There are many ways to encourage users to download your app on their mobiles. Here are a few tricks, and metrics you should track to gauge your success rate:
App store optimization
App Store Optimization (ASO) is a simple but very effective way to increase app downloads. It requires a sustained effort to be successful. App store rankings depend on metadata e.g. keywords, ratings, descriptions, and reviews. IN ASO you also need to consider how keywords rank in each application category. While music and simple trivia games are relatively easier to rank but categories like casual games are very crowded and are most competitive to rank for.