OnionOS

Self-hosted

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Freedom report

One barScore 5.4

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely0 of 6 device platforms
DocumentedPlans, terms and facts published

OnionOS is ranked #15 of 25 in emulation frontends on Freedom251. It runs on Self-hosted.

Compared on emulation frontends

Supported platforms: Miyoo Mini and Miyoo Mini+
Emulators included: Yes
Library import: Yes
Metadata scraping: Yes
Controller navigation: Yes
Portable mode: Yes

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The record

Product: Onion is an OS overhaul for the Miyoo Mini and Mini+ handhelds.
Game switching: GameSwitcher lets users browse recently played games and resume them with screenshots showing where they left off.
Emulation: Onion includes RetroArch with dedicated drivers, custom overlays and filters, and optimized emulators.
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.
Customization: Users can change themes and configure system settings, network services, and button shortcuts through included tools.
Activity tracking: The Activity Tracker records game playtimes, displays total playtime in the top bar, and lets users share playtime screenshots.
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.
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.
Device requirements: Installation instructions specify minimum firmware versions of 20220419 for Miyoo Mini and 20230505 for Miyoo Mini+.
Notable limitation: The built-in game image scraper is available on Miyoo Mini Plus only, according to the FAQ.
Support: The project points users to GitHub Discussions, Discord, Reddit, and Facebook for community channels.
GameSwitcher: GameSwitcher lets users browse recently played games and resume them from a screenshot of where they left off.
Package Manager: The Package Manager app installs and uninstalls emulators and apps.
Game library: Search finds games by keyword, and Activity Tracker records playtime and displays total playtime in the top bar.

Where it ranks on Freedom251

Best Emulation Frontends in 2026#15 of 25

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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