sideloaded app; unverified app; unofficial app
Colloquial term for a smartphone app obtained outside official stores, often implying potential security risks or lack of vetting. The prefix 野良 (stray/wild) suggests something unofficial or uncontrolled.
Installing sideloaded apps carries a risk of virus infection.
This unverified app isn't on the official store, but it has useful features.
Compound of 野良 (stray, wild, not belonging to anyone) and アプリ (app). The term likely emerged in the smartphone era to describe apps distributed outside official channels, drawing on the image of a stray animal.