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Wearable comparison

OnePlus Watch 4 vs Xiaomi Watch S1 Pro

Compare battery life, health tracking, display and fit.

Compared products
01Selected
OnePlus Watch 4

OnePlus Watch 4

  • Screen: 466 × 466 pixels; 310 ppi.
  • Qualcomm Snapdragon W5; BES2800 MCU processor.
  • 2 GB RAM in this version.
  • 32 GB storage in this version.
  • Runs OxygenOS Watch 8; Wear OS 6.0.
KSh 38,500In Stock
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02
Xiaomi Watch S1 Pro

Xiaomi Watch S1 Pro

  • 48.5 g.
  • Screen: 480 × 480 pixels.
  • 12 nm chip processor.
  • Runs MIUI Watch OS.
  • Wi-Fi 4 support.
KSh 38,380In Stock
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2 spaces available

Google Pixel Watch 3KSh 37,500
Samsung Galaxy Watch 8 ClassicKSh 38,500
WHOOP ONE 5.0 SensorKSh 37,000
OnePlus Watch 3KSh 33,000
Samsung Galaxy Watch 9 40mmKSh 39,500
Amazfit Balance 2KSh 39,000
Huawei Watch GT Runner 2KSh 37,000
2 of 4 products

Our quick verdict

The Xiaomi Watch S1 Pro lasts longer between charges (14 days), works with Android phones and iPhones and is lighter to wear all day, while the OnePlus Watch 4 has a bigger battery (646 mAh), a brighter screen for outdoor use and a premium titanium build.

Display

OnePlus Watch 4
466 × 466 pixels; 310 ppi
Xiaomi Watch S1 Pro
480 × 480 pixels

Performance

OnePlus Watch 4
Qualcomm Snapdragon W5; BES2800 MCU processor
Xiaomi Watch S1 Pro
12 nm chip processor

Software

OnePlus Watch 4
Runs OxygenOS Watch 8; Wear OS 6.0
Xiaomi Watch S1 Pro
Runs MIUI Watch OS

Battery life

OnePlus Watch 4
646 mAh battery
Xiaomi Watch S1 Pro
500 mAh battery

Portability

OnePlus Watch 4
68 g
Xiaomi Watch S1 Pro
48.5 g

Key differences

The main differences to help you choose.

OnePlus Watch 4

  • Bigger battery: 646 mAh (vs 500 mAh).
  • Brighter display: up to 3,000 nits (vs 600).
  • Titanium case (vs stainless steel case and plastic back).
  • Newer model: released in 2026 (vs 2022).

Xiaomi Watch S1 Pro

  • Longer battery life: up to 14 days (vs 5).
  • Works with Android phones and iPhones.
  • Lighter: 48.5 g (vs 68 g).
  • Syncs with third-party apps such as Strava and Apple Health.

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
PriorityOnePlus Watch 4Xiaomi Watch S1 Pro
Battery life646 mAh battery500 mAh battery
Portability68 g48.5 g
Display1.5-inch OLED display, 310 ppi1.47-inch OLED display
PerformanceQualcomm Snapdragon W5 processor12 nm chip processor
SoftwareOxygenOS Watch 8MIUI Watch OS
ConnectionsBluetooth 5.2Wi-Fi 4, Bluetooth 5.2

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
Display1.5-inch LTPO OLED1.47-inch AMOLED
Screen resolution466 × 466 pixels; 310 ppi480 × 480 pixels
Display protectionSapphire crystalSynthetic sapphire glass
Display features600 nits (typ), 1600 nits (HBM), 3000 nits (peak)Always-on display; up to 600 nits brightness

Connectivity

Connectivity specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
Network / cellularNo cellular connectivityNo cellular connectivity
SIM / eSIMUnsupportedNo
Wi-FiWi-Fi 2.4 GHz + 5 GHzWi-Fi 802.11 b/g/n (China only)
BluetoothBluetooth 5.25.2, A2DP, LE
NFCSupportedSupported; Mastercard payments (regional availability)
Positioning / GNSSDual-frequency L1 + L5; GPS; BeiDou; Galileo; GLONASS; QZSSDual-band GPS; BeiDou; GLONASS; Galileo; QZSS

Identity & design

Identity & design specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
BrandOnePlusXiaomi
ModelOnePlus Watch 4Xiaomi Watch S1 Pro
Announced2026, April 222022, August 12
Dimensions47.4 × 47.4 × 11.0 mm46 x 46 x 11.3 mm (1.81 x 1.81 x 0.44 in)
WeightApproximately 43 g without strap; 68 g with strap48.5 g (1.73 oz)
Build materialsTitanium-alloy case; PA and fibreglass backSapphire crystal front, stainless steel frame, sapphire crystal (heart rate zone), plastic back
Wrist size140–210 mm135–205mm with supplied brown leather strap
Strap / bandFluororubberCalfskin leather or fluororubber
Controls / buttons—Rotatable crown and watch button

Performance & software

Performance & software specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
ProcessorQualcomm Snapdragon W5; BES2800 MCU12 nm chip
RAM2 GB—
Storage32 GB—
Operating systemOxygenOS Watch 8; Wear OS 6.0MIUI Watch OS

Audio & communication

Audio & communication specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth calling with a connected smartphoneBluetooth calling; AI call noise reduction

