How to Fix App Not Installed Error on Android?

Android is one of the most used operating systems in the world. It is loved by millions of users worldwide. The credit goes to a long list of apps it has to use. However, issues like the ‘App not installed‘ error can prevent you from installing and using your preferred apps. If you are looking for working solutions to this problem, this post is specially written for you.

Here, I will tell you how to fix the App not installed issue on Android. I will provide you the top 5 solutions to resolve the issue along with all the necessary information about it.

What is the App Not Installed Error?

The Android user experience is entirely based on Android apps. So, it is essential to install the right apps to have the best experience. The ‘App Not Installed‘ error is a common Android error that messes with that by not allowing you to install a certain APK file. This issue was earlier only a part of KitKat, Lollipop, and Marshmellow versions but now it has started appearing in the newer versions as well.

It occurs when you try to install certain APK file, the installation won’t complete and the ‘App not installed‘ error message appears on the screen. There is no explanation or a reason why it has happened. It can occur on any Android device, whether it is a smartphone, tablet, or even an emulator. This annoying issue will prevent you from continuing your work.

So, it is essential to know about the solutions to fix it. Before that, you have to understand why this error is appearing on the screen.

What Causes this problem? 

To fix this error efficiently, you need to first understand why it is appearing. There are multiple possible causes for this annoying Android issue. Let’s take a look at some of the most common causes for the ‘App not installed’ error.

  • The APK file hasn’t downloaded completely or it is corrupted. Try re-downloading the Apk.
  • There is insufficient storage space on your device. Your device storage space is almost full.

  • The location (device/SD Card) where you are trying to install the app is incorrect.
  • The storage (device/SD Card) is corrupted.
  • There is an APK Signature/Certificate clash among the app versions. Or, the app is unsigned.

  • The location where you are trying to install the app is mounted somewhere else.
  • Google security is preventing installation.
  • An operating system glitch is not allowing you to install the app.

These are some of the common causes that may lead you to the app not installed issue.

How to Fix the App Not Installed Error?

After thorough research, we have found the top 5 solutions to get rid of this issue. If you know why the error is appearing on your Android device, you can use the specific solution to get rid of the cause. Or, you can simply try the solutions one after another until the problem is gone.

1. Restart & Install the App in Airplane Mode

The quickest fix to this error is to restart your device and install the app in the Airplane mode. Let me explain briefly. Firstly, restart your Android device. Now turn the Airplane mode on. Next, tap on the APK file and install it. If you see the ‘Blocked by Play Protect’ prompt, tap on ‘Install anyway.’

Once the app is installed successfully, turn the Airplane Mode off. That’s it. It is a simple solution but works like charm for the majority of users.

2. Reset All App Preferences

Another simple fix to get rid of this error is to reset all app preferences from the Settings. Follow these steps in order to know how to do that:

  • Open the Settings app on your device.
  • Tap on Apps.
  • Next, tap on Manage Apps.
  • Next, tap on Reset App Preferences.
  • Once it confirms, tap on Reset Apps.

That’s it. Now try installing the APK file that was showing error.

3. Allow Apps from Unknown Resources

Android blocks apps from resources other than the Play Store by default. So, if you haven’t allowed installation from unknown sources, then you may frequently see this error. To fix it, you have to allow the installation of apps from unknown sources. Follow these steps to do that:

  • Open Settings on your device.
  • Now tap on Security.
  • Here, find the Allow Installation of Apps from Unknown Sources option.
  • Turn the toggle switch present next to it to the ‘On’ position.

That’s it. Now try installing the APK file and see if the error goes away.

4. Disable Google Play Protect

Google may block certain Apk files from installation due to security reasons. So, if you want to install them, you have to turn off the ‘Google Play Protect’ feature. Follow these simple steps in order to do that.

  • Open the Play Store on your device.
  • Tap on ‘3-horizontal lines’ present on the top left of the screen or simply swipe from left border to right.
  • Now find and tap on Play Protect.

  • Next, tap on the Settings (gear) icon present on the top right corner of the screen.

  • From here, disable the ‘Scan apps with Play Protect’ switch Off.

That’s it. Now try installing that Apk file. Remember that you have to turn back this feature on after installing the app as it is essential for your security.

5. Edit the App Code

If none of the above methods worked for you, there is an ultimate one that won’t fail. You can try changing or editing the App code by using a third-party editor to get rid of this issue. Follow these steps to know how to do that.

  • Download and Install this APK Editor on your Android device.
  • Once installed, run it and tap on Select an Apk File or Select Apk from App.

  • Choose the problematic Apk file and then tap on Common Edit.

  • Now change the Install Location of the app to ‘Internal Only. You can also change the ‘Version code’ of the app according to your needs.

  • After the modifications, tap on Save and exit the app.

That’s it. Now try installing this modified version of the app. If you have a pre-installed app for it, first uninstall that, and then install this version.

One More Solution for MIUI Users

MIUI Optimization can also lead to this error. So, you can simply turn it off and then install the APK file. You can turn MIUI Optimization off from the ‘Developer Options’ in ‘Additional Settings.’

Remember you’ll first need to enable Developer options to use this method. Quick googling would tell you about it or you can ask me in the comments. Turning off MIUI optimization will clear all app permissions. So, you’ll have to grant them again.

Final Take

This is how you can fix the ‘App not installed’ error on Android devices. You can install the app you were trying to and have fun. However, if you are still suffering from the problem, I’d recommend that you should try a different version of that app or an alternative to it instead of wasting your time.

Also, check if the app you are trying to install is an XAPK file (App bundle). If it is, you’ll need a ‘Split Installer’ to install it. That’s all for this post. I hope you find it helpful. If you need any help regarding anything mentioned here, feel free to use the comment box.