- Download CPU-Z from Playstore.
- Launch the app and navigate to the system tab.
- Here you will be able to see your device architecture type. For eg. aarch64.

- Now you need to download the APK files, which are compatible with the aarch64 architecture type.
- Once done, download & install the APK for that arch type, and see if the error permits.
Method 3: Delete Existing App Data
If you have previously installed this app from the Play Store and are now attempting to reinstall it through sideloading, it is important to ensure that you have removed the app’s data file from the previous installation. Failure to do so may result in conflicts between the older and newer data, preventing successful app installation. To resolve this issue, follow the steps below to delete the previous data and then proceed to check the results.
- Open any File Manager app on your device and navigate to the following folder:
Internal Storage > Android > Data
- Here make sure you delete the folder associated with the app you are trying to install. For eg. com.android.facelook
- Now go to the below location and delete the app data from there as well
Internal Storage > Android > OBB
- Once done, try to re-install the app again and see if this helps.
Method 4: Delete Existing App
Many users in the Android community have shared their thoughts on the problem as well. As a result, we are able to pinpoint the issue towards the same APK file with a different architecture version installed on the device. When you try to install any APK files over an already installed application on your device, such issues may arise, and you will get the App Not Installed As Package Appears To Be Invalid error message in return. To fix this, make sure to completely delete the application and then try to install the APK file.
Method 5: Reset App Preferences
In certain situations, existing configuring files for a specific app can cause such issues while installing an additional file. So it’s best to reset all app preferences to their default state. By doing so, you can reset disabled and default app settings, as well as remove any imposed restrictions (note that this action will not delete any app data). This will provide you with the original stock settings to work with.
- Open the settings app on your device and navigate to Settings> Menu > Reset action.

- Here search for the reset app preferences option.

- Once done, try installing the app again to see if this helps.
Method 6: Downgrade App
In certain scenarios, the most recent version of an app may contain bugs or issues that prevent it from being installed on your device. To resolve this, it is recommended to download an older version of the app from reputable sources such as APKMirror. By installing an older version, you can bypass any potential problems associated with the latest release.
Method 7: Change Package Name
If you are a developer and are facing the issue of App Not Installed As Package Appears To Be Invalid while installing your self-built app, it’s important to note the app compatibility for the device. Oftentimes there are small package issues while compiling, which may lead to this error. So try changing the package name and recompiling the APK file to see if this helps.
Conclusion
This brings us to the end of this guide for fixing the App Not Installed As Package Appears To Be Invalid error message. Please note that installing any third party app or game can be dangerous for your device and may make you vulnerable to future cyber attacks. It’s important to make sure the APK file you are installing is properly checked and validated to come from a trusted developer only. The above methods shall help you fix the error code, but if you have any further questions, feel free to comment below.
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