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2026 comparison
Updated Jan 7, 2026
|Sources: Amazon, ManufacturerSamsung Galaxy Watch Ultra vs OnePlus Watch 2
The Samsung Galaxy Watch Ultra is the flagship option here, and it shines with a rugged 47mm Grade 4 Titanium build and a stunning 3000-nit Super AMOLED display. In real-world use, its 590mAh battery lasts up to 100 hours in power-saving mode, making it a powerhouse for outdoor adventures. The OnePlus Watch 2 offers a sleek stainless steel chassis and sapphire crystal standard, delivering a premium feel. However, with a 500mAh battery, it also manages to provide up to 100 hours, but lacks the LTE option. If you're looking for durability and exclusive health features, the Galaxy Watch Ultra might be worth the extra cash in 2026.
⚖️ Weight: 2.13 oz vs 1.73 oz🌊 Water Resistance: 10 ATM vs 5 ATM🔋 Battery: 590mAh vs 500mAh
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Samsung Galaxy Watch Ultra
★4.4
(243)•Amazon
Compatibility:Android 11.0 or higher with 1.5GB+ RAM; Samsung Galaxy phone required for Energy Score, ECG, Sleep Apnea, and IHRN features
Operating System:Wear OS 5 powered by Samsung (One UI 6 Watch)
Case Size:47.4mm H x 47.1mm W x 12.1mm D
Case Material:Titanium (Grade 4) frame with cushion design; Sapphire Crystal glass
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OnePlus Watch 2
★4.6
(538)•Amazon
Compatibility:Android 8.0+ only (requires GMS 23.45.23+); iOS and Android Go edition NOT supported
Operating System:Wear OS 4 + RTOS (Dual-Engine Architecture)
Case Size:47mm (47.0 x 46.6 x 12.1 mm / 1.85 x 1.83 x 0.47 in)
Case Material:Chassis: Stainless steel; Bottom: Plastic (PC/PC+glass fiber); Cover: 2.5D Sapphire Crystal
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Key spec differences
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
Winner= clear advantage
Spec
Samsung Galaxy Watch Ultra
OnePlus Watch 2
Display2 specs
Display SizeKey
Samsung Galaxy Watch Ultra
1.5 in (37.3 mm) circular display
OnePlus Watch 2
1.43 in (3.63 cm)
Resolution
Samsung Galaxy Watch Ultra
480 x 480 pixels
OnePlus Watch 2
466 x 466 pixels (326 ppi); 600 nits default brightness
Performance1 specs
Storage
Samsung Galaxy Watch Ultra
32GB
OnePlus Watch 2
32 GB ROM + 2 GB RAM (Approx. 4GB reserved for RTOS)
Battery1 specs
Battery CapacityKey
Samsung Galaxy Watch Ultra
590mAh; Up to 100 hours (Power Saving); Up to 60 hours (Normal use, AOD off); Up to 48 hours (Exercise Power Saving)
OnePlus Watch 2
500 mAh; Up to 100 hours (Smart Mode); Up to 48 hours (Heavy Use); Up to 12 days (Power Saver Mode)
Design2 specs
Weight
Samsung Galaxy Watch Ultra
60.5 g (Body only)
OnePlus Watch 2
49 g (Watch only) / 80 g (with Fluororubber strap)Winner
Water Resistance
Samsung Galaxy Watch Ultra
10 ATM + IP68 (ISO 22810 standard); Ocean swimming capable
OnePlus Watch 2
5 ATM (50 m) + IP68 (1.5m for 30 min)
Software1 specs
Operating System
Samsung Galaxy Watch Ultra
Wear OS 5 powered by Samsung (One UI 6 Watch)
OnePlus Watch 2
Wear OS 4 + RTOS (Dual-Engine Architecture)
Connectivity1 specs
Connectivity
Samsung Galaxy Watch Ultra
LTE (eSIM standard on all models); Wi-Fi 2.4+5GHz; Bluetooth 5.3; NFC
OnePlus Watch 2
Bluetooth 5.0, Wi-Fi 2.4GHz/5GHz (802.11 a/b/g/n)
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Expand
Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Samsung Galaxy Watch Ultra vs OnePlus Watch 2
Samsung Galaxy Watch Ultra
★4.4(243)Amazon
OnePlus Watch 2
★4.6(538)Amazon
