Firmware

Custom OS deep-dives and comparisons — muOS, Knulli, Onion OS, and more.

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muOS vs KNULLI vs Onion OS: Which Custom Firmware Should You Use? cover image

muOS vs KNULLI vs Onion OS: Which Custom Firmware Should You Use?

A head-to-head comparison of the three most popular retro handheld custom firmwares — muOS, KNULLI, and Onion OS — covering features, performance, ease of use, and which devices each supports.