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ROCKNIX vs Onion: catalog facts
ROCKNIX	Onion
Free Free, built from open-source components, with donations accepted.	Free Free to download, with source code published on GitHub.
Linux	Linux
Supports many handhelds from several brands Built-in save sync through Syncthing and rclone	More than 100 built-in emulators tuned for the device Auto-save and resume for quick pick-up play
Only runs on supported devices Installing replaces or bypasses the stock firmware	Only runs on the Miyoo Mini and Mini+ handhelds Games and BIOS files must be supplied by the user
Operating system	Operating system
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.