Sales Strategy and Advertising for Mobile Application

Hello, I am the owner of mobile application visitme. This mobile application has two interfaces. the one interface is that you can log in and make a provider account with job details and everything. The other type of account is a simple user account. This is for free, the simple users can search for a specific type of provider and they get their result through radius search and also we provide intstant messenger to those two. The Provider pays 24€ per year or 14€ per Six months to be active in the map. The app started from 0 and it's a little difficult to sell this , however is one of the best apps that exist in my country and many countries for it's tecnology.