| Criterion | Samsung Galaxy Watch Ultra | OnePlus Watch 2 |
|---|---|---|
| Rating | ★4.4(243)Amazon | ★4.6(538)Amazon |
Compatibility | Android 11.0 or higher with 1.5GB+ RAM; Samsung Galaxy phone required for Energy Score, ECG, Sleep Apnea, and IHRN features | Android 8.0+ only (requires GMS 23.45.23+); iOS and Android Go edition NOT supported |
Operating System | Wear OS 5 powered by Samsung (One UI 6 Watch) | Wear OS 4 + RTOS (Dual-Engine Architecture) |
Case Size | 47.4mm H x 47.1mm W x 12.1mm D | 47mm (47.0 x 46.6 x 12.1 mm / 1.85 x 1.83 x 0.47 in) |
Case Material | Titanium (Grade 4) frame with cushion design; Sapphire Crystal glass | Chassis: Stainless steel; Bottom: Plastic (PC/PC+glass fiber); Cover: 2.5D Sapphire Crystal |
Display Type | Super AMOLED; Always-On Display; Peak brightness 3000 nits | AMOLED touchscreen |
Display Size | 1.5 in (37.3 mm) circular display | 1.43 in (3.63 cm) |
Resolution | 480 x 480 pixels | 466 x 466 pixels (326 ppi); 600 nits default brightness |
Always On Display | Yes | Yes |
Water Resistance | 10 ATM + IP68 (ISO 22810 standard); Ocean swimming capable | 5 ATM (50 m) + IP68 (1.5m for 30 min) |
Durability | MIL-STD-810H certified; Operating temp -20°C to 55°C; 9000m altitude resistance | MIL-STD-810H certified; Sapphire crystal face; Operating temp: -20°C to 55°C |
GPS | Dual-frequency GPS (L1+L5); Glonass; Beidou; Galileo | Dual-frequency L1 + L5; Beidou, GPS, Galileo, GLONASS, QZSS |
Connectivity | LTE (eSIM standard on all models); Wi-Fi 2.4+5GHz; Bluetooth 5.3; NFC | Bluetooth 5.0, Wi-Fi 2.4GHz/5GHz (802.11 a/b/g/n) |
NFC Payments | Samsung Wallet / Google Wallet | Yes (Google Wallet) |
Sensors | Samsung BioActive Sensor (Optical Bio-signal + Electrical Heart + Bioelectrical Impedance Analysis); Temperature sensor; Accelerometer; Barometer; Gyro sensor; Geomagnetic sensor; Light sensor | Optical heart rate; optical pulse oximeter (SpO2); accelerometer; gyroscope; geomagnetic sensor; light sensor; barometer |
Health Features | Energy Score; Sleep Apnea detection (FDA authorized); AGEs Index; Body Composition; ECG; Irregular Heart Rhythm Notification; Cycle Tracking with skin temperature; Sleep coaching | Sleep tracking (stages, score, snoring risk); OHealth breathing training; stress monitoring; heart rate (high/low alerts, resting); blood oxygen (SpO2) |
Workout Modes | Multisport tile (Triathlon/Duathlon/Aquathlon); Functional Threshold Power (FTP) for cycling; Race Partner; Track Back; Custom workouts via Quick Button | 100+ sports modes; 6 auto-detection modes (running, walking, cycling, swimming, rowing, elliptical); professional analysis for running, tennis, skiing |
Storage | 32GB | 32 GB ROM + 2 GB RAM (Approx. 4GB reserved for RTOS) |
Speaker Mic | Speaker (with Siren support); Microphone | Yes (Built-in speaker and microphone) |
Calls | Yes (LTE standalone or via paired phone) | Yes (Bluetooth calling supported in Smart and Power Saver modes) |
Battery | 590mAh; Up to 100 hours (Power Saving); Up to 60 hours (Normal use, AOD off); Up to 48 hours (Exercise Power Saving) | 500 mAh; Up to 100 hours (Smart Mode); Up to 48 hours (Heavy Use); Up to 12 days (Power Saver Mode) |
Charging | Fast Wireless Charging (WPC Inductive); Proprietary puck required for max speed | VOOC Fast Charging (7.5W); 100% in 60 mins; 1 day power in 10 mins |
Weight | 60.5 g (Body only) | 49 g (Watch only) / 80 g (with Fluororubber strap) |
