Unknown Sources
N/A
未知来源
Unknown Sources · N/A · 未知来源 · un-NOWN SOR-sez · install unknown apps · untrusted sources · Digital Security · android · sideloading · everydayDigital Securityinstall unknown apps untrusted sources/un-NOWN SOR-sez/
Also known as: install unknown apps, untrusted sources
Last updated August 9, 2026
Definition
Unknown sources (or “install unknown apps”) is the Android setting that allows installing packages from places other than the Play Store.
Real-World Example
Turning on unknown sources for a file manager so you can install one APK — then turning it off again — reduces lasting risk.
References
Related terms
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