If you have ever tried to install an app outside of the Google Play Store on your Android phoneYou've probably come across APK files and may have received an error message when trying to install them. This is an increasingly common process, as there are many useful apps that, for various reasons, aren't available in the official app store. However, Installing APK files requires knowing certain steps and precautions To avoid security and compatibility issues, we'll explain in detail in this article. How to install APKs on Android, troubleshoot common errors, and learn about essential risks and security measures..
What is an APK file and what is it used for?
Un APK file (Android Application Package) is an executable package that contains all the elements necessary to install an application on Android devices. It works similarly to a .exe on Windows o .dmg on MacThat is, the APK contains all the resources, code, images, and data the app needs to function properly on your phone or tablet.
This format allows you to install applications manually, a particularly useful option if the app isn't available in your region, if you want to access beta or preview versions of an app, or if you need a specific version for compatibility reasons.
At present, The Google Play Store uses the AAB (Android App Bundle) format. for your downloads, but when you install an app outside the store, it's common to find the file in APK format.
What are the risks of installing external APKs?
Downloading and installing APKs outside of Google Play involves certain security risks What you should consider:
- Malware and viruses: APKs downloaded from unofficial sites may be altered and contain malware, which can harm your device or violate your privacy.
- Exposure of personal data: Some APKs may request excessive permissions and access your personal information without you knowing.
- Incompatibility: If you download an APK that doesn't match your Android architecture or version, the app may not work or may generate unexpected errors.
- Updates: Apps installed via APK don't automatically update from the Play Store, so you'll need to manually check for new versions.
Recommendation: Always download APKs from official, secure and recognized sites (such as APK Mirror, the developer's site, etc.), and review the permissions the app requests before installing it.
Why do I get the “App not installed” error when installing an APK?
The “App not installed” error is common when trying to install an APK on Android, especially if it’s your first time installing apps outside of Google Play. The main cause is usually the lack of permits, although it may also be due to incompatibility, corrupted files, or version conflicts.
In most cases, Android blocks the installation of apps from unknown sources by default as a security measure. Another common cause could be the presence of an older or different version of the same app installed, which causes a conflict during a manual update.
Step by Step: How to Enable Installation of Unknown Apps Based on Your Android Version
The way to enable APK installation may vary depending on the android version to use your mobile phone. Here's how to do it in all variants:
On Android 8.0 (Oreo) and later
- Open the Settings of the System.
- Go to the section of Applications and notificationsOn some devices it may just be “Apps.”
- Select option Special access & AFTER Install unknown applications.
- Choose the app you'll be installing the APK from (for example, your browser or file manager).
- Activate the option Allow from this source.
This permission must be enabled on each individual application from which you want to install APKs (for example, both in Chrome and File Manager, if you use both). For more details, check out our step-by-step guide at how to install APK on Android.
On Android 7.0 and earlier versions
- Go to Settings and find the section Security.
- Locate the option Unknown sources or “Unknown sources” and activate it.
- Confirm the risk warning notice.
With this permission enabled, the system allows you to install any APK from any app, so it's important to disable it later if you only need it occasionally.
Complete steps to install an APK file on Android
- Download the APK from a secure source: Use recognized websites or the developer's website. Remember to verify that the file matches your model or architecture, if necessary.
- Open the APK file: You can do this from the notification panel, the download manager, or using a file manager like ES File Explorer.
- Grant the necessary permissions: If this is your first time, you will be directed to the settings to enable installation from that source.
- Confirm the installation: Review the permissions the app requests and tap on Install.
- Open the app: Once installed, you can access it from the app menu or the home screen.
Remember: If you already have an older version of the app installed, you may need to uninstall it first or make sure the APK has the same signature (developer's digital signature).
Solutions to common errors when installing APKs on Android
If you're still seeing the "App not installed" message or a similar error after following the steps above, here are the recommended solutions:
1. Remove residual data from previous installations
- Open your file manager (e.g. ES File Explorer).
- Access the root of the operating system and enter the folder System. Delete any residual folders or files related to the app.
- Do the same in the folder Data.
This is especially useful if you're trying to reinstall an app you've previously installed and corrupted files are preventing the new installation. To avoid complications, also review the section how to extract APK from any Android app.
2. Set up and review Play Protect
Play Protect is Android's native security system that monitors app installation and can block external APKs if it detects risks. Go to Settings / Security / Play Protect And check if you have the option enabled to block apps from unknown sources. You can temporarily disable it to allow installation, but remember to re-enable it later to maintain security.
3. Verify the integrity and compatibility of the APK file
- Check that the APK is not corrupted and that the download was successful.
- Always download the file from the official developer site and check that it is compatible with the Android version of your device.
4. Use advanced tools like Dr. Fone
If the problem persists and you suspect that it may be due to errors in the operating system, you can resort to repair tools such as Dr. FoneThis app is installed on your computer and can fix common Android system errors:
- Install Dr. Fone and connect your Android device via USB.
- Follow the repair menu and select the “Android Repair” option.
- Follow the on-screen instructions and confirm the steps to begin the process.
Where to download APKs safely?
To prevent infection or damage to your device, You should only download APKs from recognized sites and with a good reputation. Some safe options include:
- Official website of the application developer.
- Popular repositories like .
Never download APKs from suspicious links or unknown forums, and if possible, scan the files with an antivirus before installing them.
How to disable permission for unknown sources after installation
One of the best security practices is disable permission to install from unknown sources once you're finished. To do this:
- Go back to “Settings” and look for the “Applications” or “Application Manager” section.
- Go to “Special app access” and “Install unknown apps.”
- Disable the option in the browser, file manager, etc., from which you installed the APK.
