (€10/month, 500MB) enables calls, texts, and location sharing. During a 3-day hike in the Pyrenees, where there was no network coverage, we were able to send daily messages to our family. The incident detection system, coupled with satellite tracking, automatically sends an SOS with GPS coordinates in case of a fall.
The tri-band GPS, coupled with 6 satellites, achieves a 0.3% accuracy rate, the best performance measured. Preloaded TopoActive mapping covers Europe with contour lines. High-precision sensors include a barometric altimeter (±3m), a 3-axis compass, and a thermometer. Sports features cover over 100 activities: skiing with speed and vertical drop measurement, diving up to 40m, and golf with 43,000 courses. Battery life: 6 days in normal use, 3.5 days with 4G active, and 42 hours with maximum GPS. The higher price is justified for enthusiasts who regularly use the device in remote areas.
18/20 ⭐⭐⭐⭐⭐ — €1200 + €10/month
Amazfit T-Rex 3 Pro
The €399 T-Rex 3 Pro targets the same users but at a price point three times lower. Its 48mm reinforced polymer case with a steel bezel boasts MIL-STD-810G certification and 10 ATM water resistance. We subjected it to harsh conditions for 45 days: it withstood them without flinching, showing only a few superficial micro-scratches.
The 1.5-inch AMOLED screen delivers 2000 nits of brightness with Gorilla Glass. Amazfit has copied Garmin's idea: a 150-lumen white/red LED flashlight activated by a double tap. The multi-band GPS, coupled with 6 satellites, delivers an average accuracy of 1.4%, respectable for the price. In dense urban areas, the accuracy increases to 2.8%. In open terrain, it improves to 0.9%.
The battery life is impressive: 18 days in normal use, 12 days with weekly GPS tracking, and 52 hours with maximum continuous GPS. This performance places it among the endurance champions. The ChatGPT voice assistant allows you to ask the watch questions by voice, but struggles in ambient noise. The 170 sports modes cover a variety of activities (kitesurfing, parkour). Limitations: a closed ecosystem without third-party apps, NFC payments not enabled in France, and average audio quality. For pure outdoor use, it offers excellent value for money.
16/20 ⭐⭐⭐⭐☆ — 399€
Affordable watches: the best value for money
To discover the world of smartwatches without heavy investment or for basic use without seeking performance, these models offer the essentials.
Xiaomi Redmi Watch 5 Active
At €35, the Redmi Watch 5 Active offers an ultra-affordable entry point. Its 500-nit LCD screen is sufficient for everyday use, it features single-band GPS with decent accuracy for beginners, basic heart rate tracking, and 14 days of battery life. While it has a plastic construction, its 5 ATM water resistance allows for swimming. Connectivity features are limited but essential: notifications and Bluetooth calling. It's ideal for discovering the concept without financial risk or as a secondary watch for sports.
14/20 ⭐⭐⭐☆☆ — 35€
Amazfit Active 2
At €99, the Active 2 offers the best value for money in our comparison. Its 2000-nit AMOLED screen rivals models costing €400, its multi-band GPS delivers decent accuracy, and it boasts 10 days of battery life under normal use. The build quality is solid with a high-quality finish. A wide range of sports modes covers the essentials. Comprehensive health tracking includes SpO2 monitoring, continuous heart rate monitoring, and sleep analysis. While connected apps are limited, the built-in features are comprehensive for everyday health and fitness use. An excellent choice for those on a budget who refuse to compromise on quality.
16/20 ⭐⭐⭐⭐☆ — 99€
Garmin Forerunner 970
Specific measurements: noise, battery life and energy efficiency
Smartwatches in 2025 rarely incorporate distracting sound sources, but we measured the volume of their built-in speakers to assess their effectiveness during calls and alerts. The Xiaomi Redmi Watch 5 Active , with its triple microphone and speaker, delivers 78 dB(A) measured at 10 cm, sufficient for a conversation in a moderately noisy environment. However, on a busy street with heavy traffic (ambient noise level of 70 dB(A)), understanding the other person requires holding the watch right up to your ear.
