Android

1. Visit the Home screen page on which you want to stick the app icon, or launcher
2. Touch the Apps icon to display the apps drawer
3. Long-press the app icon you want to add to the Home screen
4. Drag the app to the Home screen page, lifting your finger to place the app

iOS

1. On your iOS device, open your Safari browser and go to the page on your site that you would like to make a shortcut for
2. Click the share icon in the browser
3. Select the option Add to Home Screen
4. On the Add to Home page you should be able to see the icon you uploaded on the left.