App stores are the most important places for app discovery. It is essential that your app name and description are key-word intensive and relevant to maximise downloads.
Develop customer advocates and gather positive user reviews on app review sites (that your app is available on). Positive reviews build trust in potential users, so find a way to encourage happy users to leave reviews, (keeping in mind that continual reminders to rate apps may turn away some users).
Create a launch campaign to maximise your app launch. Here are some ideas;