So essentially, it's like this?

"we plan on users having a phone to connect to it and use primarily. FDA requires a primary/backup. well it's already phone-controlled, go find a phone that works with it. needs to be cheap, cuz no one will really use it anyway"

That makes a little more sense. I was imagining the development process involving both devices, rather than one device first, then determining what the second would be later.

Thanks for the insight!