To address all important parameters to maximise your potential of success when launching an app, an interesting checklist to follow:

https://branch.io/resources/app-launch-checklist/#plan&

Xavier Marvaldi

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store