For iOS:  
  1. Go to the App Store 
  2. Tap on your Apple ID account settings in the top right corner. (It will appear as your profile picture) 
  3. Pull down to refresh the page 
  4. Find Fashion Nation in the list of updates & press “Update”.   
Alternatively, you can search for the game in the App Store and press “Update” on its Store page.  
 
For Android: 
  1. Go to the Google Play Store app.  
  2. Swipe across the screen from left to right to open the Store Home menu.  
  3. Tap My Apps. 
  4. Search for “Update” next to Fashion Nation.