.APK File

What is it?

APK (Android Package) is the installation file format for Android apps, bundling the app's code, resources, and manifest into one file.

How do I open it?

Installs directly when opened on an Android device (after allowing installs from the source); on a PC, APK files aren't runnable but can be inspected with tools like an APK analyzer.

Is it safe?

APKs from the official Google Play Store are safe. APKs downloaded from other websites ("sideloading") bypass Play Store's security checks and are a common way malware spreads on Android — only install ones from developers or sources you trust.

Can I delete it?

Safe to delete an APK file after installing the app; it's just the installer, not the app itself.