Guides

Practical help for installing, verifying and downgrading Android apps.

• How to install an APK file on Android
  Step-by-step: allow installs from your browser or file manager, open the APK, and what to do when Android refuses to install it.
• How to check an APK's SHA-256 checksum
  A checksum proves that the file you downloaded is exactly the one the developer published. How to check it on Android, Windows, macOS and Linux.
• How to install an older version of an Android app
  Why you might want to go back to an older version, how to do it without losing data, and the signature rule that decides whether it works.
• Which APK should I download? arm64-v8a, armeabi-v7a and x86 explained
  Some apps are published as several files for different processors. How to find out which one your phone needs.
• APK vs AAB: Understanding Android App Distribution
  Discover the differences between APK and AAB (App Bundle). Learn why Split APKs are used and how they help save storage and improve performance on Android.
• Android Version to API Level Table & How to Find Yours
  Comprehensive guide mapping Android versions to API levels, including a full table from Android 1.0 to 16 and steps to check your device's version.
• Solving Android App Signature Mismatch & Install Errors
  Learn why the App Not Installed error occurs due to signature mismatches and discover safe ways to resolve it while protecting your personal data.
• How to Backup Android App Data Before Downgrading
  Learn how to safely backup your Android app data, settings, and media before downgrading to an older version to prevent permanent data loss.
• Open-Source Android Apps vs. Google Play Store Apps
  Understand the differences between open-source Android apps and Google Play apps regarding transparency, security, licensing, and distribution.