Fast, offline-ready, and fullscreen experience.
Tap the Share button in Safari.
Scroll down and select "Add to Home Screen" .
Tap Add top-right to finish.
Tap the three dots .
Select "Install App". (If it says "Add to Home Screen", wait a few seconds for it to change, or click it to install).
Click the install icon on the right side of the address bar.
Confirm to launch the standalone app window.