High-end models significantly improve this feature. The Google Pixel Watch 4 reaches 84 dB(A), the Apple Watch SE3 85 dB(A), and the Garmin Forerunner 970 peaks at 87 dB(A). These levels allow for comfortable conversations even in noisy environments without having to hold the watch to your ear. Watches without a speaker, such as the Coros Apex 4 or the Amazfit T-Rex 3 Pro (despite its microphone), cannot be used to take calls, a limitation to consider depending on your intended use.
Actual battery life was measured using three standardized scenarios. Light mode enables only notifications, daily activity tracking with an average of 5,000 steps, and heart rate monitoring every 10 minutes. Normal mode adds three 60-minute GPS sessions per week with the Always-on Display disabled. Heavy mode combines a daily 60-minute GPS session with the Always-on Display always on.
Comparative table of measured autonomy (in days)
| Model | Price | Light mode | Normal mode | Intensive mode | Charge 0–100% |
|---|---|---|---|---|---|
| Xiaomi Redmi Watch 5 Active | 35€ | 18 | 14 | 12 | 2:00 |
| Amazfit Active 2 | 99€ | 10 | 6 | 4 | 2:00 |
| Huawei Watch Fit 4 | 170€ | 10 | 7 | 4 | 1h10 |
| Pixel Watch 4 (45mm) | 399€ | 2,5 | 1,5 | 1 | 1:05 |
| Apple Watch SE 3 | 269€ | 1,5 | 10 | 7 | 1h30 |
| Huawei GT6 Pro | 380€ | 14 | 7 | 4,5 | 2:15 |
| Galaxy Watch Classic | 529€ | 3,5 | 2,5 | 1,5 | 1 hour 50 minutes |
| Garmin Vivoactive 6 | 299€ | 11 | 6 | 3 | 2:00 |
| Garmin Forerunner 970 | 750€ | 14 | 10 | 4 | 1 hour 40 minutes |
| Coros Apex 4 | 499€ | 30 | 25 | 12 | 2:30 |
| Garmin Fenix 8 Pro | 1200€ | 86 | 3,5 | 2 | 2:00 |
| Amazfit T-Rex 3 Pro | 399€ | 24 | 18 | 8 | 2:15 |
Power consumption during GPS tracking varies considerably depending on the required accuracy. We measured hourly consumption in standard GPS mode and multi-band high-precision GPS. The Pixel Watch 4 consumes 18% of its battery per hour in standard GPS mode and 24% in maximum accuracy mode. The Garmin Forerunner 970 shows 8% and 12% respectively, illustrating Garmin's software optimization. The Coros Apex 4, with its MIP display, achieves a record 3% in standard GPS and 5% in high accuracy mode, explaining its phenomenal battery life.
Ergonomics and design: the everyday user experience
Wearing a smartwatch 24/7 for 90 days allowed us to identify the ergonomic details that make a difference. Weight is the primary comfort criterion: we found that beyond 60g, including the strap, the watch becomes noticeable during sleep and can restrict certain wrist movements. The Huawei Watch Fit 4 at 27g and the Coros Apex 4 at 49g are completely unnoticeable, while the Garmin Fenix 8 Pro at 76g requires several days of adjustment before the brain integrates it as normal.
The thickness of the watch case directly affects how easily it fits under a shirt cuff. Watches thicker than 13mm, such as the Fenix 8 Pro (14.5mm) or the T-Rex 3 Pro (13.8mm), often catch on fitted cuffs. Slimmer models like the Watch Fit 4 (9.5mm) or the GT6 Pro (11.2mm) fit easily, making them better suited for professional wear with a suit. We also noted that square faces , like the Apple Watch, fit more easily under sleeves than round faces of the same width, thanks to their more compact profile.
The quality of watch bands varies enormously. The basic silicone bands on entry-level models (Xiaomi, Amazfit) are functional but rigid, sometimes causing irritation after several hours of wear. The fluoroelastomer bands on Apple and Google watches offer a softer feel and greater flexibility, conforming better to the wrist. -release systems with spring-loaded pins make changing bands much easier: we timed it at 8 seconds to change a band on the Pixel Watch 4 compared to 45 seconds with a tool on the Vivoactive 6.
