How can the Web App be stored on the homescreen under iOS?
A web app can be easily stored on the iPhone’s home screen under Apple’s iOS operating system. Once you’ve launched the web app in your browser, simply tap on the small upload icon (square with arrow) located in your open browser tab.
Scroll until the homescreen appears and tap it. The web app will be displayed with an existing name. Alternatively, you can give it an individual name. Click Add to confirm and the web app will appear on your homescreen.