I am struggling to sort through the options for building an application that can send and receive messages peer-to-peer to any device connected to any network anywhere in the world. I know I will likely need a relay server to handle DNS and I will also need to handle changing IP addresses as mobile devices move around and their IP address changes. What I am puzzled about is I've read up on Bonjour and on the Network framework and it appears to me (and I may be wrong) that these capabilities only support either devices on the same local network, or devices that are in close proximity to one another. For an iOS application, what is the recommended service or framework to use to build the send/receive functionality in the app? Is it even possible? Thanks!

I cannot renew my membership after it expired in January of 2025. I initially let it lapse, but I decided to renew it. There is nowhere to renew it. There is no renew button in the Developer App, and the web application tells me it expired, but doesn't provide an option to renew. It just tells me to go to the Developer App and click on the Renew button which isn't there.