Receive Push Notifications directly to the iOS (not linked with an application)

Question

Any way we can achieve this, just need a basic approach, no need for codes or anything like that but some kind of conceptual guidance.

Step#1 User walks into a specific location where the Shop ABC is located

Step #2 At that particular moment, some kind of device (iBeacon, Raspberry PI or something like that) recognize that this particular iPhone device is in close proximity and it sends a HTTP request to a third party server with some information.

Step #3 Third party server sends a notification to the device that it should download the ABC shop's app

OR Raspberry PI or iBeacon identifies the device proximity and sends the same notification directly to the iPhone device without contacting the third party server.

Answer 1

No, you must have an app configured to receive push notifications. Otherwise people would be getting unwanted push notifications from everyone. Also, in order to send a push notification you need to get the Device ID which you can only get with an app that you write that then transmits it to your server.