Well you're still in very early stages. What I would do if I were you was to tap into your own personal network and see who is out there that can actually use your product.
Focus on your first 10 'clients' free or not. Then you can ask them for feedback and how to improve your app. If you don't even have a minimum viable product you have no chance with an investor so get a MVP and get 10 'clients' to try your app.
Focus on your first 10 'clients' free or not. Then you can ask them for feedback and how to improve your app. If you don't even have a minimum viable product you have no chance with an investor so get a MVP and get 10 'clients' to try your app.