We have a health improvent app which targets the 89 million estimated us with prediabetes. V1 is iPhone only, 63 million users. How do we estate the total addressable market without specifying the income demographic ? Is that possible?
Can you segment by the demographic markers for the prediabetic users and then co-relate to similar groups in the prediabetes iPhone population?
If you main objective is to know if there's a market for your app, then I would suggest to log on to your iphone and search for "diabetes". Then log on to appannie.com and try to see if some of these apps are successful (check their ranking, you might need to create a free account for that). You won't be able to know how many downloads they are getting... but if I see it I might give you a rough estimation. If no apps are successful, then there is no demand