I would suggest a 2 phased approach. 1: submit to a selection of around 50 Beta users, with the provision that with deep insights on its functionality, you offer them incentives for their feedback. This is a time limited event. With the feedback you engage the appropriate changes, but pay special attention to monetizing the app, and create a payback chart and a rollout timetable. Layout on paper rhe target market, how you plan on monetizing, and where your income roi will look like. Armed with this knowledge, then you can release a preview look to potential investors and have real data and income to show for your effort. I would suggest a small close group of investors, not VC or Sharks at this point. Focus on getting your income engine purring asap, and you'll have a winner.