OnePlus Watch 3 Review: The Best Android Smartwatch in 2025
At Technologies For Mobile, we judge smartwatches on three core pillars: design, battery life, and real-world usability. With the OnePlus Watch 3, OnePlus delivers a smartwatch that finally feels complete. In 2025, where most Wear OS watches still struggle with endurance, OnePlus takes a different route—focusing on efficiency, premium materials, and smooth performance.
The result is a smartwatch that many reviewers now call the best Android smartwatch of 2025 so far.
Design & Build: Premium and Purposeful
The OnePlus Watch 3 immediately stands out with its luxury-meets-rugged design.
Design Highlights
- Titanium bezel paired with a sapphire crystal display
- Stainless steel case for added durability
- Large 47mm dial, weighing around 81g with strap
- First-ever rotating crown on a OnePlus watch
The rotating crown significantly improves navigation, making scrolling through menus smooth and intuitive—something Wear OS users have long wanted. The build quality feels flagship-grade, backed by IP68 water resistance and MIL-STD-810H certification, making it suitable for both daily wear and outdoor activities.
That said, the bold size may feel chunky on smaller wrists, so this is clearly a watch designed for users who prefer a strong, sporty presence.
Battery & Performance: Where OnePlus Dominates
Battery life is where the OnePlus Watch 3 truly separates itself from the competition.
Performance Architecture
- Dual-chip system: Snapdragon W5 Gen 1 + BES co-processor
- Runs Wear OS 5 alongside RTOS
- 2GB RAM and 32GB storage
This dual-OS approach allows the watch to switch intelligently between performance and efficiency modes. Everyday interactions feel fluid, apps open quickly, and animations remain smooth.
Battery Life & Charging
- 631mAh silicon-carbon battery
- Best-in-class endurance for a Wear OS smartwatch
- Fast wired charging via USB-C
- ~80% in 30 minutes
- Full charge in about 1 hour
For users tired of charging their smartwatch daily, this alone makes the OnePlus Watch 3 extremely appealing.
Health, Fitness & Smart Features
OnePlus has taken health tracking seriously this time, offering a comprehensive sensor suite.
- Health Sensors
- Heart rate monitoring
- Multi-LED SpO₂
- Wrist temperature sensing
- ECG (available outside US/Canada)
- Vascular age tracking
- Stress monitoring
60-second health check
Fitness enthusiasts will appreciate the dual-band GPS (L1 + L5), which delivers accurate route tracking even in challenging environments like cities or dense areas.
Sleep tracking is reliable and detailed, though some users feel the sleep score system is stricter compared to rivals. Still, data accuracy remains strong and consistent.
Smartwatch Experience
Running Wear OS 5, the OnePlus Watch 3 supports a full ecosystem of Android apps, notifications, and Google services. Navigation feels smoother than ever thanks to the rotating crown, and the display remains sharp and readable in all conditions.
However, one limitation remains:
- No LTE support – the watch must stay connected to a smartphone
For many users, this won’t be a deal-breaker, but it’s worth noting at this price point.
Pros and Cons
What We Like
- Best battery life among Wear OS watches
- Premium materials: sapphire crystal, titanium, stainless steel
- Rotating crown improves navigation
- Strong health and fitness tracking
- Fast charging with USB-C
- Rugged certifications for durability
Where It Falls Short
- Large, heavy design not ideal for small wrists
- ECG not available in US/Canada
- Only two years of software updates
- No LTE connectivity
What the Experts Say
- TechRadar calls it “the Android smartwatch of 2025 so far,” praising battery and usability
- Droid-Life describes it as “an easy smartwatch to recommend”
- WIRED highlights “stunning battery life and reliable health features”
- Stuff awards it 5/5, applauding fitness tracking, build quality, and endurance
The OnePlus Watch 3 succeeds where many Android smartwatches still struggle. It delivers exceptional battery life, premium design, smooth performance, and reliable health tracking, making it one of the most balanced Wear OS devices ever released.
At Technologies For Mobile, we see the OnePlus Watch 3 as the smartwatch for users who want less charging, more reliability, and a truly premium Android wearable experience.
Would you choose battery life over LTE connectivity in a smartwatch?
Is premium build quality more important than long update support?
For more honest reviews, tech insights, and wearable coverage, visit
👉 www.technologiesformobile.com