@davy. It's a commercial app, first one on a list so if they didn't answer your question, move to the next one. Too bad you weren't on Android and possibly iOS where it appears some speech to text shows up in your apps.
I think it's worth repeating. I fear you are going to have to get into a paid app for this one unless there's some Google voice, Amazon Alexa or other integration I'm not aware of is out there.