NotifyAvailability takes input from the user to set up background periodic check of a webpage for a text. It creates a background task to notify the user if a text is present on the web page or not. This task is executed repeatedly once every ~15 mins depending on the OS. It will also show the time check was last made.

One use case is that we enter the URL of a movie booking website to get notified when it opens booking for a Cinema on the day we want.
Anti-Features:
NonFreeComp (the applicatio