Is there a way to know any App's bundle ID or App ID which is running in the foreground? I have seen this feature in this App called Backbone, which asks user to open any App, press a button on their hardware (Which is a game controller, connected to iPhone via lightning connector) and then a link/shortcut to that App gets added in their App. It seems like they are able to establish a link between their App and other Apps, based on what I know so far it is not possible without knowing the Custom URL scheme of the App.
Anyone knows if there is another way it can be done? Thanks in advance!