OnePlus Watch 4 Customer Reviews
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OnePlus Watch 4
Samsung Galaxy Watch 8 Classic
Samsung Galaxy Watch 9 40mm
Amazfit Balance 2| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Brand | OnePlus | Samsung | Samsung | Amazfit |
| Model | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 (40 mm and 44 mm configurations) | Amazfit Balance 2 |
| Announced | 2026, April 22 | 2025, July 09 | 2026, July 22 | June 24, 2025 |
| Dimensions | 47.4 × 47.4 × 11.0 mm | 46.4 × 46.0 × 10.6 mm | 44 mm: 46.0 × 43.7 × 8.6 mm; 40 mm: 42.7 × 40.4 × 8.6 mm | 47.4 × 47.4 × 12.3 mm without heart-rate sensor base |
| Weight | Approximately 43 g without strap; 68 g with strap | 63.5 g without band | 44 mm: 34.0 g; 40 mm: 31.5 g, without band | 43 g without strap |
| Build materials | Titanium-alloy case; PA and fibreglass back | Stainless-steel case | Aluminum case | Aluminum-alloy frame; fibre-reinforced polymer case |
| Wrist size | 140–210 mm | Not specified | Not specified | 140–210 mm |
| Strap / band | Fluororubber | Not specified | Lightweight breathable Sport Band with Dynamic Lug System | 22 mm silicone; pin buckle; standard and accessory straps |
| Controls / buttons | Not specified | Rotating bezel; Quick Button; Home and Back buttons | Touchscreen and two side buttons | Two physical buttons and touchscreen |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Display | 1.5-inch LTPO OLED | 1.34-inch Super AMOLED | 44 mm: 1.47-inch Super AMOLED; 40 mm: 1.34-inch Super AMOLED | 1.5-inch AMOLED |
| Screen resolution | 466 × 466 pixels; 310 ppi | 438 × 438 pixels | 44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels | 480 × 480 pixels; 323 ppi |
| Display protection | Sapphire crystal | Sapphire crystal | Sapphire crystal | Sapphire glass |
| Display features | 600 nits (typ), 1600 nits (HBM), 3000 nits (peak) | Full-colour always-on display | 3000 nits (peak) | Not specified |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Processor | Qualcomm Snapdragon W5; BES2800 MCU | Exynos W1000, 3 nm | Qualcomm Snapdragon Wear Elite, 3 nm | Not specified |
| RAM | 2 GB | 2 GB | 2 GB | Not specified |
| Storage | 32 GB | 64 GB | 32 GB | 32GB |
| Operating system | OxygenOS Watch 8; Wear OS 6.0 | Wear OS 6; One UI 8 Watch | Wear OS 7; One UI 9 Watch | Zepp OS 6 |
| CPU | Not specified | 5-core | 5-core | Not specified |
| GPU | Not specified | Mali-G68 | Not specified | Not specified |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Network / cellular | No cellular connectivity | GSM / HSPA / LTE | GSM / HSPA / LTE | Not specified |
| SIM / eSIM | Unsupported | eSIM | eSIM | Not specified |
| Wi-Fi | Wi-Fi 2.4 GHz + 5 GHz | Wi-Fi 2.4 GHz + 5 GHz | Wi-Fi 2.4 GHz + 5 GHz | Wi-Fi 2.4 GHz |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.3 | Bluetooth 5.3 | Bluetooth 5.2 BLE |
| NFC | Supported | Supported | Supported | Not specified |
| Positioning / GNSS | Dual-frequency L1 + L5; GPS; BeiDou; Galileo; GLONASS; QZSS | Dual-frequency GPS, L1 + L5; GLONASS; BeiDou; Galileo | Dual-frequency GPS, L1 + L5 | Dual-band GNSS; circularly polarized antenna; 6 satellite systems |
| Satellite features | Not specified | Not specified | Not specified | No |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Speaker | Supported | Supported | Supported | Two speakers |
| Microphone | Supported | Supported | Supported | Supported |
| Calling | Bluetooth calling with a connected smartphone | Bluetooth calling with a connected smartphone; standalone calling on LTE editions | Bluetooth calling with a connected smartphone; standalone calling on LTE editions | Bluetooth calling |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Sensors | Accelerometer; gyroscope; optical heart-rate sensor; optical blood-oxygen sensor; geomagnetic sensor; ambient-light sensor; barometer; wrist-temperature sensor | Samsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensor; 3D Hall sensor | Samsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensor | BioTracker 6.0 PPG; 5 PD + 2 LED; accelerometer; gyroscope; barometer; ambient light; geomagnetic sensor; temperature |
