If you are looking for instructions for Android, click here.
Navigate to the Vision Portal
Tap the "Create Shortcut" button. It's at the bottom of your screen in the center, and it looks like a square with an arrow pointing out of it.
Tap the "Add to Home Screen" button in the menu that pops up.
Tap the "Add" button in the new screen that appears.
Congratulate yourself. You did it!