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The good thing about an Android smartphone is the vast availability of apps that you can have on your smartphone. You can literally have thousands of apps for doing one thing, if the app isn’t available on the Play Store, you can download it from some other place and then install it. However, you might see an error reading “App not installed”. It is actually not that hard to fix APK not installed problem.

In this article, we are going to show you how to fix APK not installed problem, all the methods you can try to fix it, and what are the possible reasons for this to happen in the first place.

Why Do You See “App not installed” Error?

While this is not an issue that you will see generally, there are some reasons that the APK file which you are trying to install is giving you this problem. Here are some possible reasons:

Corrupted Files

This tends to be one of the major culprits in this whole APK not installed problem as corrupted files always cause problems in installation. So for this, you would want to download APK files from a trusted source and just see what people are saying in the comments section about the file. If it has positive comments, you can download it.

Also to differentiate between a corrupted file and a good file, always know that the corrupted file will have a smaller size compared to the original one as it has some files missing.

Storage Problem

Low storage might also cause this error as the APK needs all the files in the package to be installed on your storage and a lack of storage will restrict some of the files from being installed which will cause the error.

System Permissions Missing

If you have not given the necessary system permissions that are required to install an APK file from some unknown sources, your file will not be installed.

Unsigned App

You see that all of the apps must be signed by a Keystore. A Keystore is a binary file that contains a set of private keys for apps and these keys allow the apps to work on devices. If that app is unsigned, it won’t work.


Incompatible Versions

If the app that you want to install is not compatible with your device’s OS version, then it won’t be installed on your device and you will get this error message.

Fix APK Not Installed Problem

By Resetting App Preferences

Step 1: Go to Settings, tap on ‘Apps & notifications.

Step 2: Tap on ‘See all apps.

Step 3: On the top-right corner, tap on the three dots, then tap on ‘Reset app preferences.

Step 4: When the dialog box open, tap on ‘RESET APPS’.

fix APK not installed problem

That’s it and you are all set. Now try installing the APK file again.

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By Disabling Google Play Protect

Step 1: Open Google Play Store, tap of the top-left of the search bar to open the menu.

Step 2: Tap on ‘Play Protect’.

Step 3: On the top-right corner, you will find the settings icon, tap on it.

Step 4: From the menu, disable ‘Scan apps with Play Protect’.

fix APK not installed problem

That’s it and you are all set now try installing the APK file, and after successful installation, turn Play Protect on again.

By Signing an APK File Yourself

As discussed above, if an APK file isn’t signed by a Keystore, it won’t work. The good news is that you can sign the APK file yourself. Here’s how to do it.

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Step 1: Download “apk-signer” from the Play Store.

Step 2: Open the app, click on ‘SIGNING’ tab.

fix APK not installed problem

Step 3: Click on the “pencil” icon on the bottom-right, and select the APK file that is causing the problem.

fix APK not installed problem

Step 4: Now you will see the ‘SAVE’ button, click on it and the signed version of the app will be saved on your device.

Step 5: Now open the signed APK file and try installing it.

That’s it and you are all set.

Some Other Tips to Fix This Issue

  • Make sure that you allow installation of apps from unknown sources. Whenever you will download an APK file, then you click to open it you will see the option to enable installation from unknown sources, all you have to do is allow that.
  • Do not install APK files from an old SD card or some old physical storage.
  • You can also try formatting your SD card if you have any, and then try installing the APK file.

So these were some of the methods that you can use to fix APK not installed problem. Try these methods and do let us know in the comments about the one that worked best for you.

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