miui

MIUI is Xiaomi's custom Android-based operating system. The first MIUI OS was based on Android 2.2 Froyo and was initially developed for the Chinese market in 2010. It featured added apps like Notes, Backup, Music, and Gallery, and was later ported to other languages by independent developers, contributing significantly to Xiaomi's early success.

No, MIUI is being replaced by Xiaomi HyperOS. Xiaomi's founder, Lei Jun, officially announced HyperOS in October 2023 as the successor to MIUI, stating it would power the upcoming Xiaomi 14 series. The company has since been rolling out HyperOS updates to replace MIUI on its smartphones, tablets, and POCO and Redmi devices throughout 2024 and 2025.

Later MIUI versions introduced several user-focused features. MIUI 14, based on Android 13, brought improved system security and a faster 'Search in Setting' feature. A highlight of MIUI was its Memory Extension feature, which allocates more RAM to the system by using internal storage as virtual memory. Another thoughtful feature since MIUI 12 was background video playback, which allowed video playback with the screen off, though this was later removed in the HyperOS update (MIUI 15).