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Wearable comparison

Xiaomi Watch S1 vs OnePlus Watch 2

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Xiaomi Watch S1

Xiaomi Watch S1

  • 53 g.
  • Screen: 466 × 466 pixels.
  • Runs Proprietary OS.
  • Wi-Fi 4 support.
  • 470 mAh battery capacity.
KSh 28,290In Stock
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02
OnePlus Watch 2

OnePlus Watch 2

  • Screen: 466 × 466 pixels; 326 ppi.
  • Qualcomm Snapdragon W5 Gen 1; BES2700BP MCU processor.
  • 2 GB RAM in this version.
  • 32 GB storage in this version.
  • Runs Wear OS 4; RTOS.
KSh 29,500In Stock
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2 spaces available

Apple Watch SE 2KSh 28,500
Xiaomi Watch S4 41mmKSh 23,360
Xiaomi Watch 5KSh 30,000
Xiaomi Watch S5KSh 25,000
Amazfit GTR 3 ProKSh 20,000
Apple Watch Series 8KSh 50,000
Apple Watch UltraKSh 90,000
2 of 4 products

Our quick verdict

The Xiaomi Watch S1 is the stronger choice: it lasts longer between charges (up to 12 days), works with Android phones and iPhones and is lighter to wear all day, while the OnePlus Watch 2 only syncs with apps such as Strava.

Display

Xiaomi Watch S1
466 × 466 pixels
OnePlus Watch 2
466 × 466 pixels; 326 ppi

Software

Xiaomi Watch S1
Runs Proprietary OS
OnePlus Watch 2
Runs Wear OS 4; RTOS

Capacity

Xiaomi Watch S1
470 mAh battery capacity
OnePlus Watch 2
500 mAh battery capacity

Portability

Xiaomi Watch S1
53 g
OnePlus Watch 2
80 g

Connections

Xiaomi Watch S1
Wi-Fi 4, Bluetooth 5.2
OnePlus Watch 2
Bluetooth 5.0

Key differences

The main differences to help you choose.

Xiaomi Watch S1

  • Longer rated battery life: up to 12 days (vs 100 hours).
  • Works with Android phones and iPhones.
  • Lighter: 53 g (vs 80 g).
  • Slimmer: 11 mm thick (vs 12.1 mm).
  • Newer Bluetooth 5.2 (vs 5.0).

OnePlus Watch 2

  • Syncs with third-party apps such as Strava and Apple Health.
  • Dual-band Wi-Fi (vs 2.4 GHz only).
  • Newer model: released in 2024 (vs 2021).

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.

6 priorities selected.
How each product answers the selected priorities
PriorityXiaomi Watch S1OnePlus Watch 2
Battery life470 mAh battery500 mAh battery
Portability53 g80 g
Display1.43-inch OLED display, 60 Hz1.43-inch OLED display, 326 ppi
SoftwareProprietary OSWear OS 4
ConnectionsWi-Fi 4, Bluetooth 5.2Bluetooth 5.0
Water resistance5 ATMIP68 water and dust resistance

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
Display1.43-inch AMOLED1.43-inch AMOLED
Screen resolution466 × 466 pixels466 × 466 pixels; 326 ppi
Display protectionSapphire glass2.5D sapphire crystal
Display featuresAlways-on display; 60 Hz1000 nits (HBM)

Connectivity

Connectivity specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
Network / cellularNo cellular connectivityNo cellular connectivity
SIM / eSIMNoNo
Wi-FiIEEE 802.11b/g/n, 2.4 GHzWi-Fi 2.4 GHz + 5 GHz
BluetoothBluetooth 5.2Bluetooth 5.0 BLE
NFCSupported; Mastercard payments (regional availability)Supported
Positioning / GNSSDual-band GPS; BeiDou; GLONASS; Galileo; QZSSDual-frequency L1 + L5; GPS; BeiDou; Galileo; GLONASS; QZSS

Identity & design

Identity & design specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
BrandXiaomiOnePlus
ModelXiaomi Watch S1OnePlus Watch 2
Announced2021, December 282024, February 26
Dimensions46.5 × 46.5 × 11 mm, excluding strap and protrusions47.0 × 46.6 × 12.1 mm; 13.65 mm including PPG sensor
Weight53 g (1.87 oz)Approximately 49 g without strap; 80 g with strap
Build materialsStainless-steel case; sapphire glassStainless steel; PC and glass-fibre back
Wrist size165.1–225.1 mm (leather); 149.8–233.8 mm (fluororubber)140–210 mm
Strap / bandCalfskin leather and fluororubberFluororubber; stainless-steel buckle
Controls / buttonsDedicated sport buttonTwo side buttons and touchscreen

