A local transcription, manually triggered service would solve the concern I think.
> You don't need a more privacy focused app, you just need another app and probably to become a customer so you can get the support you clearly want.
I think there's a difference between free users with a "hey, my app is broken" complaint and "hey, you just did something incredibly wrong" complaint. It would be like if free Dropbox started uploading random files that it wasn't allowed to in the settings.