These applications are Progressive Web Apps (PWAs), meaning they run entirely in your browser with no traditional installation required.
Native-like Experience
You can use them directly in your browser, or you can "Install" them to your home screen or desktop by clicking the install icon in your browser's address bar for a native app-like experience.
Android APK Installation
These applications are distributed as standard Android APK files for direct installation on physical Android devices.
Security & Installation
To install the application, download the APK file to your device and tap it. You will need to allow installation from this source when prompted. After you click install, your Android device's built-in security features (like Google Play Protect) will automatically scan the APK for viruses to make sure it's completely safe before completing the installation.