Sending iOS (and Android) remote push notifications from your Delphi service with the HTTP/2 protocol
https://github.com/grijjy/DelphiRemotePushSender
https://github.com/grijjy/DelphiScalableClientSockets
https://github.com/grijjy/GrijjyFoundation
Delphi APP 開發入門(七)通知與雲端推播
http://www.codedata.com.tw/mobile/delphi-app-dev-tutorial7-notification/