Hey even i thought of making a app, something like this but more of a goal app, so daily you get a set of challenges and exercises to do. Like the challenges start easy, ask from 3 random strangers the time etc. Also including breathing exercises and good talking practices in general. Every challenge you complete you get points. Goal is to try and collect as much points as possible. What can you do with those points? well even i'm not sure how to use it other than it just being there for the purpose of collecting as much as possible of it. Maybe even have a score board between other people who get stuck when speaking. Basically try and make it as much as a game as possible. When its a game people will be more likely to do it and stick with it. No wonder we love playing games in our spare time and even if we have work to do :P haha. Another idea i have is a mock call feature, where it emulates a call with someone (with prerecorded dialogs) and the other person talks and keeps the conversation going. Im sure many of us have a super hard time with answering calls, so i feel like this could help ease them into talking on the phone. Ofcourse since you are making it intractable you could implement a minute call with a random person, where a topic pops up and each person has a minute or more to say as much as they can, Eg: talk about your favorite animal! all in all goodluck on your app !!! :D