If you use a Samsung Galaxy mobile, you most likely live with its Android layer, One UI, on a daily basis. This is Samsung's own interface for mobile phones, tablets, and other devices., an experience designed to make everything more comfortable on large screens and to ensure that hardware and software work together seamlessly.
Beyond being a simple “theme”, One UI is a vision of use. Focus important actions within easy reach of your thumb, simplify menus, and better organize information.It adds navigation gestures, dark mode, enhanced privacy, and increasingly deeper customization. It has also been incorporating AI features as part of the Galaxy AI push in recent versions.
What is Samsung One UI and what are its principles?
One UI is Samsung's customization layer based on Android and its services. It was launched in 2018 as a replacement for TouchWiz and Samsung Experience And since then, it has become the cornerstone of Galaxy software. Its goal: to make everything clearer, more achievable, and more consistent across the entire range.
The central idea is ergonomics. The interactive elements are lowered to the bottom so they can be used with one hand.The upper area houses large headers and content that doesn't require constant tapping. This pattern is repeated in system apps to make navigating them feel natural.
From the beginning, Samsung opted for order and simplification. The screens are structured in layers: actions below, information aboveIn addition, the system's dark mode, gestures, quick settings panel, and horizontal navigation of recent apps provided continuity and convenience.
Personalization is another pillar. You can change themes, colors, icons, and stylesAnd in recent generations, the system adapts the wallpaper's color scheme. Privacy has also been enhanced with camera and microphone usage indicators and clearer permission controls.
One UI Home, the official launcher, also evolved. It allows full-screen gestures and locks the home screen layout to prevent accidental changes.and quickly access app and widget settings with a long press. It even details optional permissions from the launcher itself, such as storage or contacts, to restore the layout or the contacts widget.
In terms of system productivity and efficiency, small changes make a big difference: Quick Share for one-touch file sharingSticky notes in Samsung Notes that don't alter the document, filters in Downloads by source app, a Samsung Internet with a reorganized and customizable menu, and a scientific calculator that works both vertically and horizontally.
On foldable devices and large screens, One UI stretches with specific features. My files use multipane to navigate paths without getting lostAnd on some Galaxy Z Flip models, the Now Bar appears, which lets you activate key tools or view multimedia controls without unlocking the device.
Evolution of One UI: versions and key new features
One UI 1.x
The first batch arrived based on Android 9. It included dark mode, custom gestures, visual tweaks, and improvements to Always On Display.There was a native screenshot editor, a more flexible Bixby, and the ability to remap its physical button. One UI 1.1 refined the camera, fingerprint, and facial recognition; One UI 1.5 added Windows integration and minor sound tweaks.
One UI 2.x
With Android 10, One UI 2.0 refined the interface of apps like Device Care, it added native screen recorderstricter location permissions, dynamic screen lock and adopted standard Android gestures. Version 2.1 brought support for 120Hz on compatible models, Quick Share, Music Share, new camera modes, and Live Captions; version 2.5 focused on camera improvements, DeX, gestures, and services.
One UI 3.x
Based on Android 11, One UI 3.0 introduced Notifications with a translucent panel, new volume controls, and smoother animationsVersion 3.1 added features such as Object Eraser in Gallery, Eye Comfort Shield, Multi Mic recording, and improvements to Single Take and camera exposure. Version 3.1.1, which debuted with the Galaxy Z Fold 3, enhances multitasking for foldable devices.
This stage solidified the idea that One UI not only cosmetically enhances Android, but also adds functional improvements without breaking coherence with the base system. The widgets and transitions were polished, and the ecosystem felt more fluid. in general.
One UI 4.x
With Android 12, One UI 4 prioritized privacy, personalization, and better integration between system appsIt adopted dynamic wallpaper theming and improved permission visibility. Version 4.1 expanded options such as adjustable virtual RAM, Smart Widgets, Pro Mode for more cameras, brightness adjustments, and other small everyday improvements.
One UI 5.x
The generation based on Android 13 brought a highly customizable lock screenUpdated icons and more Material You support, even in some third-party apps, were included. Version 5.1 added a battery widget, improved suggestions in Settings and Spotify, camera and gallery enhancements (adjusting tone in selfies, finer remastering), and multitasking improvements. Version 5.1.1, exclusive to foldable phones and tablets, brought improvements to the taskbar, Flex mode, two-handed drag and drop, and the ability to hide apps in floating windows.
One UI 6.x
Based on Android 14, One UI 6.0 debuted Redesigned quick panel with improved access to brightness, notifications sorted by timeVersion 6.1 included a new system font (One UI Sans), new emojis, and smoother multitasking. Camera, Gallery, Photo Editor, and Weather also saw improvements. Version 6.1 represented a significant leap forward. Galaxy A.I.AI functions that, using local and cloud-based models, Translations, summaries, and editing are improved.Battery protection was added, along with SuperHDR, which is also noticeable on social media, and the option to display the lock screen wallpaper in Always On Display.
