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Wearable comparison

Samsung Galaxy Watch 7 vs Xiaomi Watch S3

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Samsung Galaxy Watch 7

Samsung Galaxy Watch 7

  • Screen: 44 mm: 480 × 480 pixels; 40 mm: 432 × 432 pixels.
  • Exynos W1000, 3 nm processor.
  • 2 GB RAM in this version.
  • 32 GB storage in this version.
  • Runs Wear OS 5; One UI 6 Watch.
KSh 22,500In Stock
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02
Xiaomi Watch S3

Xiaomi Watch S3

  • Screen: 466 × 466 pixels; 326 ppi.
  • BES 2700BP processor.
  • 4 GB storage in this version.
  • Runs HyperOS.
  • Bluetooth 5.2 connection.
KSh 18,000In Stock
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Huawei Watch Fit 5KSh 18,500
Samsung Galaxy Watch FEKSh 19,500
AmazFit BalanceKSh 22,000
Amazfit Helio StrapKSh 22,000
Amazfit Active 2 Premium RoundKSh 22,000
Samsung Galaxy Watch 6KSh 22,500
Samsung Galaxy Watch 6 ClassicKSh 22,500
2 of 4 products

Our quick verdict

The Samsung Galaxy Watch 7 takes ECG heart-rhythm readings, is lighter to wear all day and has more storage (32 GB), while the Xiaomi Watch S3 lasts longer between charges (up to 15 days) and works with Android phones and iPhones.

Display

Samsung Galaxy Watch 7
44 mm: 480 × 480 pixels; 40 mm: 432 × 432 pixels
Xiaomi Watch S3
466 × 466 pixels; 326 ppi

Performance

Samsung Galaxy Watch 7
Exynos W1000, 3 nm processor
Xiaomi Watch S3
BES 2700BP processor

Storage

Samsung Galaxy Watch 7
32 GB storage in this version
Xiaomi Watch S3
4 GB storage in this version

Software

Samsung Galaxy Watch 7
Runs Wear OS 5; One UI 6 Watch
Xiaomi Watch S3
Runs HyperOS

Connections

Samsung Galaxy Watch 7
Bluetooth 5.3 connection
Xiaomi Watch S3
Bluetooth 5.2 connection

Key differences

The main differences to help you choose.

Samsung Galaxy Watch 7

  • Lighter: 33.8 g (vs 44 g).
  • ECG heart-rhythm readings.
  • More storage: 32 GB (vs 4 GB).
  • Blood-pressure (hypertension) notifications.
  • Slimmer: 9.7 mm thick (vs 12 mm).

Xiaomi Watch S3

  • Longer rated battery life: up to 15 days (vs 40 hours).
  • Works with Android phones and iPhones.

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

More topicsFewer topics
6 priorities selected.
How each product answers the selected priorities
PrioritySamsung Galaxy Watch 7Xiaomi Watch S3
Battery lifeUp to 40 hours per charge486 mAh battery
Storage32 GB storage4 GB storage
Display1.5-inch OLED display1.43-inch OLED display, 60 Hz, 326 ppi
PerformanceExynos W1000 processorBES 2700BP processor
Memory2 GB RAM32 MB
Battery capacity44 mm: 425 mAh486 mAh battery

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
Display44 mm: 1.5-inch Super AMOLED; 40 mm: 1.3-inch Super AMOLED1.43-inch AMOLED
Screen resolution44 mm: 480 × 480 pixels; 40 mm: 432 × 432 pixels466 × 466 pixels; 326 ppi
Display protectionSapphire crystalScratch/drop-proof glass
Display featuresFull-colour always-on display60 Hz refresh rate; always-on display; up to 600 nits brightness

Connectivity

Connectivity specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
Network / cellularGSM / HSPA / LTEBluetooth-connected smartphone
SIM / eSIMeSIM—
Wi-FiWi-Fi 2.4 GHz + 5 GHzNo
BluetoothBluetooth 5.3Bluetooth 5.2
NFCSupportedSupported (regional availability)
Positioning / GNSSDual-frequency GPS, L1 + L5; GLONASS; BeiDou; GalileoL1+L5 dual-band GNSS; BeiDou; GPS; GLONASS; Galileo; QZSS

