ex voice application

I have come up with an idea that

when we call to deaf and dumb person, as they cant hear and give a reply to us

so i want to develop an app like this " when we call a deaf person the information which we give should be converted into text format and there text should be converted into voice or it can be either in text itself people can read can read the text.

Can we develop such app using MIT App inventor. is there a possibility in this 

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How does the deaf person know he is getting a phone call or receiving am sms (text) message?   That is a problem.

1)  when we call a deaf person the information which we give should be converted into text format   .  For this you would have to use the speech recognizer object.  It converts spoken

words into text.  However, I so no to implement that with AI2.  Perhaps someone else has an idea?

2) there text should be converted into voice.  You can convert a text that is inside a TextBox by using the TextToSpeech Component, but I do not know if the phone would be able to use it.  You would have to try.  I expect this is not possible to use in conjunction with the phone, but you could try.

3) or it can be either in text itself people can read can read the text.     Why not just send the person an sms text message  and let them reply with a text message.  Have you thought about developing a Chat app with the  FirebaseDB t?  This is not a phone call but a chat app using WIFI.

Assuming you can solve some problems here is an example you might be able to modify to allow the person that receives a text message

No Text While Driving for AI2

Busy driving or in a meeting? Set this app to auto-respond to incoming texts by sending a reply text and also speaking the incoming text out loud.

This MIT app does NOT do what you want to do but the tutorial does use some of the components that would be necessary to use sms messaging.

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