I have a feeling that the founders of this and the Humane pin know deep down that if they allowed any app-connection to a phone, it would make it even more obvi

I have a feeling that the founders of this and the Humane pin know deep down that if they allowed any app-connection to a phone, it would make it even more obvious to the users that the product is useless as the phone can do everything and far better. So they have actively decided to not allow it.