Can it be done without the app? We don't have a smartphone. That's why
we bought the remote.
Do you have a tablet? Any bluetooth-enabled device with the app should work.
Of course, you can always use just the remote, but then you're limited to
just the basic functions described above: full power when the button on the remote
is pressed, and no power when it is not. In order to perform more complex functions,
you need the app and the programming capabilities that it provides. Sadly, as
far as I am aware, there is simply no way around it.
This is part of the reason why I don't collect LEGO Powered Up: I can't
guarantee that the software will continue to work decades from now.