Who is my app for?

I don't mean to be vague, but everyone.

The issue I have with targeting a certain audience for my product, is that it reaches out to people with mental health issues - which is one in four globally. I have a huge global audience this can be relevant to, and an approximate of that audience is 450 million people.

However, I won't be able to reach that many people as there are complications, like language barriers and such. Though this narrows down my possible audience, I still can't narrow that down to how old my audience is and what they earn.

I first started with some research. I wanted to focus on young adults, at first, as they would be the ones using apps more regularly. I found that the increase of young adults and children being admitted to the hospital, over the last decade, was 68%. Another statistic was that over half of adults suffering with mental issues were diagnosed in childhood, and at least 80000 children and young adults are suffering from severe depression. Source: http://www.youngminds.org.uk/training_services/policy/mental_health_statistics

These statistics helped me to realise anxiety and depression, and other mental issues, was serious in young adults and children. Considering that 18-24 years old was the age group that spends the most time on apps on mobile devices, I decided to aim my product at 16 - 25 year olds. However, this does not mean I won't have features for older or younger people, as mental health issues is something that affects everyone, and I don't want to exclude anyone at all. Source: http://www.businessofapps.com/app-usage-statistics-2015/

So, I decided to do a survey. This was to gather information about people's interest in my product, whether they would use it (and pay for it), and whether they suffered at all from mental issues. I am still getting responses, but it seems most of people responding are 15 - 19, and only 15% don't suffer from any mental health issues. Again, 39% don't want to see a doctor or therapist though they suffer symptoms. This helped my to add an app disguise to the features of my app - (one of which 61% would feel is useful). So far, the more important features are a mood tracker, and a progress report - and I've also received suggestions.

Take my survey here: https://goo.gl/forms/dcUWSDi1weSeuttd2