To make your Progressive Web App installable on iOS, start by making sure your app uses HTTPS and has a proper web app manifest with a name and icons. If you’re working on Progressive Web App Development, it’s important to also add a service worker so your app can work offline. On iPhones and iPads, users can’t get an automatic install prompt like on Android. Instead, they have to open your PWA in Safari and tap “Add to Home Screen” to install it. https://mobikul.com/progressive-web-app/