Scored using Smartwatches Methodology v2.0
Smartwatches Methodology v2.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontumo Smartwatches Methodology v2.0: technical specifications plus grades from 3,488 independent expert reviews and 5,192 video reviews, with 0% commercial bias.
Explore Smartwatches Methodology v2.0

Xiaomi Watch S3 Review | 126 Data compared

Avg. price:~£110Screen size:1.43 inchBattery life:15 daysDisplay type:AMOLED

Xiaomi Watch S3 Review: Compare 126 technical specifications and 19 expert and video reviews to see how this product ranks in the Smartwatches category and whether it is worth buying.

8.0

Overall score

Score
8.0/ 10
✕
What it is
An overall evaluation of the smartwatch's quality, based on technical analyses and user reviews.
When it matters
When you need a quick reference to identify the best smartwatches on the market.
Score distribution
▼
<55-66-77-88-99-10
Score components

70%

7.9

Technical score

30%

8.3

Review score ( 7 · 12)

Review score 30% · 8.3 · based on 19 independent reviews
Every model in this category gets the same split: reviews 30%, technical score 70%. This model has enough reviews, so its review score is the weighted average of their grades. 17 more reviews are not scored yet.
▲Better than 86% of smartwatches
7.9

Technical score

Technical score
7.9/ 10
✕
What it is
An assessment of the smartwatchx27s technical performance, covering seven key areas: health, fitness, display & design, hardware, battery, smart features and connectivity.
When it matters
When you want to compare smartwatches based on technical performance and available features.
Score distribution
▼
<55-66-77-88-99-10
Score components

24%

7.3

Health

21%

9.8

Fitness

16%

7.9

Battery

14%

8.0

Smart features

12%

6.5

Connectivity

9%

7.6

Display & Design

4%

7.2

Hardware

▲Better than 85% of smartwatches
8.3

Review score

Review score
8.3/ 10
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves.
Weighting: Big test sites count more, short reviews half as much as full tests. A video review counts half.
Share: Reviews are 30% of the overall score for every model in this category; each of the 5 needed reviews that is missing counts as 7/10.
Score distribution
▼
<55-66-77-88-99-10
Grades by review (19)
7 reviews: 2 with a printed score, 5 estimated from the review. 12 video reviews, each counting half as much as a written test. Share in the overall score: 30%, the same for every model in this category.
Text reviews 2
✓ explicit
1
≈ estimated
1
Video reviews 3
estimated from the review
Shop star ratings are not part of this score.
▲Better than 84% of smartwatches
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Technical Specifications of smartwatch Xiaomi Watch S3

Technical score
Technical score
7.9/ 10
✕
What it is
An assessment of the smartwatchx27s technical performance, covering seven key areas: health, fitness, display & design, hardware, battery, smart features and connectivity.
When it matters
When you want to compare smartwatches based on technical performance and available features.
Score distribution
▼
<55-66-77-88-99-10
Score components:

24%

7.3

Health

21%

9.8

Fitness

16%

7.9

Battery

14%

8.0

Smart features

12%

6.5

Connectivity

9%

7.6

Display & Design

4%

7.2

Hardware

7.9
Review score
Review score
8.3/ 10
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves.
Weighting: Big test sites count more, short reviews half as much as full tests. A video review counts half.
Share: Reviews are 30% of the overall score for every model in this category; each of the 5 needed reviews that is missing counts as 7/10.
Score distribution
▼
<55-66-77-88-99-10
Grades by review (19)
7 reviews: 2 with a printed score, 5 estimated from the review. 12 video reviews, each counting half as much as a written test. Share in the overall score: 30%, the same for every model in this category.
Text reviews 2
✓ explicit
1
≈ estimated
1
Video reviews 3
estimated from the review
Shop star ratings are not part of this score.
8.3
Popularity
Popularity
8.6/ 10
✕
What it is
An indicator based on the number of reviews received by the smartwatch.
When it matters
When you prefer to purchase a product chosen and reviewed by many other consumers.
Score distribution
▼
<55-66-77-88-99-10
Popularity:
Xiaomi Watch S3 has a popularity of 8.6 points, which is higher than 79% of smartwatches.
8.6
Value for money
Value for money
8.6/ 10
✕
What it is
An indicator that combines the smartwatch's overall rating with its cost.
When it matters
When you are looking for a smartwatch with a good balance between quality and price.
Score distribution
▼
<55-66-77-88-99-10
Score components:

