Okay so I am in high school currently developing an app with my friend. The app should be done and in the app store in about 14-18 days. Its .99 cents and a pretty basic app. It's a soundboard with certain nature sounds and around 20 of them which we plan to expand on in the further with updates. It looks very professional and is fun to mess around with. Based off of your previous experience selling apps how many do you think I can sell within 3 months with heavy promotion and advertisement to friends, family, and on forums, etc.... honest opinions are greatly appreciated.