Performance & software

Performance & software specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
Operating systemProprietary OSWear OS 4; RTOS
Processor—Qualcomm Snapdragon W5 Gen 1; BES2700BP MCU
RAM—2 GB
Storage—32 GB

Audio & communication

Audio & communication specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth calling with a connected smartphoneBluetooth calling with a connected smartphone

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
SensorsHeart-rate and blood-oxygen sensor; accelerometer; gyroscope; geomagnetic sensor; atmospheric-pressure sensor; ambient-light sensorAccelerometer; gyroscope; optical heart-rate sensor; optical blood-oxygen sensor; geomagnetic sensor; ambient-light sensor; barometer
Health & wellness featuresHeart-rate, blood-oxygen, stress and breathing features; personal reference onlyHeart rate; high and low heart-rate alerts; SpO₂ spot checks and all-day monitoring; stress; breathing exercises
Sleep trackingSupported; short-nap data limitations applyDeep, light and REM sleep; awake time; sleep score; breathing rate; SpO₂; snoring-risk assessment
Sports / workout modes117 workout modes, including 19 professional modes100+ sports modes
Training & outdoor featuresAutomatic detection of supported walking, outdoor running and treadmill activitiesAerobic training effect; cardiorespiratory capacity; recovery time; heart-rate recovery; running form; track running

Battery & durability

Battery & durability specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
Battery capacity470 mAh lithium-ion polymer500 mAh
Battery lifeUp to 12 days typical use; 24 days power-saving modeUp to 100 hours smart mode; 48 hours heavy use; 12 days power saver
ChargingWireless charging dockCharging base with USB-C cable
Water resistance5 ATM5 ATM; IP68
Durability / certifications—MIL-STD-810H

Compatibility

Compatibility specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
Phone compatibilityAndroid 6.0 or later; iOS 10.0 or laterAndroid 8.0 or later; GMS 23.45.23 or later
Companion appMi FitnessOHealth
ColorsBlack, SilverBlack Steel; Radiant Steel

Additional specifications

Additional specifications specifications comparison
SpecificationXiaomi Watch S1OnePlus Watch 2
Case material316L stainless steelStainless steel
Pixels per inch326 ppi326 ppi
Packing listWatch; wireless charging dock; USB cable; user manual; additional fluororubber strapWatch; charging base; strap; USB-C cable; safety guide; quick start guide
Display1.43-inch AMOLED; 466 × 466—
Case and glassStainless steel case; sapphire glass—
PositioningDual-band GNSS: GPS, BeiDou, GLONASS, Galileo and QZSS—
Workout modes117 modes, including 19 professional modes; software dependent—
Battery470mAh lithium-ion polymer—
Battery lifeUp to 12 days typical use or 24 days power saving in manufacturer testing—
Bluetooth and Wi-FiBluetooth 5.2; 2.4GHz Wi-Fi—
Dimensions46.5 × 46.5 × 11mm, excluding strap and local protrusions—
Water resistance5 ATM; restrictions apply—
Package contentsWatch, wireless charging dock, USB cable, manual and additional fluororubber strap—
Release statusAvailable. Released 2021, December 31Available. Released 2024, March 05
Model numbersM2108W1—
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
2G bandsNot applicable—
3G bands——
4G bands——
Network speedNoNo
Peak brightness—600 nits default maximum
Charging time—60 minutes to 100%; 10 minutes for 24 hours of use
Smart recognition—Running; walking; cycling; swimming; rowing machine; elliptical
Third-party fitness apps—Wear OS apps; Google apps; Google Health Connect; Strava
RTOS storage—4 GB eMMC

Similarities

  • Both have NFC.
  • Both have a stainless steel case.
  • Both are water resistant to 50 m.
  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both have 1.43-inch screens.

In summary

For most buyers the Xiaomi Watch S1 is the better buy; the OnePlus Watch 2 makes sense if you want syncing with apps such as Strava.

Back to compared products ↑

In-stock alternatives

Apple Watch SE 2For Xiaomi Watch S1Apple Watch SE 2View product ↗OnePlus Watch 2RFor Xiaomi Watch S1OnePlus Watch 2RView product ↗Fitbit Sense 2For OnePlus Watch 2Fitbit Sense 2View product ↗Huawei Watch GT 7 46mmFor OnePlus Watch 2Huawei Watch GT 7 46mmView product ↗

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