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
SensorsAccelerometer; gyroscope; optical heart-rate sensor; optical blood-oxygen sensor; geomagnetic sensor; ambient-light sensor; barometer; wrist-temperature sensorHeart-rate sensor with blood-oxygen sensor; accelerometer; gyroscope; geomagnetic; atmospheric; ambient light; capacitive; temperature
Health & wellness featuresHeart rate; high and low heart-rate alerts; SpO₂ spot checks and all-day monitoring; stress; breathing exercises; cycle tracking; 60-second Wellness OverviewAll-day heart rate; blood oxygen; stress tracking; high/low heart-rate alerts
Sleep trackingDeep, light and REM sleep; awake time; sleep score; breathing rate; SpO₂; snoring-risk assessmentSleep tracking
Sports / workout modes100+ sports modes100+ fitness modes
Training & outdoor featuresAerobic training effect; cardiorespiratory capacity; recovery time; heart-rate recovery; running form; track runningTen running courses; independent dual-band positioning; mountaineering distance tracking
Safety & emergency featuresFall detection; emergency rescue—

Battery & durability

Battery & durability specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
Battery capacity646 mAh typical; 632 mAh rated500 mAh
Battery lifeUp to 5 days smart mode; 3 days heavy use; 16 days power saverUp to 14 days typical use; 10 days intensive use; 5 days AOD use
ChargingCharging base with USB-C cableWireless fast charging
Water resistance5 ATM; IP69; IP685 ATM
Durability / certificationsMIL-STD-810H—

Compatibility

Compatibility specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
Phone compatibilityAndroid 9.0 or later; GMS 23.45.23 or laterAndroid 6.0 or higher; iOS 11 or higher
Companion appOHealthMi Fitness
ColorsMidnight Titanium; Evergreen TitaniumBlack, Silver

Additional specifications

Additional specifications specifications comparison
SpecificationOnePlus Watch 4Xiaomi Watch S1 Pro
Case materialTitanium alloyStainless steel
Pixels per inch310 ppi—
Peak brightness600 nits typical; 1,500 nits high-brightness mode; 3,000 nits peak in supported sports modes600 nits
Charging timeApproximately 75 minutesApproximately 85 minutes full charge; 10 minutes for up to 2 days typical use
Packing listWatch; charging base; strap; USB-C cable; user guide; safety and warranty bookletWatch, wireless charging dock including charging cable, user manual including warranty notice
Smart recognitionRunning; walking; cycling; swimming; rowing machine; elliptical—
Release statusAvailable. Released 2026, AprilAvailable. Released 2022, August 12
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
Maximum charging powerApproximately 7.5 W—
Operating temperature0–35 °C—
Vibration motor—Linear vibration motor
Watch weight without strap—48.5g without strap
Display material—Synthetic sapphire
Cover / touchscreen—AMOLED touchscreen
Sports coach—10 built-in running courses
Third-party fitness apps—Strava and Apple Health synchronization
Display—1.47-inch AMOLED touchscreen; 480 × 480
Case / strap—Silver stainless steel case; brown leather strap
Size / weight—46 × 46 × 11.28mm; 48.5g watch body only
Wrist range—135–205mm
Positioning—Five-system independent dual-band GNSS
Fitness—100+ fitness modes; ten running courses
Connection / calls—Bluetooth 5.2 + BLE; paired-phone Bluetooth calling
Battery—500mAh; up to 14 days under typical-use test conditions
Charging—Wireless dock; up to approximately 85 minutes with suitable QC3.0 equipment under test conditions
Compatibility—Android 6.0+; iOS 11+; Mi Fitness
Water resistance—5ATM watch; protect leather strap from water
Package—Watch, wireless charging dock including charging cable, user manual including warranty notice
Model numbers—M2135W1, M2134W1
Network speed—No

Similarities

  • Both use Bluetooth 5.2.
  • Both have NFC.
  • Both are water resistant to 50 m.
  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both have similar screen sizes (1.5 and 1.47 inches).

In summary

Get the Xiaomi Watch S1 Pro if you want longer battery life and a choice of Android phone or iPhone, or the OnePlus Watch 4 if you would rather have a bigger battery and a brighter screen for outdoor use.

Back to compared products ↑

In-stock alternatives

Samsung Galaxy Watch 8 ClassicFor OnePlus Watch 4Samsung Galaxy Watch 8 ClassicView product ↗Amazfit Balance 2For OnePlus Watch 4Amazfit Balance 2View product ↗Apple Watch SE 3For Xiaomi Watch S1 ProApple Watch SE 3View product ↗WHOOP ONE 5.0 SensorFor Xiaomi Watch S1 ProWHOOP ONE 5.0 SensorView product ↗

Related comparisons

Google Pixel Watch 3OnePlus Watch 4Samsung Galaxy Watch 8 ClassicOnePlus Watch 4WHOOP ONE 5.0 SensorOnePlus Watch 4OnePlus Watch 3OnePlus Watch 4Samsung Galaxy Watch 9 40mmOnePlus Watch 4Amazfit Balance 2OnePlus Watch 4Huawei Watch GT Runner 2OnePlus Watch 4Apple Watch SE 3OnePlus Watch 4OnePlus Watch 4Huawei Watch 6 46 mm
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