In addition, Samsung and Google unified file sharing by merging Quick Share and Nearby Share. Seamless A/B updates debuted on the Galaxy A55Installing it on a secondary partition to avoid interrupting device use. Version 6.1.1, again focused on foldable phones, added AI tools such as Portrait Studio, Suggested Responses, and Sketch to Image.
One UI 7.0
One UI 7, based on Android 15, marked a remarkable visual change. Icons, widgets, camera app and lock screen have been redesignedThe quick panel is now split by default between notifications and controls. In US models, Samsung Phone, Messages, and Contacts were replaced by their Google equivalents with RCS support (though they remain available in the Galaxy Store). DeX for PC and downloadable Edge panels were also dropped, with Link to Windows and third-party alternatives being promoted instead; new ringtones and sounds were introduced for the first time since the Galaxy S20 series.
For the first time, One UI aspires to be default interface also on TVs, monitors, projectors and household appliances of the Samsung ecosystem. As of March 2025, the stable rollout was delayed: only some models (such as the Galaxy S25 and certain 2025 A series models) came with it pre-installed. The official update plan for recent generations of Galaxy S and Galaxy Z devices began in April 2025 with varying dates by country.
What are people saying about One UI 8 and 8.5?
Headlines and leaks about what would come next are appearing on the radar. There's talk of a smart data saver for video apps and networksAI-powered features for seamless Wi-Fi and mobile data switching, automatic captions for calls, a potential Alerts Center, and Dynamic Effect for animating objects in photos are among the suggested improvements. It's also suggested that DeX could be revamped to better align with the Android desktop, and that features like Boost Dialogue would gain quick access from the dashboard.
All of this is based on advances reported in betas and rumors. Until there is an official announcement, it's best to take them with a grain of salt.But they point in the right direction: more practical AI, digital wellbeing and performance tweaks, and design refinements.
Compatible devices and update policy
Samsung has been extending One UI to a large part of its catalog since 2018. The company offers up to four years of One UI and operating system updates and five years of security patches. for flagship models from 2021 onwards; in addition, some Galaxy Books receive Windows security for 18 months after the last major feature release.
Among the devices covered by that policy are Galaxy S21 and later, Galaxy Z Fold 3 and Z Flip 3 and later, certain Galaxy A, Galaxy Tab A8 and Tab S8, the Galaxy Watch 4 series and successors, and Galaxy Book laptops sold since 2021.
Regarding compatibility and version limits, these are the main areas covered by recent historical data (textual summary of the provided tables): in the Galaxy S series, from S8 to S25 we find:
- Galaxy S8, S8+, S8 ActiveThey reached One UI 1.0 on Android 9.
- Galaxy S9 and S9 +They reached One UI 2.5 (Android 10).
- Galaxy S10e, S10, S10+, S10 5G and S10 Lite: up to One UI 4.1 (Android 12).
- Galaxy S20, S20+, S20 Ultra and S20 FE: up to One UI 5.1 (Android 13).
- Galaxy S21, S21+, S21 Ultra- Plan up to One UI 7 (Android 15).
- Galaxy S22, S22+, S22 Ultra: plan up to One UI 7.
- Galaxy S23, S23+, S23 Ultra and S23 FE: plan up to One UI 7.
- Galaxy S24, S24+, S24 Ultra and S24 FE: plan up to One UI 7.
- Galaxy S25, S25 + and S25 Ultra: They are born with One UI 7 on Android 15.
In Galaxy Z series (folding):
- Original Galaxy Fold: it went up to One UI 4.0.
- Galaxy Z Flip and Z Flip 5G: up to One UI 4.1.
- Galaxy z fold 2: up to One UI 4.1.1.
- Galaxy Z Flip 3 and Z Fold 3: up to One UI 4.1.1.
In Galaxy Note family:
- Note Fan Edition: up to One UI 1.0.
- Notes 8: up to One UI 1.0.
- Notes 9: up to One UI 2.5.
- Note 10 and 10+ (LTE/5G), and Note 10 Lite: up to One UI 4.1.
- Note 20 and Note 20 Ultra: up to One UI 4.1.
In the wide Galaxy A series (representative sample):
- A8/A8+ 2018: up to One UI 1.0; A6/A6+ 2018 and A7 2018: up to One UI 2.0.
- A8 Star/A9 Star and A9 2018: up to One UI 2.0.
- A10, A10e (A20 Japan), A20, A20e: up to One UI 2.0; A10s It arrived at One UI Core 3.1.
- A20sOne UI Core 1.1 to 2.0 depending on the region; A30 One UI 2.0; A30s One UI 3.1.
- A40, A80: up to One UI 2.0; A50 One UI 3.1; A50s One UI 2.5.
- A60/M40: up to One UI 2.0; A70 and A70s One UI 3.1.
- A90 5G: up to One UI 2.5.
- A01 Core/M01 Core: One UI Core 2.1 (Android Go on the first one); A01, A11, A21: One UI Core 2.1.
- A21s: One UI Core 2.1 to 2.5; A31 It upgraded to One UI 4.1.
- A41: One UI 2.1; A51 to One UI 3.0 and A51 5G to One UI 3.0; A71 One UI 3.1.
- A02, A02s/M02s: up to One UI Core 3.1; A12 and A12 Nacho: up to One UI 5.1/5.1 Core.