60%

8.0

Overall score

40%

9.9

Price

8.6
Brand name
Xiaomi
Heart rate monitor
yes
Heart rate monitor
yes
This smartwatch includes a heart rate monitor. 10.5% of smartwatches include a heart rate monitor.
Blood oxygen monitoring
yes
Blood oxygen monitoring
yes
This smartwatch supports blood oxygen monitoring. 33.4% of smartwatches support blood oxygen monitoring.
ECG
no
ECG
no
This smartwatch does not support ECG. 16.6% of smartwatches support ECG.
Irregular heart rate warnings
yes
Irregular heart rate warnings
yes
This smartwatch supports irregular heart rate warnings. 51.9% of smartwatches support irregular heart rate warnings.
Supports abnormal high/low heart-rate alerts (typically after inactivity).
Show more
What reviewers say
Accelerometer
yes
Accelerometer
yes
This smartwatch includes an accelerometer. 0.6% of smartwatches include an accelerometer.
Barometer
yes
Barometer
yes
This smartwatch includes a barometer. 50.6% of smartwatches include a barometer.
Gyroscope
yes
Gyroscope
yes
This smartwatch includes a gyroscope. 30.2% of smartwatches include a gyroscope.
Cadence sensor
yes
Cadence sensor
yes
This smartwatch includes a cadence sensor. 69% of smartwatches include a cadence sensor.
Distance tracking
yes
Distance tracking
yes
This smartwatch supports distance tracking. 4.1% of smartwatches support distance tracking.
Show more
What reviewers say
Battery life
15 days
Battery life
15 days
This smartwatch offers a battery life of 15 days which is longer than that of 86.3% of smartwatches and equal to that of 3.2% of smartwatches.
Battery life in training mode
25.5 h
Battery life in training mode
25.5 h
This smartwatch lasts 25.5 h in training mode which is longer than 66.1% of smartwatches.
Battery life with GPS on
?
Battery power
396 mAh
Battery power
396 mAh
This smartwatch has a battery capacity of 396 mAh which is larger than the batteries in 74.6% of smartwatches.
Charge time
70 min
Charge time
70 min
This smartwatch charges in 70 min which is faster than 79.7% of smartwatches and equal to the charge time of 1% of smartwatches.
Show more
What reviewers say
Operating system
HyperOS
Operating system
HyperOS
This smartwatch runs HyperOS which is more advanced than the operating system in 58.8% of smartwatches and the same as that in 1.3% of smartwatches.
Software update frequency
occasional
Software update frequency
occasional
This smartwatch has occasional software update support which is more active than that of 57.6% of smartwatches and equal to that of 36.2% of smartwatches.
Third-party app support
no
Third-party app support
no
This smartwatch does not support third-party apps. 47.7% of smartwatches support third-party apps.
Notifications
yes
Notifications
yes
This smartwatch supports notifications. 0.3% of smartwatches support notifications.
Voice assistant support
yes
Voice assistant support
yes
This smartwatch supports voice assistants. 32.4% of smartwatches support voice assistants.
Show more
What reviewers say
Cellular module
no
Cellular module
no
This smartwatch does not include a cellular module. 18% of smartwatches include a cellular module.
SIM cards
0
GPS
yes
GPS
yes
This smartwatch supports GPS. 43.9% of smartwatches support GPS.
Galileo support
yes
Galileo support
yes
This smartwatch supports Galileo navigation. 61.6% of smartwatches support Galileo navigation.
Compass
yes
Compass
yes
This smartwatch includes a compass. 47.5% of smartwatches include a compass.
Show more
What reviewers say
Screen size
1.43 inch
Screen size
1.43 inch
This smartwatch has a screen size of 1.43 inch which is larger than the screens of 56.3% of smartwatches and equal to those of 8.2% of smartwatches.
Display type
AMOLED
Display type
AMOLED
This smartwatch uses a AMOLED display type which is more advanced than that of 49.9% of smartwatches and the same as that of 50.1% of smartwatches.
Resolution
466x 466
Resolution
466x 466
This smartwatch has a display resolution of 466x466 which is higher than that of 87.4% of smartwatches and equal to that of 10.9% of smartwatches.
Pixel density
461 ppi
Pixel density
461 ppi
This smartwatch has a pixel density of 461 ppi which is higher than that of 84.5% of smartwatches and equal to that of 6.5% of smartwatches.
Display brightness
600 nits
Display brightness
600 nits
This smartwatch reaches 600 nits of display brightness, which is higher than that of 38.8% of smartwatches and equal to that of 14.1% of smartwatches.
Show more
What reviewers say
CPU speed
?
Processor model
?
RAM
?
Internal storage
4 GB
Internal storage
4 GB
This smartwatch uses 4 GB for internal storage which is larger than that of 40.4% of smartwatches and equal to that of 27% of smartwatches.
External memory slot
no
External memory slot
no
This smartwatch does not include an external memory slot. 0.3% of smartwatches include an external memory slot.
Show more

