One of the most popular alternatives to HarmonyOS is Android, which is free and open source. Other popular alternatives are GrapheneOS, LineageOS, /e/ and Nura (postmarketOS). You're spoiled for choice with Operating Systems like HarmonyOS: we list more than 50 alternatives for Android, Linux, Windows, Mac and self-hosting.
The Kali Linux NetHunter project is the first Open Source Android penetration testing platform for Nexus devices, created as a joint effort between the Kali community member “BinkyBear” and Offensive Security. NetHunter supports Wireless 802.
Project Elixir basically offers a minimal UI enhancement & close to Stock Android ROM with great performance, security and stability. Your experience while using Project Elixir will be butter smooth without compromising the quality of the Android experience.
Ubuntu Touch is made and maintained by UBports. It is a free and open source mobile OS for you! Meanwhile we care about your privacy and freedom.
CrDroid is a customized fork of Android based on LineageOS bringing a lot of custom features ported from others great roms out there.
Allows native execution of iOS apps and games on Apple Silicon Macs running macOS 12 or newer, featuring advanced mouse, keyboard, and controller support, custom keymapping options resembling Bluestacks, open source code, and support for a wide range of mobile applications.
Sweden
EU
The new operating system from OnePlus, based on Android. OxygenOS is light and essential with subtle, useful features.
China
Local Desktop helps you run a desktop Linux environment on your Android device.
Droid4x is Android simulator, which is good in aspects of performance, user experience, compatibility and gaming controllability. Making millions of mobile games and apps as desktop experience.
United Kingdom
touchHLE is a high-level emulator for iPhone OS apps. It runs on modern desktop operating systems and Android, and is written in Rust.
United States
Xiaomi HyperOS is a proprietary operating system developed by Xiaomi. It's designed to provide an enhanced user experience through its unique features and functionalities. The system integrates seamlessly with Xiaomi's wide range of devices, creating a unified and...
China
KaiOS brings smartphone-like functionalities to affordable phones: the KaiStore for apps. Video calls over 4G. Mobile payments through NFC. Even dual-SIM support.
United States