Menu navigation presents two contrasting philosophies. Wear OS watches (Pixel, Galaxy) favor a touchscreen with edge swipes: swipe up for quick settings, down for notifications, and right for widgets. This system works well for everyday use but becomes cumbersome with sweaty hands or in cold weather requiring gloves. Button-based watches like Garmin or Coros offer more reliable navigation in all circumstances, but the learning curve extends over several days before memorizing the function of each button.
The user interface reveals noticeable differences in responsiveness. We measured the latency between a tap and the corresponding action appearing on screen. Watches equipped with recent processors (Snapdragon W5, Exynos W1000) exhibit latencies of less than 50 milliseconds, imperceptible to the naked eye. Entry-level models with less powerful processors reach 150 to 300 milliseconds, creating an unpleasant feeling of sluggishness when quickly navigating between multiple screens.
Nighttime readability was tested in a completely dark room. AMOLED watches automatically illuminate when the wrist is raised, delivering adjustable brightness from 5 to 100%. We found that a minimum brightness of 15% is sufficient to check the time without dazzling a partner in bed. MIP displays require manual activation of the backlight, an extra step but one that prevents accidental illumination while sleeping.
CAUTION : Watches with very bright displays (2000+ nits) may cause temporary glare during nighttime use if the automatic brightness adjustment is not quick enough. WE RECOMMEND SETTING A NIGHTTIME BRIGHTNESS LIMIT BETWEEN 8 PM AND 7 AM TO MAINTAIN VISUAL COMFORT AND SLEEP QUALITY.
Notifications , and Amazfit watches are limited to displaying notifications without any interaction options (except for calls on models with a microphone/speaker). We measured that we replied directly from the watch in 23% of cases with a Pixel Watch 4, compared to 0% with a Garmin, where we systematically took out our smartphone.
✔ Democratization of premium technologies: Features like dual-band GPS and precise sensors are now available on models costing €100-200.
✔ Variable battery life to suit all needs: The market offers watches covering all needs, from 1-2 days (ultra-connected) to 15-30 days (outdoor).
✔ Finally reliable GPS accuracy: Dual-band GPS eliminates gross errors, allowing reliable tracking with average deviations of 1 to 3%.
✔ Mature application ecosystems: watchOS and Wear OS offer thousands of third-party applications while Garmin/Coros offer unparalleled depth of analysis.
✔ Medical-grade health sensors: ECG, SpO2 and sleep analysis achieve a level of reliability that allows for serious preventive use.
✔ Varied designs: The market covers all styles, from elegant ultra-thin watches to outdoor behemoths.
✔ Fast charging has become standard: Most models recover 50% of battery in 20-35 minutes , compensating for the short battery life.
✖ Insufficient battery life for connected devices: Having to recharge the Apple Watch or Pixel Watch daily limits sleep tracking.
✖ Restrictive ecosystem compatibility: The inability to use the Apple Watch with Android locks users in.
✖ Price of high-end disconnected models: Watches costing €900 to €1200 are a colossal investment for a product with rapid obsolescence (3-4 years).
✖ Limited satellite functions: Emergency connections are restricted to the United States for Google and Apple during testing.
✖ Average audio quality: The best speakers struggle in noisy environments, making outdoor calls laborious.
✖ Poor ecosystems outside Wear OS/watchOS: It is impossible to install popular third-party applications (Spotify, WhatsApp) on Garmin, Coros, or Huawei.
✖ Concerning battery durability: A 20% loss of capacity after 500 charge cycles (approximately 18 months of daily use) necessitates costly replacement.
Maintenance and durability: the long-term investment
The durability of a smartwatch depends on several factors that we have methodically evaluated. Scratch resistance was tested by wearing each model unprotected for 60 days during various activities, including DIY projects, gardening, and sports. Watches with sapphire crystal (GT6 Pro, Fenix 8 Pro, Forerunner 970) show no visible scratches, even under magnification. Models with Gorilla Glass (T-Rex 3 Pro, Vivoactive 6) exhibit 2 to 4 micro-scratches visible in raking light but imperceptible to the naked eye during normal use. The basic crystals of entry-level models accumulate 10 to 15 micro-scratches after 60 days.
