Khmer Unicode Installer, also known as KUI, is a free utility and tool app developed by Cheng Sokdara for Android devices. As the name suggests, it is an all-in-one tool that allows users to install Khmer Unicode on their Android devices with just one click. This app eliminates the need to flash it in custom recovery or use root explorer, which can be complex and time-consuming.

Before using this app, it is highly recommended to do a nandroid backup first. This app also allows users to restore their original font and install their own fonts. Additionally, users can change or add Khmer to their system locale.

The latest version of the app, v3.x.x, has been optimized for Android Oreo and features tighter integration with the Khmer Font Store. The UI has also been streamlined for consistency. However, this app is intended for advanced Android users who know how to root their phones. If you don't know how to root, search on Google with the phrase "How to root." Please also note that this app is ad-supported.