What Is Samsung One UI 9? Galaxy AI Features Explained

Samsung's One UI 9 is the latest version of the company's custom Android interface, built on top of Android 17. It arrived first on the Galaxy Z Fold8 and Galaxy Z Flip8, which shipped with the stable version pre-installed. Now, the update is making its way to a wider range of Galaxy devices through a public beta program that has expanded rapidly since May 2026.

If you're holding a Galaxy S26, S25, or even an S24, you might already be eligible to try One UI 9 before the stable release. The update brings a sharper focus on Galaxy AI features, redesigned navigation, and better foldable screen support. Here's what you need to know about Samsung's latest software and where it's headed.

What Samsung One UI 9 Actually Changes

One UI 9 doesn't reinvent the wheel. Samsung has kept the overall structure familiar while refining how things look and feel. The navigation bars are redesigned, menus are cleaner, and the system adapts better to different screen sizes, especially on foldable devices.

The most visible improvements show up on the Galaxy Z Fold8. Both the cover screen and main display now use optimized aspect ratios, so you can switch between short-form and long-form content without awkward letterboxing. Rotation between portrait and sideways modes is smoother when you're reading articles or watching videos on the wide main screen.

Not revolutionary. But noticeably better.

Samsung also improved DeX Mode. Window snapping now works top and bottom in addition to left and right, which makes multitasking on a larger monitor feel closer to a desktop experience. Not flashy. But useful. These changes add up if you use your phone for real work.

Galaxy AI Features in One UI 9

The headline attraction of One UI 9 is the expanded set of Galaxy AI features. Samsung has positioned its Galaxy AI assistant as a tool that learns your habits and works across apps without sending you to a separate search bar.

So what can it actually do?

• Now Nudge is the standout addition. It watches what's on your screen and offers contextual suggestions in real time. If you're texting a friend about dinner plans, Now Nudge can surface the Calendar app or suggest saving a location to Maps without you manually switching apps. It also works on the keyboard, predicting what you'll want to do next based on the conversation context.
• My FanCam solves a specific problem for people who record at events. You film the whole scene with a wide-angle lens, then later pick one person from the footage. The feature automatically centers and crops the video around that subject, choosing the aspect ratio that fits your target social platform. You do this from the Gallery app, so there's no need for a separate video editor.
• Photo Assist now accepts voice commands. Instead of typing out edit instructions, you can describe what you want changed in a photo, and the AI applies the edit while you watch. You can compare the original and the edited version side by side on the screen before committing.
• Now Brief got a meaningful upgrade. It delivers short, personalized summaries of your day, and you can now customize which topics appear based on your interests. The Action Button on supported devices lets you jump directly into tasks, like opening your music app or navigating to a saved calendar event.

How the One UI 9 Beta Works

Samsung runs its beta program through the Samsung Members app. You enroll your device, and when a beta build is ready, it arrives as a standard software update in Settings > Software update > Download and install.

The beta started in May 2026 with the Galaxy S26, S26+, and S26 Ultra. Samsung expanded it in early September to the Galaxy S25, S25+, S25 Ultra, and S25 FE, along with the Z Fold7 and Z Flip7. By September 4, ten more devices joined: the S23, S23+, S23 Ultra, Z Fold7, Z Flip7, Z Fold6, Z Flip6, A57, A56, and S24 FE.

The beta is available in India, Korea, the United States, and the United Kingdom. Samsung hasn't published a fixed end date, but given the pace of expansion across flagship, foldable, and now mid-range devices, the stable rollout is approaching fast. Internal testing reportedly covers around 80 Galaxy devices, including tablets and lower-tier phones.

Samsung Android 17: What the Foundation Means

One UI 9 sits on Android 17, which brings its own set of under-the-hood changes. Better notification management, improved lock screen widgets, and refined app windowing are part of the base package. Samsung layers its design language and Galaxy AI tools on top.

The practical effect is that apps adapt more intelligently to different display sizes. If you're on a Z Fold8, an app can shift from a compact cover-screen view to a full main-screen layout without restarting. If you're on a standard phone like the S25, the changes are subtler but still noticeable in how notifications stack and how quick settings are organized.

Supported Devices and the 7-Year Update Promise

Samsung has committed to seven years of OS updates for its flagship Galaxy devices, starting from the S24 series. One UI 9 landing on the S23 series suggests that even phones from 2023 are still in the update pipeline, but this may be their last major version bump.

Here's a snapshot of where the beta stands:

AI feature availability varies by device. The newest flagships get the full suite, while older or mid-range phones may receive a limited subset.

What to Watch Out For

Beta software has rough edges. Battery life can drop. Third-party apps might crash. Some features shown in Samsung's marketing materials may not work yet on your specific device. If your phone is your only device and you can't afford downtime, wait for the stable release.

The AI features also depend on region and language. Now Nudge's contextual suggestions work best in English and Korean, with other languages receiving support later. Photo Assist's voice commands are similarly limited at launch.

Samsung hasn't announced a fixed stable release date for the broader rollout. Given that the Z Fold8 and Z Flip8 already ship with One UI 9, and the S26 series has been in beta for months, a stable push to S25 and S24 devices before the end of 2026 looks likely.

Conclusion

One UI 9 is a refinement release, not a revolution. The Galaxy AI features, especially Now Nudge and My FanCam, are the genuine additions worth paying attention to. If you're on a supported Galaxy device and you're comfortable with beta software, the Samsung Members app is your entry point. Everyone else shouldn't have to wait long. Samsung's software update pipeline is moving faster than usual, and the beta expansion to mid-range phones signals that the final build is close.

Note: Back up your data before installing any beta software. For your safety, Samsung's beta builds are generally stable enough for daily use, but unexpected bugs can still occur.