The slim king migrates from China—and it might just be a preview of a future OnePlus smartwatch

Oppo is ramping up its global smartwatch presence, quietly beginning the rollout of the Watch S global edition in Europe.

Following an initial rollout in China last year, the Watch S is now available on Oppo’s Austrian storefront and at several third-party retailers across the continent, priced at €259.

The Watch S is a relatively basic tracker in terms of functionality, but a potential game-changer in design, with a remarkably slender 8.9mm case. This represents a 25% thickness reduction over its predecessor, and that’s also paired with a featherweight 35g chassis.

The display is equally aggressive, featuring a 1.46-inch AMOLED panel that hits a peak brightness of 3,000 nits. This puts Oppo in a direct luminosity battle with the Apple Watch Ultra 3, ensuring that even under the most punishing midday glare, data remains crisp and readable.

An early preview?

For the global market, however, the Watch S could prove more than just an Oppo release; it could also offer insight into a future OnePlus smartwatch. Given that Oppo’s domestic releases almost always migrate to the OnePlus brand in the UK and US, this ultra-slim design may even be a preview of a OnePlus Watch 4.

On the performance front, Oppo claims the Watch S can last up to four days with the always-on display active, or ten days in power-saving mode. If these efficiency gains carry over to a Wear OS-powered OnePlus variant, it would arguably become the best-performing ‘true’ smartwatch in terms of stamina.

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The health suite is similarly comprehensive, introducing a skin temperature sensor for the first time in this line, along with dual-frequency GPS for precise outdoor tracking. However, given regulatory hurdles, it’s not yet clear whether other advanced health features—like ECG readings—will be available in the global version.

While the €259 price point is competitive, the combination of a sub-9mm frame and a top-tier display could make the Watch S a legitimate mid-range disruptor in 2026. For now, though, we’ll await the rest of this European rollout.