Found 5 Dollars
The web app installs like a real app: icon on your Home Screen, works offline, scores sync live. Takes about 30 seconds.
Has to be Safari — Chrome on iPhone can't add apps to the Home Screen.
The square with the arrow pointing up, at the bottom middle of Safari (or top right on iPad).
Scroll the share menu down a little if you don't see it. That's it — the $5 crown icon is now on your Home Screen like any other app.