No app store needed. Save the shop to your home screen and it opens fullscreen with its own pink heart icon, like any app. Takes about ten seconds.
There’s no link to press and hold. The magic lives in your browser’s Share or menu button. Pick your device below and follow along.
Step 1. Tap the Share button at the bottom of Safari (the square with the arrow pointing up).
Step 2. Scroll down and tap "Add to Home Screen."
Step 3. Tap "Add." The pink heart appears on your home screen as TriValley Porch, and it opens fullscreen like an app.
Saved it before and see an old icon? Delete it from your home screen and add it again to get the latest look.