Currently, EarnApp requires you to keep the application open and visible on your phone screen with the "ON" button to earn from it. If you switch to another application or visit your account dashboard, EarnApp will go offline, and you will not be able to earn from it.
However, there may be a future version of the app that will allow EarnApp to work in the background of your cellphone, allowing you to earn from the app without needing to keep it open on your screen. We are working on getting EarnApp approved on the Google Play store, and once approved, this feature may become available.