- A32 5G: up to One UI 4.1; A52 and A72: up to One UI 6.1 and 4.1 respectively.
- A03 and A03 Core: up to One UI 5 Core/One UI Core 3.1; A13, A23, A33, A53, A73: They were born in One UI 5.1 (Android 13).
- A04, A04s, A04e: up to One UI 6.1; A14: One UI 5.1; A24, A34: One UI 5.1; A54: One UI 6.1.
En Galaxy XCover: XCover 4s up to One UI 2.0; XCover Pro with One UI 2.0. In the Galaxy M seriesModels like the M10, M20, and M30 were upgraded to One UI Core 2.0, while the M30s went from Core 1.5 to 2.0; M21, M31 and M31s They upgraded to One UI Core 3.0/2.5, and M51 It remained on One UI Core 2.5; M01, M01s and M11 They started on Core 2.0/2.1.
In old Galaxy J seriesMany 2017 models reached One UI 1.1 (J3, J5, J7 and variants), and others (J7 Duo, J4, J6, J8) reached One UI 2.0; the J4+ went up to One UI 1.0 and the J6+ to One UI 2.0. In tablets, the Tab S3 and S4 They reached One UI 1.0 and 2.1, S5e and S6 One UI 2.1 was around, S7 / S7 + They arrived in One UI 3.1 and S8 They were born with One UI 4.1.
En A Galaxy TabThe Tab A 8.0 2017 was upgraded to One UI 1.0; the 8.0 2018 and 10.5 were upgraded to One UI 2.1/2.0; the 2019 models (8.0, 8.0 with S Pen and 10.1) reached up to One UI 3.1 in some cases; Tab A7 2020 It started with One UI 2.5. This mosaic confirms something clear: Samsung has maintained long support cycles across a very extensive range, with logical differences due to hardware, generation and region.
Update your Galaxy and get essential One UI features
Upgrading is easy and worthwhile for new features and security. (If you need reset a Samsung tablet Before updating, consult the guide.) Go to Settings, enter Software Update, and tap Download and InstallIf a version is available, it will download and you can install it immediately or schedule it. Make sure you have enough battery or keep your phone charging during the process.
The connected ecosystem deserves special attention. Merging Quick Share with Nearby Share simplifies sending files between Android and Windows.In addition, One UI 6.1 added Galaxy AI with models on the device and in the cloud (in China, Baidu; globally, Gemini Pro), along with improvements such as SuperHDR visible even in third-party apps and new battery protections.
Tricks and tools that make a difference
- Sidebar and multi-windowCustomize the Edge Panel with shortcuts to apps and utilities, and save pairs of apps to open them in half-screen with a single tap.
- Notification history: recovers deleted alerts and, incidentally, reads deleted messages in apps like WhatsApp from Settings, Notifications, Advanced settings.
- Modes and routines: automates tasks (silence apps during working hours, turn off WiFi when leaving home) with contextual rules.
- Bixby answering for youActivate text call in the Phone app to transcribe and filter suspicious calls.
- Take care of the battery: Limit background activity and configure automatic optimization from Device Care and Battery.
- AI-powered browserSamsung Internet can translate and summarize long articles without extra apps.
- Instant translationWith Samsung's keyboard and Galaxy AI, translate chats in apps like WhatsApp or Instagram on the fly.
- RAM control: Exclude resource-intensive apps from Device Maintenance to improve performance.
- S Pen at full speedCreate GIFs from any video, take notes on the fly, and edit with precision.
- Clearer voice on callsActivate dialogue enhancement from the quick settings while speaking so you can be heard better in noisy environments.
- AI-powered editing in Gallery: erase unwanted objects or crop subjects with AI Image Clipping to create stickers or move them to other images.
- Secure lockHide the last digit of your PIN or pattern from Secure Lock settings to gain privacy.
- Stylish alarm clocksChoose backgrounds for your alarms from the Clock app, giving a personal touch to every wake-up.
Meaning of One UI, origin and time in the ecosystem
UI stands for User Interface, while One alludes to the idea of a single, consistent interface across devices and designed for one-handed use. It was unveiled at the 2018 Samsung Developer Conference and debuted on the Galaxy S10 in early 2019.
Samsung came from TouchWiz, a powerful but cluttered layer, and from Samsung Experience, a bridge to a cleaner aesthetic. One UI involved a profound redesign to simplify, reduce visual noise, and adapt to increasingly larger screens.Since then, it has been a hallmark of Galaxy for over six years and coexists with One UI Watch (based on Wear OS) in the company's smartwatches.
With each version, One UI has adopted key improvements (dark mode, gestures, dynamic theming, practical AI, visual refinement), without neglecting compatibility and long support cyclesIt is even beginning to expand its language to televisions and other household appliances.
With an eye to the future, One UI has moved towards more connected and proactive experiences: From Now Bar and multi-pane on large screens, to unified Quick Share and A/B updates which they install in the background. Everything points to continuing to refine ergonomics, adding AI where it truly makes a difference, and maintaining stable performance across a huge portfolio of devices.
