One UI 9 Watch beta lands on Galaxy Watch7 and Watch Ultra

Samsung has started rolling out the One UI 9 Watch beta to the Galaxy Watch7 and Galaxy Watch Ultra, with a 1.9GB download, a September 2026 security patch, and Wear OS 7 as the base. The update is live in South Korea first, and Samsung Members beta signup is now open for Watch7 testers there, with a US rollout expected soon.

This beta puts Samsung’s 2024 smartwatches back into the company’s testing cycle and adds new health-focused tools, including Antioxidant Index and Vascular Load support. The build also brings a refreshed interface and new widgets, giving early testers a look at what Samsung wants to change before the software reaches a wider audience.

Galaxy Watch Ultra beta update adds Antioxidant Index and Vascular Load

The Galaxy Watch Ultra beta update adds a few of the most noticeable changes in this release. Samsung is pairing a refreshed interface with new widgets, which should make the beta feel more like a broader software refresh than a routine maintenance build. The update is also bringing health tracking features into sharper focus.

Antioxidant Index support and Vascular Load feature support are included on the Galaxy Watch7 and the original Galaxy Watch Ultra. That matters because these are the kinds of health features Samsung seems to be pushing more prominently in this test build. While the outline does not spell out every detail of how the tools work, it is clear that Samsung is using this beta to move its wearables further toward the health-first direction that is now common across the smartwatch market.

The update also keeps Samsung’s high-end watches aligned with current software moves from Apple Watch and Pixel Watch, both of which have leaned heavily into health tracking improvements. In this case, the comparison is mostly about direction rather than feature-by-feature parity. Samsung is testing a package that combines a new platform base, visual changes, and added wellness tools in one release.

Samsung Members beta signup opens the Watch7 firmware to testers

Galaxy Watch7 beta firmware users in Korea can enroll through the Samsung Members beta signup flow now. That gives testers a direct path into the One UI 9 Watch beta without waiting for a wider public rollout. Samsung is still keeping the release limited, though, and the current rollout is confined to South Korea for now.

The US is expected to follow soon, according to the outline, but Samsung has not opened the beta there yet. That staged release suggests the company is still working through stability checks before the software reaches a larger audience. Wear OS 7 smartwatch updates can be complex, especially when they cover both system-level changes and new health features, so a slower rollout is not surprising.

For Galaxy Watch owners, the important detail is that Samsung has restarted its smartwatch beta cycle for the Galaxy Watch7 and Galaxy Watch Ultra. The 1.9GB size, the new security patch, and the feature additions all point to a meaningful update. Even so, it remains a test build, so the controlled market rollout and beta signup process are part of the normal path toward a broader release.

At this stage, the update is best viewed as an early look at Samsung’s next smartwatch software direction. Users in South Korea can already try it on the Watch7, and the Galaxy Watch Ultra is included in the same beta wave. If Samsung follows the expected timeline, the wider US push should give more testers a chance to see how One UI 9 Watch behaves on the company’s latest wearables.