At the moment Safari on iOS doesn’t support web push notifications.
We’ve all been there: you have built a great web app, optimized for mobile, but you have to build a native or hybrid web app just to send push notifications.
Fortunately, thanks to the new standards, like the Push API, Service Workers and Web Notifications, you don’t have to build an app only to have the ability to send push notifications. Now websites can send push notifications directly, even when the user is not surfing the website.
Awesome! The problem is that web push notifications work on Android, but not on iOS!