Band Sizes | One Size (fits 145–205mm wrists via Dynamic Lug System) | Fits wrist sizes 140–210 mm; standard 22 mm quick-release width |
Extras | Quick Button (customizable); 86dB Emergency Siren; Night Mode watch face; Gesture controls (Double Pinch) | Dual-Engine architecture (Snapdragon W5 + BES2700); Google Play Store; Google Maps; Google Assistant; Flashlight; Compass; Media controls |
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Samsung Galaxy Watch Ultra
Rating:★4.4(243)Amazon
Compatibility:Android 11.0 or higher with 1.5GB+ RAM; Samsung Galaxy phone required for Energy Score, ECG, Sleep Apnea, and IHRN features
Operating System:Wear OS 5 powered by Samsung (One UI 6 Watch)
Case Size:47.4mm H x 47.1mm W x 12.1mm D
Case Material:Titanium (Grade 4) frame with cushion design; Sapphire Crystal glass
Display Type:Super AMOLED; Always-On Display; Peak brightness 3000 nits
Display Size:1.5 in (37.3 mm) circular display
Resolution:480 x 480 pixels
Always On Display:Yes
Water Resistance:10 ATM + IP68 (ISO 22810 standard); Ocean swimming capable
Durability:MIL-STD-810H certified; Operating temp -20°C to 55°C; 9000m altitude resistance
GPS:Dual-frequency GPS (L1+L5); Glonass; Beidou; Galileo
Connectivity:LTE (eSIM standard on all models); Wi-Fi 2.4+5GHz; Bluetooth 5.3; NFC
NFC Payments:Samsung Wallet / Google Wallet
Sensors:Samsung BioActive Sensor (Optical Bio-signal + Electrical Heart + Bioelectrical Impedance Analysis); Temperature sensor; Accelerometer; Barometer; Gyro sensor; Geomagnetic sensor; Light sensor
Health Features:Energy Score; Sleep Apnea detection (FDA authorized); AGEs Index; Body Composition; ECG; Irregular Heart Rhythm Notification; Cycle Tracking with skin temperature; Sleep coaching
Workout Modes:Multisport tile (Triathlon/Duathlon/Aquathlon); Functional Threshold Power (FTP) for cycling; Race Partner; Track Back; Custom workouts via Quick Button
Storage:32GB
Speaker Mic:Speaker (with Siren support); Microphone
Calls:Yes (LTE standalone or via paired phone)
Battery:590mAh; Up to 100 hours (Power Saving); Up to 60 hours (Normal use, AOD off); Up to 48 hours (Exercise Power Saving)
Charging:Fast Wireless Charging (WPC Inductive); Proprietary puck required for max speed
Weight:60.5 g (Body only)
Band Sizes:One Size (fits 145–205mm wrists via Dynamic Lug System)
Extras:Quick Button (customizable); 86dB Emergency Siren; Night Mode watch face; Gesture controls (Double Pinch)
✓ Pros:
- • True multi-day battery life (up to 100h in power saving)
- • Extremely durable Grade 4 Titanium build with 10ATM rating
- • Dual-frequency GPS (L1+L5) provides superior tracking accuracy
- • Brightest display in class (3000 nits) for outdoor visibility
- • Exclusive features like Siren and Multisport tile for triathletes
✗ Cons:
- • Large 47mm square-circle design may not fit smaller wrists
- • Key health features (ECG, Sleep Apnea) locked to Samsung phones
- • Proprietary band attachment (Dynamic Lug) limits third-party options
- • Charging speed is slower (~2 hours) compared to competitors
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OnePlus Watch 2
Rating:★4.6(538)Amazon
Compatibility:Android 8.0+ only (requires GMS 23.45.23+); iOS and Android Go edition NOT supported
Operating System:Wear OS 4 + RTOS (Dual-Engine Architecture)
Case Size:47mm (47.0 x 46.6 x 12.1 mm / 1.85 x 1.83 x 0.47 in)
Case Material:Chassis: Stainless steel; Bottom: Plastic (PC/PC+glass fiber); Cover: 2.5D Sapphire Crystal
Display Type:AMOLED touchscreen
Display Size:1.43 in (3.63 cm)
