You're going to get sued in the US if you try to market this thing and require voice input. This is potentially a huge accessibility issue.

You've essentially eliminated (most) people who are deaf and people with speech issues from being able to use your product.

It's a neat idea and the design looks like it could be nice but I can't really get past the first page because I cannot use it (no mic attached to this device and I wouldn't want to grant you permission to it anyway.)