If you want to locate the APK files in your Android phones, you can find the APK for user-installed apps under /data/app/directory while the preinstalled ones are located in /system/app folder and you can access them by using ES File Explorer.

Why can’t I open APK files on my phone?

Depending on your device, you might need to give a specific app, such as Chrome, permission to install unofficial APK files. Or, if you see it, enable Install Unknown Apps or Unknown sources. If the APK file doesn’t open, try browsing for it with a file manager like Astro File Manager or ES File Explorer File Manager.

How do I install an APK file on my Android?

Copy the downloaded APK file from your computer to your Android device in your chosen folder. Using the file manager application, search for the APK file’s location on your Android device. Once you find the APK file, tap on it to install.