Identity & design

Identity & design specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
BrandSamsungXiaomi
ModelSamsung Galaxy Watch 7Xiaomi Watch S3
Announced2024, July 102023, October 28
Dimensions44 mm: 44.4 × 44.4 × 9.7 mm; 40 mm: 40.4 × 40.4 × 9.7 mm47 × 47 × 12 mm
Weight44 mm: 33.8 g; 40 mm: 28.8 g, without band44 g without strap
Build materialsAluminum caseAluminum-alloy frame; stainless-steel bezel; Corning glass
Controls / buttonsTouchscreen and physical buttonsRotating crown, side control, interchangeable bezel interaction, and touchscreen
Wrist size—140–210 mm
Strap / band—Fluororubber

Performance & software

Performance & software specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
ProcessorExynos W1000, 3 nmBES 2700BP
CPU5-core—
GPUMali-G68—
RAM2 GB32 MB
Storage32 GB4 GB
Operating systemWear OS 5; One UI 6 WatchHyperOS

Audio & communication

Audio & communication specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth calling with a connected smartphone; standalone calling on LTE editionsBluetooth calling with a connected smartphone

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
SensorsSamsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensorHeart-rate and blood-oxygen sensor; accelerometer; gyroscope; electronic compass; barometer; ambient-light sensor; Hall sensor
Health & wellness featuresHeart-rate monitoring, ECG, blood pressure, body composition, blood oxygen, skin temperature and Energy Score; availability varies by market and paired phoneHeart rate, blood oxygen, stress, breathing and activity tracking; wellness data is not intended for medical diagnosis
Sleep trackingSleep tracking, sleep coaching and sleep-apnoea features where availableSleep monitoring supported
Sports / workout modesMultiple workout modes with automatic workout detection150+ sports modes
Training & outdoor featuresDual-frequency route tracking; personalised heart-rate zones and running metrics—
Safety & emergency featuresFall detection and SOS features when configured—

Battery & durability

Battery & durability specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
Battery capacity44 mm: 425 mAh; 40 mm: 300 mAh486 mAh lithium-ion polymer
Battery lifeUp to 40 hours with Always-On Display offUp to 15 days typical use with Android; 14.5 days with iOS; 5 days AOD use
ChargingFast wireless charging, WPC-based2-pin magnetic charging dock
Water resistance5 ATM; IP685 ATM
Durability / certificationsMIL-STD-810H—

Compatibility

Compatibility specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
Phone compatibilityAndroid 11.0 or later; more than 1.5 GB RAMAndroid 8.0 or later; iOS 12.0 or later
Companion appGalaxy Wearable; Samsung HealthMi Fitness
Colors44 mm: Green, Silver; 40 mm: Green, CreamBlack, Silver, Brown

Additional specifications

Additional specifications specifications comparison
SpecificationSamsung Galaxy Watch 7Xiaomi Watch S3
Case materialAluminumAluminum alloy
Release statusAvailable. Released 2024, July 24Available. Released 2023, October 28
Model numbersSM-L310F, SM-L315FM2323W1
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
2G bandsGSM 850 / 900 / 1800 / 1900—
3G bandsHSDPA 850 / 900 / 2100—
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 40, 66, 71—
Network speedHSPA, LTE—
SAR (EU)0.73 W/kg (head) 1.85 W/kg (body)—
Additional durability featuresArmor Aluminum 2—
Pixels per inch—326 ppi
Peak brightness—600 nits
Packing list—Watch with bezel and strap; charging dock; user manual

Similarities

  • Both have NFC.
  • Both have an aluminium case.
  • Both are water resistant to 50 m.
  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both have similar screen sizes (1.5 and 1.43 inches).

In summary

Get the Samsung Galaxy Watch 7 if you want ECG heart-rhythm readings and a lighter watch for all-day wear, or the Xiaomi Watch S3 if you would rather have longer battery life and a choice of Android phone or iPhone.

Back to compared products ↑

In-stock alternatives

Samsung Galaxy Watch 6For Samsung Galaxy Watch 7Samsung Galaxy Watch 6View product ↗Amazfit Active 2 Premium RoundFor Samsung Galaxy Watch 7Amazfit Active 2 Premium RoundView product ↗Huawei Watch Fit 5For Xiaomi Watch S3Huawei Watch Fit 5View product ↗Samsung Galaxy Watch FEFor Xiaomi Watch S3Samsung Galaxy Watch FEView product ↗

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