Speech To Text App For Deaf. For the deaf, an app combining both so one could have a video call with a deaf person and that person could read your speech as text would be a great benefit to those needing to convers with the deaf. A handy application with speech to text translation for deaf people, allowing a deaf person to write a note for a hearing person.

Speaksee is a portable microphone device transcribing speech to text for group conversations of up to 9 persons in real time. Speech to text for the deaf & hard of hearing. There are also several good video calling apps.
A speech to text accessibility app from google, produced in collaboration with gallaudet university.
Teen’s act of kindness to use sign language to help blind & deaf passenger on flight. Talk to deaf contains the following functions: The app is provided free of charge and boasts impressive recognition abilities with a customisable user interface giving the option to set the displayed text size and background colour. There seem to be plenty of speech to text apps.