Enable Unknown Sources: Go to Settings > Security > Enable "Unknown Sources." Visit the APK download website: Open the website in a browser. Search for the app: Look for the desired app using the search function or browse categories. Download the APK file: Tap the download button or link for the app. Install the APK file: Locate the downloaded file and tap on it. Allow app installations: If prompted, enable installations from the downloaded source. Install the app: Follow the on-screen instructions to complete the installation.