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PLAY ON ONION OS

Daybun on Miyoo Mini Plus

Take your Onion SD card, copy one folder, then open Daybun under Apps. This version checks daybun.com for updates each time you start it.

Download Daybun for Miyoo Mini Plus

ZIP file · 41.2 MB · Release ID: d222aceb3ee06b44

For Miyoo Mini Plus with Onion OS. This package is not intended for other handhelds.

Before you start

You need a Miyoo Mini Plus, a microSD card with Onion OS, and a card reader. Back up the card to your computer before changing it. Daybun is an Onion app: there is no firmware to flash and no ROM file to install.

Need to install Onion OS first?

Follow the official Onion guide first. For a new card, use FAT32 rather than exFAT. Keep the hidden .tmp_update folder on the card; it belongs to Onion.

Open the official Onion installation guide ↗

Install it step by step

  1. 01

    Shut down the Miyoo completely. Remove the microSD card and insert it into your computer.

  2. 02

    Download the ZIP above and extract it. Open the extracted App folder. Daybun is inside it.

  3. 03

    Open the microSD card in your file manager. Copy the Daybun folder into the App folder on the card. You should now have SD:/App/Daybun/launch.sh and SD:/App/Daybun/dgrun. If App does not exist, create it at the root of the card.

  4. 04

    Eject the card safely, insert it into the Miyoo, and turn it on. Open Apps → Daybun. If Daybun is missing, restart Onion and check the folder path.

  5. 05

    On the home screen, choose a game with the D-pad and press A. MENU returns to the Daybun home screen. Game saves stay on the SD card.

Automatic updates

When you open Daybun from Apps, it checks daybun.com before starting a game. If a new package exists, it downloads it over HTTPS, verifies its SHA-256 hash, carries over local saves, then switches to the new app. The previous version stays at SD:/Daybun/updates/previous. Without Wi-Fi or if the download fails, the installed version starts as usual. The first SD-card installation is required to put this updater on the device.

Verify your download

The ZIP file SHA-256 checksum is:

1644db209ad230816edfd9cb9999b2b597d018273185a58069f6b39a89b7383c

Windows: open PowerShell and use Get-FileHash on the downloaded ZIP file. macOS/Linux: use shasum -a 256 or sha256sum on the ZIP file.

If it does not start

  • Check that the card contains App/Daybun directly, rather than App/App/Daybun or App/Daybun/Daybun.
  • App/Daybun/log.txt contains the last run; log.prev.txt contains the run before it. Update messages go to Daybun/updates/update.log.
  • For a clean reinstall, replace only App/Daybun with the folder from the ZIP. Copy any save.txt and blk_*.bin files from the game folders first. The cloud folder at Daybun/cloud is outside the app.
  • If you installed the briefly available release 8e59d7f0eee8d944, install this current ZIP manually once. Its earlier updater could not read the update feed on Onion OS.

What we tested

The current ARMv7 package targets glibc 2.27 and was tested on a Miyoo Mini Plus with Onion OS 4.2.0 RC. The app updated from the previous release directly through daybun.com and preserved four save files. The DAYBUN home screen and all ten games completed 900 ticks on the device with exit code 0; the ten game runs used accelerated test mode. A full hands-on button playtest is still pending.

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