This android app can convert any website to an android app.
Just set the value of the string variable "url" to your desired website url in MainActivity.java.
Google Sign-In, Facebook Sign-In etc. to create an account on a website is working.
Android Studio 4.0
Android 4.1
Android Webview is not appropriate for handling popups. So, I took help from this repository & modify some codes to handle popups in webview. To handle redirects in popups, the instructions of here are followed.