: Adding new features, themes, or custom assets to an existing application.
Only download apps from Google Play or other verified sources that perform integrity checks.
: The modified files are re-assembled back into a standard APK structure.
To the average user, an Android application package (APK) is a sealed black box. You download it, you install it, and you use it. But to a reverse engineer, a modder, or a security researcher, an APK is merely a ZIP file full of resources waiting to be unpacked, altered, and reconstructed.