Xiaomi Watch S3 vs the average smartwatch

246810TotalHealthFitnessBatteryConnectivityDisplay & DesignSmart featuresHardware
  • 8 days day/s longer battery life
    Battery life
    15 days
    This smartwatch offers 15 days of battery life, while the average smartwatch offers 7 days.
    15 days vs 7 days
  • Readiness score
    Readiness score
    yes
    This smartwatch supports readiness scores, the average smartwatch does not. 17.5% of smartwatches support readiness scores.
  • Fall detection
    Fall detection
    yes
    This smartwatch supports fall detection, the average smartwatch does not. 21.3% of smartwatches support fall detection.
  • HRV tracking
    HRV tracking
    yes
    This smartwatch supports HRV tracking, the average smartwatch does not. 40.8% of smartwatches support HRV tracking.
  • 50 min shorter charge time
    Charge time
    70 min
    This smartwatch charges faster than the average smartwatch (70 min vs 120 min). The average smartwatch charges in 120 min.
    70 min vs 120 min
  • VO2 max measurement
    VO2 max measurement
    yes
    This smartwatch measures VO2 max, the average smartwatch does not. 47.6% of smartwatches measure VO2 max.
  • Emergency SOS
    Emergency SOS
    yes
    This smartwatch includes Emergency SOS, the average smartwatch does not. 42.8% of smartwatches include Emergency SOS.
    paired phone required on standard model
  • NFC functionality
    NFC
    yes
    This smartwatch supports NFC, the average smartwatch does not. 43.4% of smartwatches support NFC.
    NFC hardware is present, but functionality may be limited by region/app support.
  • 14.6% better value for money
    Xiaomi Watch S3 has a higher value-for-money score than the average smartwatch (8.62 vs 7.5).
    8.62 vs 7.52
  • Readiness score
    Readiness score
    yes
    This smartwatch supports readiness scores, the average smartwatch does not. 17.5% of smartwatches support readiness scores.
  • HRV tracking
    HRV tracking
    yes
    This smartwatch supports HRV tracking, the average smartwatch does not. 40.8% of smartwatches support HRV tracking.
  • VO2 max measurement
    VO2 max measurement
    yes
    This smartwatch measures VO2 max, the average smartwatch does not. 47.6% of smartwatches measure VO2 max.
  • Irregular heart rate alerts
    Irregular heart rate warnings
    yes
    This smartwatch supports irregular heart rate warnings, the average smartwatch does not. 48.1% of smartwatches support irregular heart rate warnings.
    Supports abnormal high/low heart-rate alerts (typically after inactivity).
  • Calorie tracking
    Calorie tracking
    yes
    This smartwatch supports calorie tracking, the average smartwatch does not. 48.6% of smartwatches support calorie tracking.
  • Barometer sensor included
    Barometer
    yes
    This smartwatch includes a barometer, the average smartwatch does not. 49.5% of smartwatches include a barometer.
  • Cadence tracking
    Cadence sensor
    yes
    This smartwatch includes a cadence sensor, the average smartwatch does not. 31.1% of smartwatches include a cadence sensor.
  • 70 more exercise profiles
    Multi-sport mode
    150
    This smartwatch supports more exercise modes than the average smartwatch (150 vs 80). The average smartwatch supports 80 exercise modes.
    Reported as at least 150 exercise modes.
    150 vs 80
  • 8 days day/s longer battery life
    Battery life
    15 days
    This smartwatch offers 15 days of battery life, while the average smartwatch offers 7 days.
    15 days vs 7 days
  • 50 min shorter charge time
    Charge time
    70 min
    This smartwatch charges faster than the average smartwatch (70 min vs 120 min). The average smartwatch charges in 120 min.
    70 min vs 120 min
  • 96 mAh larger battery capacity
    Battery life
    396 mAh days
    This smartwatch has a larger battery capacity than the average smartwatch (396 mAh vs 300 mAh). The average smartwatch battery is 300 mAh.
    396 mAh vs 300 mAh
  • 6.25 h longer training battery life
    Battery life in training mode
    25.5 h
    This smartwatch lasts longer in training mode than the average smartwatch (25.5 h vs 19.25 h). The average smartwatch lasts 19.25 h.
    25.5 h vs 19.25 h
  • NFC functionality
    NFC
    yes
    This smartwatch supports NFC, the average smartwatch does not. 43.4% of smartwatches support NFC.
