By clicking a retailer link you consent to third-party cookies that track your onward journey. This enables W? to receive an affiliate commission if you make a purchase, which supports our mission to be the UK's consumer champion.

OnePlusWatch 3

Oxygen OS watch 7.0 + Wear OS 5.0

£271.15View retailers

Test score

Lowest available prices

Sign up to unlock the full expert review

The OnePlus Watch 3, the latest iteration at £319 promises accurate tracking, long battery life, and rich smart capabilities for Android users. But does this versatile smartwatch truly live up to its ambitious claims in daily use? Dive into our detailed review.

pros

Content has been blurred out, please log in to view.

cons

What's included?

What is it?
What can it do?
What’s the setup like?
What’s it like to wear and use?
How accurate is it?
How long is the battery life?
How secure is it?
Is there anything else I should know?
Should I buy it?

Full Access first month £5, then £11.99 per month, cancel at any time.

KEY TEST RESULTS
Battery life
Smart notifications
Comfort

Jul 2025First reviewed by Which?
Feb 2025Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test smartwatches

10 Apr 2025

Ease of use

Overall
Set up
Ease of navigating menus
App
Comfort
Smart features

How we test ease of use

Includes ease of setup, charging, navigating the onscreen menus and personalising the device

Screen quality

Overall
Readability of screen in bright light
Readability of screen in low light
Scratch resistance of screen

How we test screen quality

Because you'll be using your smartwatch in a range of conditions - including outdoors in bright sunlight, at home during the day and at night-time - we rate the quality, brightness, contrast and visibility of the display. We also rate how scratch resistant it is.

Smart notifications

Overall
Phone calls
Messaging

How we test smart notifications

Rates the smartwatch’s ability to handle calls, messages (including SMS and Whatsapp messages) and notifications. The phone calls rating is based on the calls features of the watch and the sound quality of the speaker/microphone where applicable. Notifications ratings include message and social media notifications. The App rating is based on the availability of apps for receiving notifications and how useful and actionable these notifications are.

Battery life

How we test battery life

Score impacted by how long the watch lasts per charge of the battery, how quickly it charges and how much use you can get from a 15-minute charge

Health tracking

Overall
Accuracy of step tracking
Accuracy of distance tracking
Accuracy of heart rate monitor

How we test health tracking

How well the watch measures steps, distance and heart rate (for models with a built-in heart-rate monitor). Individual ratings include the accuracy of tracking for each metric (steps, distance, calories), plus the consistency of tracking between sessions. Only smartwatches with built-in GPS or a heart-rate monitor are tested for these

General
Type of smartwatch	Smartwatch
Weight (g)	79.5g
Width (mm)	51.4mm
Thickness (mm)	14mm
Operating system	Oxygen OS watch 7.0 + Wear OS 5.0
Removable strap	Yes

Features
Built-in heart rate monitor	Yes
Sleep tracking	Yes
NFC	Yes
Notifications for texts	Yes
Notifications for phone calls	Yes

Display
Screen size (mm)	38mm

Connections
iOS compatible	No
Android compatible	Yes
Android version requirements	Android 9.0 and higher
Built-in GPS	Yes

Compare retailers

Prices updated daily

Prices are ordered from lowest to highest, irrespective of retailer rating or stock, and exclude any potential delivery costs. We are not able to show every possible retailer and cheaper prices may be available.

Best smartwatches 2025 and buying guide
Our extensive tests on smartwatches, including Apple watches, reveal the best to buy – plus, what to look out for and how much you need to spend
Best budget smartwatches: cheap wearables under £100 and £200
Smartwatches can be expensive, but most people don't need a pricey, specialist, device. Discover the best budget models
How we test smartwatches
We test battery life, fitness tracking accuracy, ease of use and much more so you can pick the perfect smartwatch for you

All smartwatch advice

Suggested searches

OnePlusWatch 3

Lowest available prices

Sign up to unlock the full expert review

pros

cons

What's included?

How we test smartwatches

Ease of use

Screen quality

Smart notifications

Battery life

Health tracking

Compare retailers

How this product's score compares with other smartwatches we've tested

Related articles

OnePlusWatch 3

Lowest available prices

pros

cons

What's included?

Test results

Specifications

Where to buy (2 retailers)

Best Buys & Don't Buys

Related articles