Install the Aviator demo on your iPhone
This is not an App Store install. Safari labels can vary between iOS versions, but the path is the same: open the menu, tap Share, then Add to Home Screen and, if iOS offers it, turn on Open as Web App.
Fastest path
Open the fullscreen Aviator demo in Safari - https://aviator-log-in.com/en/demo/app/. First open the menu near the address bar, then tap Share, scroll to Add to Home Screen, and on the final screen turn on Open as Web App if the option appears before you tap Add. If you save the icon from the demo URL, that same page stays as the start point.
Step by step
Step 1 - Open the menu
On the page you want to keep, look for the menu button with three dots inside a circle, usually near the site address bar, and tap it.

Step 2 - Find Share
In the menu that opens, look for Share. In Safari this is often the square with the arrow pointing upward.

Step 3 - Add it to the Home Screen
After you tap Share, scroll through the next panel and choose Add to Home Screen. On the following screen, if iOS offers it, turn on Open as Web App and then tap Add.
