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Wearable comparison

Apple Watch SE 3 vs OnePlus Watch 4

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Apple Watch SE 3

Apple Watch SE 3

  • Screen: 40mm: 324 × 394 pixels; 44mm: 368 × 448 pixels.
  • Apple S10; 4-core Neural Engine processor.
  • 64 GB storage in this version.
  • Runs watchOS 26, upgradable to watchOS 27.
  • Wi-Fi 4 support.
KSh 37,500In Stock
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02
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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WHOOP ONE 5.0 SensorKSh 37,000
Google Pixel Watch 3KSh 37,500
Apple Watch Series 9KSh 45,000
Xiaomi Watch S1 ProKSh 38,380
Amazfit GTR 3 ProKSh 20,000
Apple Watch Series 8KSh 50,000
Apple Watch SE 2KSh 28,500
2 of 4 products

Our quick verdict

The Apple Watch SE 3 runs watchOS built around the iPhone, is lighter to wear all day and has more storage (64 GB) and faster recharging (45 minutes), though it works only with an iPhone, while the OnePlus Watch 4 lasts much longer between charges (5 days vs 18 hours) and has a brighter, sharper screen and a premium titanium build.

Display

Apple Watch SE 3
40mm: 324 × 394 pixels; 44mm: 368 × 448 pixels
OnePlus Watch 4
466 × 466 pixels; 310 ppi

Performance

Apple Watch SE 3
Apple S10; 4-core Neural Engine processor
OnePlus Watch 4
Qualcomm Snapdragon W5; BES2800 MCU processor

Storage

Apple Watch SE 3
64 GB storage in this version
OnePlus Watch 4
32 GB storage in this version

Software

Apple Watch SE 3
Runs watchOS 26, upgradable to watchOS 27
OnePlus Watch 4
Runs OxygenOS Watch 8; Wear OS 6.0

Battery life

Apple Watch SE 3
Up to 18 hours per charge
OnePlus Watch 4
646 mAh battery

Key differences

The main differences to help you choose.

Apple Watch SE 3

  • Lighter: 26.3 g (vs 68 g).
  • More storage: 64 GB (vs 32 GB).
  • Recharges faster: 45 minutes (vs 1.25 hours).
  • eSIM.
  • Cellular option (LTE/5G models) for calls and data without your phone.

OnePlus Watch 4

  • Longer battery life: up to 5 days (vs 18 hours).
  • Brighter display: up to 3,000 nits (vs 1,000).
  • Titanium case (vs aluminium case).
  • Higher screen resolution: 466 × 466 (vs 324 × 394).

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
PriorityApple Watch SE 3OnePlus Watch 4
Battery lifeUp to 18 hours per charge646 mAh battery
Storage64 GB storage32 GB storage
DisplayOLED display1.5-inch OLED display, 310 ppi
PerformanceApple S10 processorQualcomm Snapdragon W5 processor
SoftwarewatchOS 26OxygenOS Watch 8
Water resistance50 mIP69 water and dust resistance

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
DisplayAlways-On Retina LTPO OLED1.5-inch LTPO OLED
Screen resolution40mm: 324 × 394 pixels; 44mm: 368 × 448 pixels466 × 466 pixels; 310 ppi
Display protectionIon-X glassSapphire crystal
Display features1000 nits (peak)600 nits (typ), 1600 nits (HBM), 3000 nits (peak)

Connectivity

Connectivity specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
Network / cellularGSM / HSPA / LTE / 5GNo cellular connectivity
SIM / eSIMeSIMUnsupported
Wi-FiWi-Fi 802.11 b/g/nWi-Fi 2.4 GHz + 5 GHz
Bluetooth5.3, A2DP, LEBluetooth 5.2
NFCSupported; Apple PaySupported
Positioning / GNSSGPS, GLONASS, GALILEO, QZSSDual-frequency L1 + L5; GPS; BeiDou; Galileo; GLONASS; QZSS

Identity & design

Identity & design specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
BrandAppleOnePlus
ModelApple Watch SE 3OnePlus Watch 4
Announced2025, September 092026, April 22
Dimensions40mm: 40 × 34 × 10.7 mm; 44mm: 44 × 38 × 10.7 mm47.4 × 47.4 × 11.0 mm
Weight40mm: GPS 26.3 g, GPS + Cellular 26.4 g; 44mm: GPS 32.9 g, GPS + Cellular 33.0 gApproximately 43 g without strap; 68 g with strap
Build materialsAluminum caseTitanium-alloy case; PA and fibreglass back
Wrist size40mm: 130–200 mm; 44mm: 140–245 mm140–210 mm
Controls / buttonsDigital Crown with haptic feedback; side button—
Strap / band—Fluororubber