| Health & wellness features | Heart rate; high and low heart-rate alerts; SpO₂ spot checks and all-day monitoring; stress; breathing exercises; cycle tracking; 60-second Wellness Overview | Heart and wellness tracking; Antioxidant Index, Vascular Load, Energy Score and stress features. Availability varies by market and paired phone. | Heart rate; SpO₂; ECG; body composition; temperature; stress; Vitals; Heart Health Score | 24-hour heart rate, SpO₂ and stress; one-tap measurement; high and low heart-rate alerts; low SpO₂ alerts; breathing exercises; PAI; heart-rate recovery; menstrual-cycle tracking; HybridCharge |
| Sleep tracking | Deep, light and REM sleep; awake time; sleep score; breathing rate; SpO₂; snoring-risk assessment | Sleep tracking, sleep coaching, Bedtime Guidance and sleep-apnoea features where available | Sleep-stage tracking; sleep-apnea risk detection; sleep Vitals | Sleep HRV; sleep stages including REM; naps; sleep schedule; breathing quality; sleep score |
| Sports / workout modes | 100+ sports modes | Not specified | Automatic and manual workout tracking across running, walking, cycling, swimming and other activities | 180+ sports modes |
| Training & outdoor features | Aerobic training effect; cardiorespiratory capacity; recovery time; heart-rate recovery; running form; track running | Running Coach and dual-frequency route tracking | Daily Cardio Load; Fitness Index; workout and recovery guidance | Zepp Coach; PeakBeats; HybridCharge; training and interval templates; HYROX templates and Virtual Pace; track running; trajectory correction; virtual pacer; offline maps; golf and ski maps |
| Safety & emergency features | Fall detection; emergency rescue | Not specified | Fall detection and Emergency SOS | Not specified |
| Diving / depth features | Not specified | Not specified | Not specified | Scuba-diving support; follow the manufacturer’s dive-mode limits and safety guidance |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Battery capacity | 646 mAh typical; 632 mAh rated | 445 mAh | 44 mm: 445 mAh; 40 mm: 390 mAh | 658 mAh rated |
| Battery life | Up to 5 days smart mode; 3 days heavy use; 16 days power saver | Always-On Display off: up to 40 hours Always-On Display on: up to 30 hours | Up to 30 hours with AOD on | 21 days typical; 10 days heavy; 33 hours accurate GPS; 67 hours GPS power saver |
| Charging | Charging base with USB-C cable | Fast wireless charging, WPC-based | Fast wireless charging, WPC-based | Magnetic charging head |
| Water resistance | 5 ATM; IP69; IP68 | 5 ATM; IP68 | 5 ATM; IP68 | 10 ATM |
| Durability / certifications | MIL-STD-810H | MIL-STD-810H | MIL-STD-810H | MIL-STD-810G-2014 low-pressure, temperature, shock, vibration and impact tests; TUV water-resistance report 68.189.25.0132.01 |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Phone compatibility | Android 9.0 or later; GMS 23.45.23 or later | Android 12.0 or later; more than 1.5 GB RAM | Android 13.0 or later; more than 1.5 GB RAM; Google Mobile Services | Android 7 or later; iOS 15 or later |
| Companion app | OHealth | Galaxy Wearable; Samsung Health | Galaxy Wearable; Samsung Health | Zepp |
| Colors | Midnight Titanium; Evergreen Titanium | Black; White | 44 mm: Graphite, Silver; 40 mm: Graphite, Cream | Black; Lava accessory strap |
| Specification | OnePlus Watch 4 | Samsung Galaxy Watch 8 Classic | Samsung Galaxy Watch 9 40mm | Amazfit Balance 2 |
|---|---|---|---|---|
| Case material | Titanium alloy | Stainless steel | Aluminum | Aluminum alloy; fibre-reinforced polymer |
| Pixels per inch | 310 ppi | Not specified | Not specified | 323 ppi |
| Peak brightness | 600 nits typical; 1,500 nits high-brightness mode; 3,000 nits peak in supported sports modes | 3,000 nits peak | 3,000 nits peak | 2,000 nits peak |
| Charging time | Approximately 75 minutes | Not specified | 44 mm: 100% in 90 minutes, 45% in 30 minutes; 40 mm: 100% in 80 minutes, 50% in 30 minutes | Not specified |
| Packing list | Watch; charging base; strap; USB-C cable; user guide; safety and warranty booklet | Not specified | Not specified | Watch with standard strap; magnetic charging head; instruction manual |
| Smart recognition | Running; walking; cycling; swimming; rowing machine; elliptical | Not specified | Not specified | 25 strength-training movements; 8 sports movements |
| Release status | Available. Released 2026, April | Available. Released 2025, July 25 | Available. Released 2026, August 07 | Not specified |
| Card slot | No | No | No | Not specified |
| Camera | No | No | No | Not specified |
