Can I use it on WhatsApp as well?
I can launch WhatsApp bot as a test, but I'm afraid it will not survive long.
There is no official api and WhatsApp actively ban bots.
also.. and even better if we can get seperate notifications on our mobile also. I mean if we don't have messangers we should still get notifications on our mobile.
It is not possible to receive notification without some application.
Alternatively I added support thru push notifications in browsers.
Works in latest Firefox(desktop) and Chrome(desktop/android)