Alternatives to KaiOS

Android is a free and open source mobile operating system built on-top of the Linux kernel. The OS is used by over 150 million people world-wide, which makes it the most popular mobile operating system on earth. Android is optimized for how you use your phone, helping you manage conversations, organize your day, and connect with the people that matters most to you.

Ubuntu Touch is a free and open-source mobile operating system maintained by the UBports community. The OS was first create by Canonical LTD, the company behind the Linux distribution, Ubunutu. With Ubuntu Touch, you can use your mobile devices in a free and open manner. Ubuntu Touch also allows you to turn your phone into a desktop computer using the "desktop mode"

A mobile operating system designed by Apple, that runs on iPhone, iPad and Apple Watch devices. iOS uses a multi-touch interface in which simple gestures operate the device, such as swiping your finger across the screen to move to the next page or pinching your fingers to zoom. These gesuters and the ease of use and simplicity of the operating system is one of many things that brought success to the platform and Apple as a whole.

Phoenix OS is an operating system specifcally designed to bring Android gaming to the PC. The OS is based on Android 7.1 and is developed and released free and open-source. With Phoenix OS you can play your Android games on a big screen, with mouse and keyboard support thanks to Octopus keymapping engine and Game Assistant, offering a powerful fundamental keymapping.

Replicant is a fully free and open source Android distribution designed for freedom, privacy and security. Replicant replaces all proprietary Android components with free and open counterparts allowing you to be in control of your operating system, its software and your personal information and data.

LineageOS is an open-source Android distribution available for several devices. With LineageOS personalization, privacy and security is on the forefront of development. Allowing you to enjoy an mobile operating system that you are in control of and can personalize to your needs. LineageOS also provides powerful privacy and security tools such as Privacy Guard so that you can be in control of what your apps can do whenever you want.

Remix OS is an operating system for personal computers with x86 and ARM architectures that, prior to discontinuation of development, shipped with a number of 1st- and 3rd-party devices. With Remix OS you can run mobile Android apps on your Intel-based desktop PC.

Plasma Mobile is a free and open-source, Linux-based user interface for phones. The project aims to a complete software system for mobile devices that is designed from the ground up to give users control over their information and communication. Plasma Mobile takes a pragmatic approach and is inclusive to 3rd party software, allowing the user to choose which applications and services to use.

Deepin is a free and open-source Linux distribution based on Debian. The distribution is developed by the Chinese company Wuhan Deepin Technology. Deepin features the modern looking Deepin Desktop Environment and its own app store, the Deepin Store. The Deepin Desktop Environment which is built with Qt can also be used on other Linux distribution including Arch Linux, Fedora, Manjaro and Ubuntu.

HarmonyOS is a free operating system designed for smartphones, smart TVs and IoT. The OS is developed by the Chinese manufacturing giant, Huawei.