Web Push For Web Apps

The idea is:

Visitors can subscribe to webapp`s to receive notifications and reminders.
This is already possible on Android, PC and MAC, but this year’s news is that it will be added to iOS:

My use case:

If my visitors want to be notified about updates to a calendar of events, push notification is great for that.

I think it would be beneficial to add this because:

It has no cost, it has been around for almost a decade and can be an alternative to email, whatsapp, sms…

Any resources to support this?

Are you willing to work on this?

I don’t know how I could help, I’m not a programmer.