How to Fix 'App Not Installed' Error in GTA San Andreas Mod APK

The "App Not Installed" error is one of the most common issues encountered when attempting to sideload GTA San Andreas Mod APK on Android smartphones and tablets. This error typically occurs due to signature conflicts with pre-existing game files, insufficient storage space, or Android Play Protect blocking installation.

Step-by-Step Solutions

1. Uninstall Any Pre-existing GTA SA Version

Android OS prohibits installing two applications with identical package names (com.rockstargames.gtasa) if they carry different digital signatures.

• Go to Settings > Apps > See All Apps.
• Search for GTA: SA or Grand Theft Auto.
• Tap Uninstall and confirm removal.
• Also check Secure Folder or Dual App / Parallel Space settings on Samsung and Xiaomi devices so no hidden copies remain.

2. Free Up Internal Storage

GTA San Andreas requires approximately 2.0 GB of space for installation, but Android package installer requires at least 3.5 GB of free temporary buffer space during the APK unpacking process.

• Clear temporary files and cache via Settings > Storage > Free Up Space.
• Keep at least 4.0 GB of free internal storage before opening the APK file.

3. Temporarily Disable Play Protect

1. Open the Google Play Store app.
2. Tap your profile icon in the top-right corner.
3. Select Play Protect > Settings (Gear Icon).
4. Toggle off "Scan apps with Play Protect".
5. Return to your File Manager and install the GTA SA Mod APK file.