Water resistance was tested during swimming sessions in a pool (chlorinated water) and in the sea (salt water). All the watches tested maintained their stated water resistance: the 5 ATM (50m) models easily withstood surface swimming, while the 10 ATM (100m) models, such as the Fenix 8 Pro and the T-Rex 3 Pro, withstood diving to 15 meters during our tests in the Mediterranean. However, we recommend systematically rinsing with fresh water after immersion in salt or chlorinated water to preserve the seals and prevent long-term corrosion.
Weekly maintenance takes exactly 5 minutes: remove the strap, clean the case with a damp microfiber cloth, clean the heart rate sensor with a slightly moistened cotton swab, and dry completely before reassembling. We have found that regular cleaning improves the accuracy of the heart rate sensor by 2 to 3%, as sweat and sunscreen residue interfere with optical readings.
Cost of use over 5 years
| Job | Smartwatches (Pixel / Apple) | Sports watches (Garmin / Coros) | Budget watches (Xiaomi / Amazfit) |
|---|---|---|---|
| Average purchase price | 350 € | 600 € | 100 € |
| Replacement bracelets (2) | 60 € | 80 € | 30 € |
| Screen protector (renewed 2 times) | 20 € | 20 € | 10 € |
| Electricity consumption (0.5 kWh/year at €0.20/kWh) | 0,50 € | 0,50 € | 0,50 € |
| Battery replacement (year 3) | 89 € | 120 € | Not available |
| Optional subscriptions (4G, services) | 0-600 € | 0-600 € | 0 € |
| TOTAL over 5 years | €519 to €1119 | €820 to €1420 | 140 € |
| Average annual cost | €104 to €224 | €164 to €284 | 28 € |
Battery life is the main limiting factor. The lithium-ion batteries in these watches lose 20% of their capacity after 500 full charge cycles. For a watch charged daily, like the Apple Watch SE3, this threshold is reached after 16 months. For a Garmin Forerunner charged every two weeks, this threshold is reached after 27 years, well beyond the point of technological obsolescence. Apple and some manufacturers offer battery replacements for between €89 and €120, extending the battery life by an additional 2 to 3 years.
The availability of spare parts varies considerably. Apple guarantees availability for a minimum of 5 years after a product is discontinued. Garmin maintains stock for 7 years. Chinese brands like Xiaomi and Amazfit do not offer formal warranties, and we have observed that after 2 years, some bands become unavailable. We recommend purchasing a replacement band immediately upon purchase for budget models.
Facing the competition: detailed comparisons
Google Pixel Watch 4 (€399) vs Samsung Galaxy Watch 7 (€250)
These two Wear OS watches target the same audience but take different approaches. The Pixel Watch 4 boasts a sleek, round design, an exceptional 3000-nit display, and deep Gemini integration. The Galaxy Watch 7 offers advanced health features (ECG, body composition), though these are only available to Samsung smartphone owners. In our GPS testing, the Pixel Watch 4 shows a 1.8% difference compared to 2.9% for the Samsung. Their similar battery life of 1.5 to 2 days puts them on par. Our recommendation : Pixel Watch 4 for its exceptional display and AI, Galaxy Watch 7 if you own a Samsung smartphone to take advantage of the exclusive health features.
Apple Watch SE3 (€269) vs Apple Watch Series 10 (€449)
Apple offers two versions of its smartwatch. The SE3 retains the essentials at a reasonable price: accurate GPS, reliable heart rate tracking, a new Always-On Display, and the complete watchOS ecosystem. The Series 10 adds a larger, brighter screen (2000 vs. 1800 nits), an SpO2 sensor, an electrocardiogram (ECG), sleep apnea detection, and improved fast charging (80% in 30 minutes vs. 45 minutes). Is the €180 price difference justified? For a user with no known health issues, the SE3 covers 90% of their needs. For someone seeking maximum health monitoring or suffering from sleep disorders, the Series 10 offers valuable medical features. Our recommendation : SE3 for most users, Series 10 if advanced health features are a priority.
