A splashscreen is an image that is displayed when your app is opened. It is a nice way to inform users of the loading process while the app is opening. 

How to add the splashscreen:

  1. Open your app and navigate to the Publish section.
  2. Open the App Vitals section by clicking on "More"
  3. Upload your splashscreen images by clicking on the "+" placeholders under "Splashscreen"

NOTE: To change the splashscreens of your app a store update is required.