MyMinUI updated, is it OnionOS Alternative?

May 13, 2025

For some time now, OnionOS has been considered the default operating system for the Miyoo Mini and Mini Plus. The manufacturers of these handheld devices are brilliant—you have to give them credit. They know that if they build a quality device that’s easy to modify software-wise and doesn’t cost an arm and a leg, someone out there will get behind a project and deliver what the manufacturer can’t: broad support and compatibility.

Looking for an Alternative?

But what if you’re looking for an alternative to OnionOS (which, by the way, is built on Miyoo’s original firmware), or you’ve got a different device that doesn’t support it? Then check out MyMinUI, which was just updated to its latest version. MyMiniUI is a fork of a custom launcher and libretro frontend and In addition to the Miyoo Mini and Mini Plus, it also works on the Miyoo A30, Anbernic RG35XX, and R36S consoles.

Unlike OnionOS, MyMinUI has a minimalist design but still offers wide support for many systems (see the list below), and it runs exceptionally fast. The latest update fixed a lot of issues (full changelog here), with special attention paid to a sound issue—specifically crackling in certain games.

Here’s the full list of supported systems:

Amiga (PUAE)
Arcade (MAME)
Atari2600 (A2600)
Atari5200 (A5200)
Atari7800 (A7800)
Doom (DOOM)
FinalBurnNeo (FBN)
Game Boy (GB)
Game Boy Advance (GBA)
Game Boy Advance (MGBA)
Game Boy Color (GBC)
MSDOS (DOS)
Neo Geo Pocket Color (NGPC)
NeoGeo (NG)
NeoGeo CD (NGCD)
Nintendo Entertainment System (FC)
Pico-8 (P8)
Pico-8 Native (P8N)
Pokémon mini (PKM)
Quake (QUAKE)
Sega Game Gear (GG)
Sega Genesis (MD)
Sega Master System (SMS)
Sony PlayStation (PS)
Super Game Boy (SGB)
Super Nintendo Entertainment System (SFC)
Super Nintendo Entertainment System (SUPA)
TurboGrafx-16 (PCE)
Virtual Boy (VB)
WonderSwan (WS)

As you may have noticed, Nintendo DS is missing—but it’s easy to add. All you need to do is install the steward-fu Drastic pack in just two steps:

Place drastic folder in Emu folder
Place NDS roms in Roms/NDS folder

MyMinUI Screenshots — *Some UI Screenshots to give you the general idea.*

How to Install MyMinUI on Your Device

Step 1: Download the latest release from the official GitHub page.

Step 2: Extract the contents somewhere on your computer or phone.

Step 3: Copy the folder meant for your specific device directly to the root directory of your microSD card.

Step 4: Also copy the entire ZIP file (yes, the one you downloaded) to the root of your microSD card.

Step 5: Insert the card into your device, boot it up, and wait for the installation to complete.

One small caveat: once the installation actually finishes, the device won’t automatically reboot. In my case, my Miyoo Mini Plus went into timeout mode (it powered off on its own). But when I turned it back on, I was greeted by the minimalist MyMinUI menu—so the installation was a success.

All that’s left now is to add your ROMs into the appropriate folders.

If you want to go a step further, it’s possible to generate custom box art for all your ROMs. More info and a tutorial on how to do that (hint: it involves the command prompt) can be found at this link.

P.S. Use separate MicroSD cards for each OS, they are cheap enough so you can have one for the Original MM firmware, OnionOS and MyMinUI.