Thank you for your reply.
Sorry, my request was not clear. Here is the revision, i am new to coding, i would like to know how to create a shortcut for a web app on a mobile Home screen and computer desktop by making a "CREATE SHORTCUT" button available for user to press, using a HTML script, compatible to mobile OS(Android & iOS) and Window respectively.
Users of my web app consists of majority of non tech-savvy individuals. This will help users, and me, eventually, especially reducing the explaining and training parts.
