Yeah, you do know. You can’t do it.

TBH, I think you’re barking up the wrong tree — though the correct tree is just one tree to the left. If your “management” is serious about try to help people in a potentially life-or-death way, then I think your project should be not just an *app* slammed together from whatever pre-built pieces happen to be lying around, but a server with client interface(s). You already said as much: you’d use an existing back-end solution via HTTPS API if you could find one.

So, move your problem into a server that can make calls and/or send SMS messages and/or interface with whatever paging servers you can find, have your iOS client app talk to the server using the interface iOS does best — HTTPS.

Of course, having your own server is a much bigger deal, apart even from coding, because you need to deal with hosting, security and stability. But that was my point about being serious. If you’re only going to save lives if it doesn’t cost you any real effort, I don’t think you should be in that business.

This just FWIW, of course.