    NFC hardware is present, but functionality may be limited by region/app support.
  • Galileo satellite support
    Galileo support
    yes
    This smartwatch supports Galileo navigation, the average smartwatch does not. 38.5% of smartwatches support Galileo navigation.
  • Newer Bluetooth version
    Bluetooth version
    5.2
    This smartwatch supports a newer Bluetooth version than the average smartwatch (5.2 vs 5). The average smartwatch uses 5.0.
    5.2 vs 5.0
  • Stronger display glass
    Display glass type
    Corning Gorilla Glass
    This smartwatch uses Corning Gorilla Glass display glass, while the average smartwatch uses mineral glass.
    Corning Gorilla Glass vs mineral glass
  • 135 ppi higher pixel density
    Pixel density
    461 ppi
    This smartwatch has a higher pixel density than the average smartwatch (461 ppi vs 326 ppi). The average smartwatch display reaches 326 ppi.
    461 ppi vs 326 ppi
  • Better case material
    Case material
    aluminum, stainless steel
    This smartwatch uses aluminum, stainless steel for the case material, while the average smartwatch uses polycarbonate.
    aluminum alloy middle frame with stainless steel bezel
    aluminum, stainless steel vs polycarbonate
  • Higher resolution
    Display type
    466 x 466
    This smartwatch has a display resolution of 466x466, while the average smartwatch reaches 352x430.
    466x466 vs 352x430
  • Better band material
    Band material
    silicone, rubber, leather
    This smartwatch uses silicone, rubber, leather for the band material, while the average smartwatch uses silicone.
    silicone, rubber, leather vs silicone
  • Fall detection
    Fall detection
    yes
    This smartwatch supports fall detection, the average smartwatch does not. 21.3% of smartwatches support fall detection.
  • Emergency SOS
    Emergency SOS
    yes
    This smartwatch includes Emergency SOS, the average smartwatch does not. 42.8% of smartwatches include Emergency SOS.
    paired phone required on standard model
  • More frequent updates
    Software update frequency
    occasional
    This smartwatch receives occasional software updates, while the average smartwatch receives ended updates.
    occasional vs ended
  • More advanced operating system
    Operating system
    HyperOS
    This smartwatch runs a more advanced operating system than the average smartwatch (HyperOS vs Proprietary OS).
    HyperOS vs Proprietary OS
  • 2 year/s newer release date
    Release date
    2023
    This smartwatch has a newer release date than the average smartwatch (2023 vs 2021). The average smartwatch was released in 2021.
    October 2023
    2023 vs 2021
  • No achievement tracking
    Achievements
    no
    This smartwatch does not support achievements, the average smartwatch does. 85.8% of smartwatches support achievements.
  • 5 mm wider watch width
    Width
    47.0 mm
    This smartwatch is wider than the average smartwatch (47 mm vs 42 mm). The average smartwatch width is 42.0 mm.
    47.0 mm vs 42.0 mm
  • 2 mm taller watch height
    Height
    47.0 mm
    This smartwatch is taller than the average smartwatch (47 mm vs 45 mm). The average smartwatch height is 45 mm.
    47.0 mm vs 45 mm
  • 0.4 mm thicker watch body
    Thickness
    12 mm
    This smartwatch is thicker than the average smartwatch (12 mm vs 11.6 mm). The average smartwatch thickness is 11.6 mm.
    Some sources mention variant-dependent thickness values.
    12 mm vs 11.6 mm
  • No achievement tracking
    Achievements
    no
    This smartwatch does not support achievements, the average smartwatch does. 85.8% of smartwatches support achievements.
  • 5 mm wider watch width
    Width
    47.0 mm
    This smartwatch is wider than the average smartwatch (47 mm vs 42 mm). The average smartwatch width is 42.0 mm.
    47.0 mm vs 42.0 mm
  • 0.4 mm thicker watch body
    Thickness
    12 mm
    This smartwatch is thicker than the average smartwatch (12 mm vs 11.6 mm). The average smartwatch thickness is 11.6 mm.
    Some sources mention variant-dependent thickness values.
    12 mm vs 11.6 mm
  • 2 mm taller watch height
    Height
    47.0 mm
    This smartwatch is taller than the average smartwatch (47 mm vs 45 mm). The average smartwatch height is 45 mm.
    47.0 mm vs 45 mm

