One UI is a software overlay developed by Samsung Electronics for its Android devices running Android 9 “Pie” and higher and Windows devices running Windows 11 and higher. Succeeding Samsung Experience and TouchWiz, it is designed to make using larger smartphones easier and become more visually appealing. To provide more clarity, some elements of the UI are tweaked to match the colors that are based on the color of the user's phone. It was announced at Samsung's developer conference in 2018, and was unveiled in Galaxy Unpacked in February 2019 alongside the Galaxy S10 series, Galaxy Buds and the Galaxy Fold. It is also the software layer for their smartwatch Tizen and Wear OS platform, which Samsung co-developed with Google. Then Samsung released One UI 2 in 2019, the second generation update to One UI (powered by Android 10), provides Galaxy users with a skinned Digital Wellbeing experience, a more refined UI in some default apps such as Device Care, a minor UI change to the clock position in quick settings, a native screen recorder, the new Android 10 gesture system, Dynamic Lock Screen (different wallpaper with every unlock), a Trash folder in Files, native Android Auto, and harder Location permission access. One UI 2.0 has already rolled out to Galaxy S10, Note 10, Galaxy S9, and Note 9 on 3 December 2019. After that, One UI 3.0, based on Android 11, was released for Galaxy S20 devices beginning on 2 December 2020. The update includes a few noteworthy revisions, such as a translucent notification panel, brief notifications, new volume controls positioned on the right or left of the device alongside the physical volume keys, slightly enhanced widgets, and smoother animations and transitions throughout the whole UI. One UI 4, based on Android 12, is the fourth generation of One UI. It was released to the Galaxy S21 Series on 15 November 2021. One UI 4 focuses on customization, privacy, and access to Samsung's expanding ecosystem. One UI 4.1, a minor update for One UI 4.0, was first released with the Samsung Galaxy S22 series. It brought minor changes, however it did introduce features like Smart Calendar, added option to choose how much virtual RAM is desired (from 2, 4, 6 or 8 GB), redesigned palette picker, Smart Widgets, separate Left/Right audio balance, extra brightness toggle, Pro Mode on more cameras, Night Mode portraits, and other minor changes. One UI 5.0, announced on 12 October 2022, based on Android 13, is the fifth-generation version of One UI. It is released publicly on 24 October 2022 for Samsung's Samsung Galaxy S22 series along with several other models, like the Samsung Galaxy Z Flip 4 and Samsung Galaxy Z Fold 4, with the update coming to older models later.
Some features and changes include the ability to turn off the RAM Plus feature, where previously users could only limit it to 2GB rather than turning it off entirely, and a redesigned way of customizing the lock screen, similar to iOS 16. Material You was also expanded to most of Google and Samsung Apps along with some third-party apps that support material you, allowing more ways to customize One UI. One UI 5 also brings refreshed icons for a more-refined look across the UI
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