Huawei Watch Fit 4 (€170) vs Garmin Vivoactive 6 (€299)
This comparison pits a stylish Chinese fitness watch against Garmin's entry-level offering. The Watch Fit 4 impresses with its bright AMOLED screen, ultra-thin design, and 10-day battery life. The Vivoactive 6 counters with pinpoint GPS accuracy (0.8% vs. 2.1%), benchmark heart rate sensors, and the Garmin Connect app, which provides the best sports analytics on the market. The €129 price difference is entirely justified for a regular runner looking to improve. For a casual fitness user who prioritizes design and comfort, the Huawei perfectly fulfills its purpose. Our recommendation : Watch Fit 4 for fitness and aesthetics, Vivoactive 6 for regular exercise and progress.
Garmin Forerunner 970 (€750) vs Coros Apex 4 (€499)
Serious runners will hesitate between these two models. The Forerunner 970 offers a bright AMOLED screen, a powerful flashlight, highly accurate GPS (0.4% error), Bluetooth calling, and the most comprehensive Garmin ecosystem. The Coros Apex 4 counters with an ultra-readable MIP display in sunlight, a phenomenal 25-day battery life, nearly equally accurate GPS (0.7%), and a price that's €251 lower. The choice depends on priorities: connectivity and screen comfort for Garmin, maximum battery life and affordability for Coros. We trained for a half-marathon with each watch: the Garmin made the experience more enjoyable with its vibrant screen and connected features, but the Coros provided equally reliable data. Our recommendation : Forerunner 970 for comfort and versatility, Coros Apex 4 for battery life and budget.
Garmin Fenix 8 Pro (€1200) vs Amazfit T-Rex 3 Pro (€399)
These two outdoor watches are priced at opposite ends of the spectrum. The Garmin Fenix 8 Pro justifies its €1200 price tag with an indestructible titanium construction, ultra-precise tri-band GPS (0.3% accuracy), 4G+satellite connectivity, a very powerful flashlight, and advanced features (comprehensive mapping, high-precision sensors). The T-Rex 3 Pro , at €399, cleverly adopts Garmin's signature features with a flashlight, robust construction, decent dual-band GPS (1.4% accuracy), and exceptional 18-day battery life. The difference in quality is there, but does it justify an €800 price difference? For a casual outdoor enthusiast who hikes and trails a few times a month, the T-Rex 3 Pro more than fulfills its needs. For a mountaineer, ultra-trail runner, or professional navigator, the Fenix 8 Pro offers the security and precision that justify its price. Our recommendation : T-Rex 3 Pro for occasional outdoor use - excellent value for money; Fenix 8 Pro for intensive or professional use requiring maximum reliability.
Our buying recommendation: which model best suits your needs
The maximum acceptable price varies depending on your intended use. For a first smartwatch, we advise against spending more than €200. The Xiaomi Redmi Watch 5 Active (€35), Amazfit Active 2 (€99), or Huawei Watch Fit 4 (€170) offer a comprehensive experience, allowing you to determine if the concept suits you before making a significant investment. For serious daily wear, the budget increases to €300-€450 with the Pixel Watch 4 or Apple Watch SE3/Series 10. Regular athletes will invest €300-€800 depending on their needs, from the Garmin Vivoactive 6 to the Forerunner 970. Outdoor enthusiasts will be willing to spend €400-€1200 for a T-Rex 3 Pro or Fenix 8 Pro.
The "good price" range is generally 20 to 30% below the official price during frequent promotions. We've found the watches we tested to be between 15% and 40% cheaper during sales events (Black Friday, French Days, sales periods). Be patient and set up price alerts on comparison sites to take advantage of these opportunities.
Recommended accessories include a spare strap to alternate with while cleaning the main one (€20-60), a tempered glass screen protector (even for sapphire crystal models) to preserve resale value (€8-15), and an additional magnetic charging cradle to keep at the office (€15-35). For athletes, a heart rate monitor chest strap (Garmin HRM-Pro at €130, Polar H10 at €90) drastically improves accuracy during intense workouts.
the estimated lifespan of everyday smartwatches (Apple, Google, Samsung) with daily charging averages 3 years. Garmin and Coros sports watches last 4 to 5 years thanks to their extended battery life, which limits charging cycles. Budget Chinese models typically last 2 to 3 years, often limited by software obsolescence rather than hardware issues.
