MIUI is a stock and aftermarket firmware for smartphones and tablet computers based on the Google Android operating system. MIUI includes various features such as theming support. Developed by Xiaomi
License: Free
Tizen is an operating system based on the Linux kernel and the GNU C Library implementing the Linux API. It works on a wide range of devices, including smartphones, tablets, in-vehicle infotainment devices, smart TVs, PCs, smart cameras, wearable computing (smartwatches), Blu-ray players, printers and smart home appliances. Developed by Linux Foundation
License: Open Source
MIUI is a highly customizable Android skin with a vast app ecosystem, while Tizen OS is a lightweight system optimized for smart devices and IoT. MIUI offers extensive features and integrations within the Xiaomi ecosystem, whereas Tizen focuses on efficiency and security.