I don't know, those are basically the same old paradigm of separated/isolated monolithic apps. Android or iOS doesn't suddenly enable the functionality from app X to work inside of other apps unless there's a specific integration made for them.
Emacs is one environment that does it all and everything integrates with pretty much everything else simply by nature of being in Emacs. If I write a program in Emacs and it contains, for example, a function to convert a date at POINT to the correct format, this function will work everywhere else in Emacs too.
Emacs is one environment that does it all and everything integrates with pretty much everything else simply by nature of being in Emacs. If I write a program in Emacs and it contains, for example, a function to convert a date at POINT to the correct format, this function will work everywhere else in Emacs too.