OnePlus Watch 3 review

OnePlus Watch 3 solves the main complaint about Wear OS watches: battery. OnePlus lists up to 5 days in Smart Mode and up to 16 days in Power Saver Mode, against up to 40 hours for the Pixel Watch 4 45mm. The US store sells the 46mm model for $349.99. Hardware includes a 1.5-inch LTPO display with a sapphire crystal face, a stainless steel case with a titanium alloy bezel, IP68 and 50m water ratings, MIL-STD-810H testing and dual-frequency GPS. A 60-second Health Check-In reads key indicators in one touch, including arterial stiffness compared with peer data. Wear OS by Google provides apps and watch faces. The limits are clear in the footnotes: the OHealth app needs Android 9.0 or above, iOS is not supported, and OnePlus states the watch is not a medical device. We compared documented features and published prices only.

Who it is for

Android owners who want Wear OS with multi-day battery

Price

$349.99 one-time for the 46mm model.

OnePlus Watch 3 46mm Obsidian Titanium $349.99
Quoted from the vendor pricing page on November 12, 2026.

Key features

• Up to 5 days of battery in Smart Mode and up to 16 days in Power Saver Mode
• 1.5-inch LTPO display with a sapphire crystal face
• Dual-frequency GPS
• 60-second Health Check-In
• Titanium alloy bezel, IP68 rating and MIL-STD-810H testing

Strengths and weaknesses

• Strength: Wear OS with up to 5 days of battery, more than any other Wear OS watch here
• Strength: Sapphire crystal face rated 8+ Mohs
• Strength: $349.99, the same price as the Pixel Watch 4
• Weakness: OHealth app supports Android 9.0 and above only; iOS is not supported
• Weakness: OnePlus says it is not a medical device
• Weakness: Only the 46mm size appeared on the US buy page we checked

Key facts

• Price: $349.99 (46mm)
• Phone: Android 9.0 and above
• Battery: Up to 5 days Smart Mode, 16 days Power Saver
• Display: 1.5-inch LTPO, sapphire crystal
• Durability: IP68, 50m, MIL-STD-810H

Where it ranks

OnePlus Watch 3 is No. 8 in our Best Smartwatches verdict.