What is OnionOS? A guide for Miyoo Mini Plus
OnionOS is the go-to custom firmware for the Miyoo Mini Plus. Here's what it does, how to install it, and why most people use it.
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Scanline Team · 
If you own a Miyoo Mini Plus, you’ve probably seen OnionOS mentioned constantly. It’s the most popular custom firmware for the device. Here’s what you need to know.
What is OnionOS?
OnionOS is a custom operating system for the Miyoo Mini and Miyoo Mini Plus. It replaces the stock firmware with something actually pleasant to use.
Key features
- Clean, customizable interface with themes
- RetroAchievements — earn achievements in classic games
- Wi-Fi game sync — sync saves and scrape artwork
- Package manager — install apps and emulators without hassle
- Sleep mode — instant resume from where you left off
Latest version
OnionOS is actively maintained. Check our Firmware Tracker for the latest version and changelog.
Is it safe?
Yes. OnionOS installs on the microSD card, not the device itself. Swap in a stock card and everything reverts.
Where to download
Always download from the official GitHub repository. Never use third-party sources.
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Scanline Team
Retro gaming and emulation hardware.