The first question that comes to mind is if this is a passive device, paired with your phone, then it is just a microphone. Why build a new device for that?
the new device would be to avoid the constraints of Apple. Apple wouldn't allow an app that is always listening to you to run, unless it's always open which isn't user-friendly at all.
there's a reason why all these companies are coming out with their own hardware. Apple severely limits your ability to create these as apps.
there's a reason why all these companies are coming out with their own hardware. Apple severely limits your ability to create these as apps.