Hi, I'm New to hacker news, but I also built an android app on the side and have 20ish downloads. I built it all myself and it cost only a couple hundred dollars. However I can't get users to stay. Most of the 20ish users installed it and then didn't play. So my question is what is your plan to get users to download and keep them interested? My app took about 4 months and I build it using Xamarin.Android. I don't want to break any forum rules by adding a link to my app, but I would be interested in getting some direction for marketing and feedback.