| 3.5 mm headphone jack | No | No | No | Not specified |
| USB | No | No | No | Not specified |
| Radio | No | No | No | Not specified |
| Maximum charging power | Approximately 7.5 W | Not specified | Not specified | Not specified |
| Operating temperature | 0–35 °C | Not specified | Not specified | Not specified |
| Model numbers | Not specified | SM-L500, SM-L505U | SM-L340, SM-L350, SM-L345F, SM-L355F, SM-L345U, SM-L355U | Not specified |
| 2G bands | Not specified | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | Not specified |
| 3G bands | Not specified | HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 2100 | Not specified |
| 4G bands | Not specified | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 40, 66, 71 | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66, 71 | Not specified |
| Network speed | Not specified | HSPA, LTE | HSPA, LTE | Not specified |
| SAR (US) | Not specified | 1.04 W/kg (head) 0.41 W/kg (body) | 1.06 W/kg (body) | Not specified |
| SAR (EU) | Not specified | 0.03 W/kg (head) 0.67 W/kg (body) | 0.70 W/kg (body) | Not specified |
| Additional durability features | Not specified | Rotating bezel | Armor Aluminum 2 | Not specified |
| Third-party fitness apps | Not specified | Not specified | Not specified | Runna; Strava; TrainingPeaks; Intervals.icu; Google Fit; Apple Health |
OnePlus Watch 4 specifications
| Brand | OnePlus |
|---|---|
| Model | OnePlus Watch 4 |
| Announced | 2026, April 22 |
| Dimensions | 47.4 × 47.4 × 11.0 mm |
| Weight | Approximately 43 g without strap; 68 g with strap |
| Build materials | Titanium-alloy case; PA and fibreglass back |
| Wrist size | 140–210 mm |
| Strap / band | Fluororubber |
| Display | 1.5-inch LTPO OLED |
|---|---|
| Screen resolution | 466 × 466 pixels; 310 ppi |
| Display protection | Sapphire crystal |
| Display features | 600 nits (typ), 1600 nits (HBM), 3000 nits (peak) |
| Pixels per inch | 310 ppi |
| Peak brightness | 600 nits typical; 1,500 nits high-brightness mode; 3,000 nits peak in supported sports modes |
| Processor | Qualcomm Snapdragon W5; BES2800 MCU |
|---|---|
| RAM | 2 GB |
| Storage | 32 GB |
| Operating system | OxygenOS Watch 8; Wear OS 6.0 |
| Network / cellular | No cellular connectivity |
|---|---|
| SIM / eSIM | Unsupported |
| Wi-Fi | Wi-Fi 2.4 GHz + 5 GHz |
| Bluetooth | Bluetooth 5.2 |
| NFC | Supported |
| Positioning / GNSS | Dual-frequency L1 + L5; GPS; BeiDou; Galileo; GLONASS; QZSS |
| USB | No |
| Radio | No |
| Speaker | Supported |
|---|---|
| Microphone | Supported |
| Calling | Bluetooth calling with a connected smartphone |
| Sensors | Accelerometer; gyroscope; optical heart-rate sensor; optical blood-oxygen sensor; geomagnetic sensor; ambient-light sensor; barometer; wrist-temperature sensor |
|---|---|
| Health & wellness features | Heart rate; high and low heart-rate alerts; SpO₂ spot checks and all-day monitoring; stress; breathing exercises; cycle tracking; 60-second Wellness Overview |
| Sleep tracking | Deep, light and REM sleep; awake time; sleep score; breathing rate; SpO₂; snoring-risk assessment |
| Sports / workout modes | 100+ sports modes |
| Training & outdoor features | Aerobic training effect; cardiorespiratory capacity; recovery time; heart-rate recovery; running form; track running |
| Safety & emergency features | Fall detection; emergency rescue |
| Battery capacity | 646 mAh typical; 632 mAh rated |
|---|---|
| Battery life | Up to 5 days smart mode; 3 days heavy use; 16 days power saver |
| Charging | Charging base with USB-C cable |
| Water resistance | 5 ATM; IP69; IP68 |
| Durability / certifications | MIL-STD-810H |
| Phone compatibility | Android 9.0 or later; GMS 23.45.23 or later |
|---|---|
| Companion app | OHealth |
| Colors | Midnight Titanium; Evergreen Titanium |
| Case material | Titanium alloy |
|---|
| Charging time | Approximately 75 minutes |
|---|
| Packing list | Watch; charging base; strap; USB-C cable; user guide; safety and warranty booklet |
|---|
| Smart recognition | Running; walking; cycling; swimming; rowing machine; elliptical |
|---|
| Release status | Available. Released 2026, April |
|---|---|
| Maximum charging power | Approximately 7.5 W |
| Operating temperature | 0–35 °C |
| Card slot | No |
|---|
| Camera | No |
|---|
| 3.5 mm headphone jack | No |
|---|
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