App marketing roadmap

I made the app called Eyescream this year (http://eyescream.devss.io/) after just one google ads campaign I got 800 new users within the span of 6 days and the campaign cost me around 6000 INR. I got the result with that single campaign but what could be my other ways of marketing how should I group my marketing budget? Can you tell the marketing roadmap you would have followed?

Thanks