If all the functions of your platform will be available in the smartphone, why create ATMs? What purpose should they fulfill?
Is it not more convenient to use the application on a smartphone?
ATMs can be used with cash. ATMs also perform a global marketing move.
I think that ATMs should be produced and installed in a casino.
If this is a marketing move, then it is best to install ATMs in passable places. (subway, train stations, etc.)