Custom Android firmware

user interface developed by Samsung

MIUI is a deprecated mobile operating system developed and used by Xiaomi for its smartphones and mobile devices from 2010 to early 2024, prior to the launch of its successor Xiaomi HyperOS. MIUI was based on the Android Open Source Project. Xiaomi produced versions for Xiaomi-branded smartphones and its own Poco, MIUI Pad, MIUI Watch, and MIUI TV (PatchWall).

CyanogenMod ( ; CM) is a discontinued open-source operating system for mobile devices, based on the Android mobile platform. Developed between 2009 and 2016, it was free and open-source software based on the official releases of Android by Google, with added original and third-party code, and based on a rolling release development model. Although only a subset of total CyanogenMod users elected to report their use of the firmware, on 23 March 2015, some reports indicated that over 50 million people ran CyanogenMod on their phones. It was also frequently used as a starting point by developers o

LineageOS is an open source Android (AOSP)-based operating system for smartphones, tablets, and set-top boxes. It is community-developed and serves as the successor to CyanogenMod, from which it was forked in December 2016. As of 2025, there are about 4.5 million devices running LineageOS.

EMUI (formerly known as Emotion UI) is an interface based on Android developed by Chinese technology company Huawei, used on the company's smartphones primarily globally.

TouchWiz is a discontinued user interface developed by Samsung Electronics with partners, featuring a full touch user interface. It is sometimes incorrectly referred to as an operating system. TouchWiz was used internally by Samsung for smartphones, feature phones, and tablet computers, and was not available for licensing by external parties. The Android version of TouchWiz also comes with the Samsung-made app store Galaxy Apps. It was replaced by Samsung Experience in 2017 with the release of Android 7.0 "Nougat".

GrapheneOS is a free and open-source, privacy- and security-focused, Android-based operating system for Google Pixel and future Motorola devices. GrapheneOS is built on the Android Open Source Project. It focuses on researching and improving the privacy and security of Android. GrapheneOS is developed by the GrapheneOS Foundation, a Canadian nonprofit corporation.

software overlay developed by Samsung Electronics

OxygenOS () is an Android-based operating system (OS) developed by Chinese smartphone manufacturer OnePlus exclusively for their smartphones. OxygenOS was developed for their overseas market. There used to also be another version of the OS designed specifically for the Chinese market called HydrogenOS ().

ColorOS is a user interface created by Oppo based on the Android Open Source Project. Initially, Realme phones used ColorOS until it was replaced by Realme UI in 2020. Realme UI uses some of ColorOS's apps. Starting from the OnePlus 9 series, OnePlus will preinstall ColorOS on all smartphones that are sold in mainland China instead of HydrogenOS (Chinese version of OxygenOS).

mobile personalization layer based on Android published by Xiaomi

free software version of Android

free and open source OS distribution based on LineageOS

mobile operating system based on Android

OmniROM is an open-source operating system for smartphones and tablet computers, based on the Android mobile platform. It involves a number of prominent developers from other projects.

Wikimedia list article

AOKP, short for Android Open Kang Project, is a discontinued open-source replacement distribution for smartphones and tablet computers based on the Android mobile operating system. The name is a play on the word kang (slang for stolen code) and AOSP (Android Open Source Project). The name was a joke, but it stuck. It was started as free and open-source software by Roman Birg based on the official releases of Android Open Source Project by Google, with added original and third-party code, features, and control.

Mobile penetration testing platform for Android devices

Android-based mobile operating system

BharOS (formerly IndOS) is a closed-source, Android-based operating system developed by IIT Madras. It is funded by the Indian government, which intends to use it on government and public systems.

operating system

CopperheadOS is a mobile operating system for smartphones, based on the Android mobile platform. It adds privacy and security features to the official releases of the Android Open Source Project by Google. CopperheadOS is developed by Copperhead, a Canadian information security company. It is licensed under Creative Commons BY-NC-SA 4.0, although its source code is not available for public download.

Android-based operating system by LG Electronics

crDroid is a customized fork of Android, based on LineageOS. It has offered unofficial releases of Android 10 up to Android 16.

PixelExperience is a discontinued, open-source, Android-based operating system. The project was initiated by a community of developers in 2017. Pixel Experience was designed to be as close to "stock Android" as possible, with a focus on reliability, security, stability, performance, battery life, and useful customizations.