OnionOS

Summary

OnionOS is ranked #12 of 25 in emulation frontends on Everything Xiaomi. It runs on Self-hosted.

Compared on emulation frontends

Supported platforms

Miyoo Mini and Miyoo Mini+onionui.github.io

Emulators included

Yesonionui.github.io

Library import

Yesonionui.github.io

Metadata scraping

Yesonionui.github.io

Controller navigation

Yesonionui.github.io

Portable mode

Yesonionui.github.io

Facts

Product

Onion is an OS overhaul for the Miyoo Mini and Mini+ handhelds.onionui.github.io · 2 Oct 2026

Game switching

GameSwitcher lets users browse recently played games and resume them with screenshots showing where they left off.onionui.github.io · 2 Oct 2026

Emulation

Onion includes RetroArch with dedicated drivers, custom overlays and filters, and optimized emulators.onionui.github.io · 2 Oct 2026

Game collection tools

Its Search app finds games by keyword, and its Game List Options menu can select cores, fetch cover images, launch Netplay, and filter lists.onionui.github.io · 2 Oct 2026

Customization

Users can change themes and configure system settings, network services, and button shortcuts through included tools.onionui.github.io · 2 Oct 2026

Activity tracking

The Activity Tracker records game playtimes, displays total playtime in the top bar, and lets users share playtime screenshots.onionui.github.io · 2 Oct 2026

Network features

On Miyoo Mini Plus, Onion offers Netplay, over-the-air updates, time synchronization, cover scraping, and network services including SMB, HTTP, SSH, and FTP.onionui.github.io · 2 Oct 2026

Installation

Onion is installed and kept on an SD card; the maker says Windows users can use Onion Desktop Tools to prepare the card and install or update Onion.onionui.github.io · 2 Oct 2026

Device requirements

Installation instructions specify minimum firmware versions of 20220419 for Miyoo Mini and 20230505 for Miyoo Mini+.onionui.github.io · 2 Oct 2026

Notable limitation

The built-in game image scraper is available on Miyoo Mini Plus only, according to the FAQ.onionui.github.io · 2 Oct 2026

Support

The project points users to GitHub Discussions, Discord, Reddit, and Facebook for community channels.onionui.github.io · 2 Oct 2026

GameSwitcher

GameSwitcher lets users browse recently played games and resume them from a screenshot of where they left off.onionui.github.io · 3 Oct 2026

Package Manager

The Package Manager app installs and uninstalls emulators and apps.onionui.github.io · 3 Oct 2026

Game library

Search finds games by keyword, and Activity Tracker records playtime and displays total playtime in the top bar.onionui.github.io · 3 Oct 2026

Ports

The Ports Collection page describes 61 game ports; some require users to provide licensed game files.onionui.github.io · 3 Oct 2026

Connected features

On Miyoo Mini Plus, Onion supports OTA updates, date and time synchronization, game-cover scraping, and network services including SMB, HTTP, SSH, FTP, Telnet, hotspot, and VNC.onionui.github.io · 3 Oct 2026

Multiplayer

Netplay supports online or local network sessions; Easy Netplay on two Miyoo Mini Plus devices needs no prior Wi-Fi setup, and Pokémon trading is available for GB/GBC.onionui.github.io · 3 Oct 2026

Installation support

Windows users can use Onion Desktop Tools to format an SD card and download, install, update, and configure Onion.onionui.github.io · 3 Oct 2026

Known limitation

The FAQ says a MainUI issue can prevent Wi-Fi networks with special characters from connecting, and reports no fix because MainUI is closed source.onionui.github.io · 3 Oct 2026

Where it ranks on Everything Xiaomi

• Best Emulation Frontends in 2026#12 of 25

Sources

• onionui.github.io· checked 2 Oct 2026
• onionui.github.io/docs/features· checked 2 Oct 2026
• onionui.github.io/docs/installation· checked 2 Oct 2026
• onionui.github.io/docs/faq· checked 2 Oct 2026
• onionui.github.io/docs/ports· checked 3 Oct 2026
• onionui.github.io/docs/multiplayer· checked 3 Oct 2026