Concept question

I have mobile app idea. I am not a developer. I am curious how to go about finding someone to discuss it's feasibility with. However, it's application that does not exist right now or I haven't seen it. I assume I need to have many paid meetings with developers who MAY be able to decide if app technology can be built, after signing NDA ? Wonder if there is a more efficient and perhaps cost effective way to figure this out.

Thank you.