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

8.0
The Wearableist
≈ estimated
05/07/2024
Full review · battery, GNSS accuracy and app tests
Verdict
Xiaomi Watch S3 mostly delivers on its premium promises, but short battery life, broken gestures and a missing water rating hold it back.
9.0
TechMishka
≈ estimated
13/04/2024
Hands-on review · health tracking, GPS and software
Verdict
Xiaomi Watch S3 is easy to recommend as a budget smartwatch, with good health tracking and smooth software.
9.0
Tech Spurt
≈ estimated
13/03/2024
Long-term test · two weeks of daily use
Verdict
Xiaomi Watch S3 is one of the best budget smartwatches, with excellent battery life and a customisable design despite a few glitches.
Not graded yet
Not graded yet
Not graded yet
Not graded yet
Not graded yet
Not graded yet

What reviewers agree on

Based on 7 · 12

Swappable bezels and straps, health tracking and accurate GPS impress, but notifications fall short and battery life divides opinion.
Praised
Mixed views
Criticised
Pick a topic to see who said what

Expert reviews

In-depth analysis and verdict from leading tech publications

7.0
androidpolice.com
✓ explicit
10/09/2024
Long-term test · Swappable bezels
Verdict
The Xiaomi Watch S3 suits buyers who want reliable fitness tracking and swappable bezels more than apps, though official bezels are hard to find in the US.
cgmagonline.com
18/04/2024
Not graded yet
8.0
cnetfrance.fr
≈ estimated
19/09/2024
Hands-on test · Battery and design
Verdict
The Xiaomi Watch S3 is a stylish watch with a week-long battery, best as a first smartwatch for buyers who don't need to reply from the wrist.
9.0
lemondenumerique.ouest-france.fr
≈ estimated
11/10/2024
Multi-week test · Swappable bezel
Verdict
The Xiaomi Watch S3 is a light, customizable watch with a bright, sharp screen, suited to everyday wear and open-water swims.
8.0
tomshw.it
✓ explicit
05/07/2024
Hands-on review · Fitness tracking
Verdict
The Xiaomi Watch S3 covers the basics with accurate fitness tracking and a long battery, but without third-party apps, Wear OS is the better pick for app fans.
8.0
macitynet.it
≈ estimated
24/01/2025
Hands-on test · Swappable bezel
Verdict
The Xiaomi Watch S3 suits buyers who want a stylish watch with long battery life and don't need to reply to messages from the wrist.

Third-party reviews

What we like about Xiaomi Watch S3

  • Unique interchangeable bezel design that automatically suggests matching watch faces
  • Exceptional battery life, often lasting 7–15 days on a single charge
  • Affordable price point compared to premium competitors
  • Bright and vibrant 1.43-inch AMOLED display with smooth 60Hz refresh rate
  • Lightweight aluminum body that is comfortable for all-day wear and sleep tracking
  • Broad fitness support with over 150 sports modes and dual-band GPS
  • Functional basic features like Bluetooth calling, music control, and Alexa integration

What we don't like about Xiaomi Watch S3

  • Proprietary HyperOS lacks support for third-party apps (e.g., Spotify, Google Maps)
  • Limited notification interaction with no ability to reply to messages
  • NFC payments are restricted to specific regions and limited to Mastercard
  • Interchangeable bezels can occasionally feel loose or rattle during vibrations
  • Lack of wireless charging support; requires a proprietary two-pin magnetic puck
  • Mixed reports on sensor accuracy, particularly heart rate tracking during intense workouts
  • Voice recorder files are stored locally on the watch and cannot be exported

Verdict

The Xiaomi Watch S3 is a versatile smartwatch featuring a 1.43-inch AMOLED display with a 60Hz refresh rate, 600 nits peak brightness, and a unique interchangeable magnetic bezel system for deep physical customization. Running on Xiaomi HyperOS, it offers robust performance with L1+L5 dual-band GNSS for accurate tracking, over 150 sports modes, and comprehensive 12-channel health monitoring for heart rate, SpO2, and sleep. Key pros include an impressive battery life of up to 15 days, rapid charging that provides 2 days of use in just 5 minutes, and support for Bluetooth calling and NFC payments. However, notable cons include a lack of third-party app support due to the proprietary OS, limited interaction with notifications compared to Wear OS, and certain advanced features being restricted to Xiaomi smartphone users.

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