Performance & software

Performance & software specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
ProcessorApple S10; 4-core Neural EngineQualcomm Snapdragon W5; BES2800 MCU
CPU64-bit dual-core—
GPUPowerVR—
Storage64 GB32 GB
Operating systemwatchOS 26, upgradable to watchOS 27OxygenOS Watch 8; Wear OS 6.0
RAM—2 GB

Audio & communication

Audio & communication specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth calling; cellular calling on GPS + Cellular modelsBluetooth calling with a connected smartphone

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
SensorsSecond-generation optical heart sensor; temperature sensor; compass; always-on altimeter; high-g accelerometer; high-dynamic-range gyroscope; ambient light sensorAccelerometer; gyroscope; optical heart-rate sensor; optical blood-oxygen sensor; geomagnetic sensor; ambient-light sensor; barometer; wrist-temperature sensor
Health & wellness featuresHigh and low heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle tracking; mindfulness and medications appsHeart rate; high and low heart-rate alerts; SpO₂ spot checks and all-day monitoring; stress; breathing exercises; cycle tracking; 60-second Wellness Overview
Sleep trackingSleep duration and sleep stagesDeep, light and REM sleep; awake time; sleep score; breathing rate; SpO₂; snoring-risk assessment
Sports / workout modesWorkout app with multiple workout types and automatic workout detection100+ sports modes
Training & outdoor featuresPace and heart-rate zones; compass waypoints and backtrackAerobic training effect; cardiorespiratory capacity; recovery time; heart-rate recovery; running form; track running
Safety & emergency featuresEmergency SOS; international emergency calling; Fall Detection; Crash DetectionFall detection; emergency rescue

Battery & durability

Battery & durability specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
Battery lifeUp to 18 hours normal use; 32 hours Low Power Mode; 7 hours outdoor workoutUp to 5 days smart mode; 3 days heavy use; 16 days power saver
ChargingMagnetic fast chargingCharging base with USB-C cable
Water resistance50 m; swimproof5 ATM; IP69; IP68
Battery capacity—646 mAh typical; 632 mAh rated
Durability / certifications—MIL-STD-810H

Compatibility

Compatibility specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
Phone compatibilityiPhone 11 or later, including iPhone SE (2nd generation or later); iOS 26 or laterAndroid 9.0 or later; GMS 23.45.23 or later
Companion appApple Watch app on iPhoneOHealth
ColorsMidnight, StarlightMidnight Titanium; Evergreen Titanium

Additional specifications

Additional specifications specifications comparison
SpecificationApple Watch SE 3OnePlus Watch 4
Pixels per inch326 ppi310 ppi
Peak brightnessUp to 1,000 nits600 nits typical; 1,500 nits high-brightness mode; 3,000 nits peak in supported sports modes
Cover / touchscreenSupported—
Charging timeAbout 45 minutes to 80%Approximately 75 minutes
Release statusAvailable. Released 2025, September 19Available. Released 2026, April
Model numbersA3325, A3324, A3328, A3326, A3327, A3329, A3391, A3392—
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
2G bandsGSM 850 / 900 / 1800 / 1900—
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK; HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada—
4G bands1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, HK; 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada—
5G bandsSA/NSA—
Network speedHSPA, LTE, 5G—
SAR (US)1.18 W/kg (head)—
SAR (EU)0.42 W/kg (head)—
Additional hardware featuresMedia playback—
Battery typeRechargeable lithium-ion—
Case material—Titanium alloy
Packing list—Watch; charging base; strap; USB-C cable; user guide; safety and warranty booklet
Smart recognition—Running; walking; cycling; swimming; rowing machine; elliptical
Maximum charging power—Approximately 7.5 W
Operating temperature—0–35 °C

Similarities

  • Both have NFC.
  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both connect over Bluetooth.
  • Both have a speaker.
  • Both have a microphone.

In summary

Get the OnePlus Watch 4 if you want much longer battery life and a brighter, sharper screen, or the Apple Watch SE 3 if you would rather have a lighter watch for all-day wear and more storage.

Back to compared products ↑

In-stock alternatives

Google Pixel Watch 3For Apple Watch SE 3Google Pixel Watch 3View product ↗WHOOP ONE 5.0 SensorFor Apple Watch SE 3WHOOP ONE 5.0 SensorView product ↗Samsung Galaxy Watch 8 ClassicFor OnePlus Watch 4Samsung Galaxy Watch 8 ClassicView product ↗Amazfit Balance 2For OnePlus Watch 4Amazfit Balance 2View product ↗

Related comparisons

WHOOP ONE 5.0 SensorApple Watch SE 3Google Pixel Watch 3Apple Watch SE 3Apple Watch Series 9Apple Watch SE 3Apple Watch SE 3Xiaomi Watch S1 Pro
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