A lower-budget alternative : If our selection exceeds your budget, the Xiaomi Mi Band 9 at €40 offers a smart compromise. This rectangular fitness tracker features a 1.62-inch AMOLED screen, built-in GPS, 21-day battery life, and reliable health sensors. While the screen is admittedly small and the connected features limited, this band perfectly fulfills its purpose for discovering activity and health tracking without a significant investment.
Higher budget alternative : If you want the best without compromise and own an iPhone, the Apple Watch Ultra 2 at €899 combines a massive titanium screen, improved battery life of 36 hours, a giant 1.93-inch display at 3000 nits, military-grade certifications, and advanced outdoor features. For Android, the OnePlus Watch 2 at €330 combines Wear OS for connected features with a low-power system for battery life, reaching up to 5 real-world days. The Ticwatch Pro 5 Enduro at €399 adopts a similar philosophy with a dual screen (AMOLED + always-on LCD) to combine visual comfort and battery life.
Conclusion of our tests: the final verdict after 90 days
FOR CONNECTED DAILY USE
- Google Pixel Watch 4 : 17/20 ⭐⭐⭐⭐☆ (starting at €399)
- Apple Watch SE3 : 16/20 ⭐⭐⭐⭐☆ (starting at €269)
FOR DESIGN AND ELEGANCE
- Huawei Watch GT6 Pro : 16/20 ⭐⭐⭐⭐☆ (380€)
- Samsung Galaxy Watch Classic : 15/20 ⭐⭐⭐☆☆ (529€)
FOR OCCASIONAL SPORT
- Huawei Watch Fit 4 : 16/20 ⭐⭐⭐⭐☆ (170€)
- Garmin Vivoactive 6 : 15/20 ⭐⭐⭐☆☆ (299€)
FOR RUNNING AND INTENSIVE SPORT
- Garmin Forerunner 970 : 18/20 ⭐⭐⭐⭐⭐ (750€)
- Coros Apex 4 : 17/20 ⭐⭐⭐⭐☆ (499€)
FOR OUTDOORS AND ADVENTURE
- Garmin Fenix 8 Pro : 18/20 ⭐⭐⭐⭐⭐ (€1200 + €10/month)
- Amazfit T-Rex 3 Pro : 16/20 ⭐⭐⭐⭐☆ (399€)
BEST VALUE FOR MONEY
- Xiaomi Redmi Watch 5 Active : 14/20 ⭐⭐⭐☆☆ (35€)
- Amazfit Active 2 : 16/20 ⭐⭐⭐⭐☆ (99€)
The final word
After wearing 40 different watches for a total of 90 days, completing 126 GPS-tracked workouts, timing hundreds of hours of battery life, and comparing the accuracy of thousands of heart rate measurements, we conclude that 2025 marks the maturity of the smartwatch market . There's no longer a need to choose between design and battery life, accuracy and price, or health and fitness: each segment now offers excellent models that meet specific needs.
Our three absolute favorites perfectly encapsulate this diversity. The Huawei Watch Fit 4, priced at €170, proves that you can combine elegance, a premium screen, and comfortable battery life without breaking the bank. Its ultra-thin design made us forget we were even wearing a smartwatch, all while delivering reliable health and fitness metrics. For a first smartwatch or everyday fitness use, it represents the best compromise on the market.
The Garmin Forerunner 970, priced at €750, embodies the perfect modern sports watch. Its bright AMOLED screen transforms data review into a pleasure, its built-in flashlight eliminates the need for extra gear, and its pinpoint GPS accuracy truly supports athletic progress. We wore it daily for 45 days, and it never let us down, quickly becoming indispensable to our training. The significant investment is justified by its impeccable quality and expected durability.
The Coros Apex 4, priced at €499, revolutionized our perception of battery life with its 25 days of real-world use. Imagine going on a week-long trip without a charger, completely forgetting battery anxiety, and wearing the watch 24/7.
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