Several users are getting the “App not Installed” on their Android phone when they try to install an application from third-party websites or other sources rather than Google play store.

What causes the App not installed in Android?

Most of the time this problem can be caused by the following number of reasons:

Apk File Location:

There can be two types of locations for phones, internal and external. Depending on the application it might work well in Internal rather than on an SD card and this can cause the installation failure.

Storage Space:

The common problem most users face is insufficient space on their phones. Every application has a different size and usage which can impact your phone storage.

Incompatible Application:

If the application you are trying to install on your phone is not compatible with your phone, then it can’t be installed and an error will occur.

Google Security:

Our phones are secured by Google’s security, which keeps the harmful applications away from our phone, and if it’s already in the phone it notifies the user about the threat.

Here is the solution :

1. Google Play Protect

Google Play Protect helps you keep your device safe and secure.
It runs a safety check on apps from the Google Play Store before you download them.
It checks your device for potentially harmful apps from other sources. These harmful apps are sometimes called malware.
It warns you about any detected potentially harmful apps found and removes known harmful apps from your device.
It warns you about detected apps that violate our Unwanted Software Policy by hiding or misrepresenting important information.
It sends you privacy alerts about apps that can get user permissions to access your personal information, violating our Developer Policy.

Solution:

Turn Google Play Protect off

Important:

Google Play Protect is on by default, but you can turn it off. For security, we recommend that you always keep Google Play Protect on.

1. On your Android phone or tablet, open the Google Play Store app.
2. Tap Menu icon, then select Play Protect, then select Setting.
3. Turn OFF “ Scan apps with Play Protect”. (Note: Make sure you turn it back ON as it was, after checking this method)
4. Now go and try installing your apk file.

2.Using Airplane Mode

This suspends all the transmission signals that the device is trying to get from services.

Solution:

1.On your main screen of the phone, scroll down the status bar of the phone.
2.Select the “Airplane Mode”, and press “Turn ON”Selecting airplane mode in your phone.
3.Now go and try to install your application.
4.While installing a notification may appear about “Blocked by Play Protect”.
5.Expand the “Details” by drop-down icon.
6.Then press “Install anyway”Select install anyway for google security.