Resolution:466 x 466 pixels (326 ppi); 600 nits default brightness
Always On Display:Yes
Water Resistance:5 ATM (50 m) + IP68 (1.5m for 30 min)
Durability:MIL-STD-810H certified; Sapphire crystal face; Operating temp: -20°C to 55°C
GPS:Dual-frequency L1 + L5; Beidou, GPS, Galileo, GLONASS, QZSS
Connectivity:Bluetooth 5.0, Wi-Fi 2.4GHz/5GHz (802.11 a/b/g/n)
NFC Payments:Yes (Google Wallet)
Sensors:Optical heart rate; optical pulse oximeter (SpO2); accelerometer; gyroscope; geomagnetic sensor; light sensor; barometer
Health Features:Sleep tracking (stages, score, snoring risk); OHealth breathing training; stress monitoring; heart rate (high/low alerts, resting); blood oxygen (SpO2)
Workout Modes:100+ sports modes; 6 auto-detection modes (running, walking, cycling, swimming, rowing, elliptical); professional analysis for running, tennis, skiing
Storage:32 GB ROM + 2 GB RAM (Approx. 4GB reserved for RTOS)
Speaker Mic:Yes (Built-in speaker and microphone)
Calls:Yes (Bluetooth calling supported in Smart and Power Saver modes)
Battery:500 mAh; Up to 100 hours (Smart Mode); Up to 48 hours (Heavy Use); Up to 12 days (Power Saver Mode)
Charging:VOOC Fast Charging (7.5W); 100% in 60 mins; 1 day power in 10 mins
Weight:49 g (Watch only) / 80 g (with Fluororubber strap)
Band Sizes:Fits wrist sizes 140–210 mm; standard 22 mm quick-release width
Extras:Dual-Engine architecture (Snapdragon W5 + BES2700); Google Play Store; Google Maps; Google Assistant; Flashlight; Compass; Media controls
✓ Pros:
- • Groundbreaking 100-hour battery life for a full-featured Wear OS watch
- • Premium build with stainless steel chassis and sapphire crystal standard
- • Dual-frequency GPS (L1+L5) ensures high accuracy in urban environments
- • Fast charging provides a full day's power in just 10 minutes
- • Fluid performance via Snapdragon W5 Gen 1 processor
✗ Cons:
- • Available in only one large size (47mm), which may not fit small wrists
- • No LTE/Cellular option available
- • Strictly incompatible with iOS (iPhone)
- • Crown rotates but does not function for scrolling menus
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Which one is better?
The Samsung Galaxy Watch Ultra is the better buy for most people - its 590mAh battery with a 100-hour lifespan crushes the OnePlus Watch 2.
Who should buy each?
Choose the Samsung Galaxy Watch Ultra if: you need multi-day battery life for long hikes, you want a durable smartwatch for outdoor sports, or you use Samsung's health features extensively. (2.13 oz weight)
Choose the OnePlus Watch 2 if: you want a stylish smartwatch for daily wear, you prioritize fast charging for quick power-ups, or you prefer a lighter watch that still offers great battery life. (1.73 oz weight)
Conclusion
There is no wrong answer here. Focus on the features you will use daily and pick the model that aligns with them.
Frequently Asked Questions
+Which has better value?
Samsung Galaxy Watch Ultra excels if you value true multi-day battery life (up to 100h in power saving). OnePlus Watch 2 is better if you prioritize groundbreaking 100-hour battery life for a full-featured wear os watch. Pick based on your budget and daily use.
+Is this an independent review?
Yes. We use affiliate links for monetization, but recommendations are research-driven and unbiased.
+Do newer models exist?
Check release timelines from the manufacturers and compare pricing before you buy. We refresh this page when major updates land.
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