When I was in my second year of university I published on the Google Play Store a small app about timezones, made for an academic assignment. The app was published just for fun. In the first months, the app barely made it to 30 installs per month. Two years and a lot of coding later, the same app has ~500 daily installs, over than 40.000 monthly users, and it is in the top 200 apps for many countries. All of this without spending a single cent on marketing. But how did this happen?

In this talk, you will know about my experience on developing this application and some tips and tricks, from app architecture and technologies to market analysis and ASO, on how to successfully develop and promote an app without spending any money for advertisement, hoping to make your app rising up on the top charts.