This evening I pushed a #Prosody community module that acts as a #UnifiedPush server. It allows apps on your phone to receive push notifications, using #XMPP as the delivery channel instead of Google's proprietary FCM or regular polling.
It uses a protocol devised and implemented by @daniel and all credit goes to him for this idea and first implementations.
It's all experimental stuff, but I'm already using it to get realtime notifications in #Fedilab ?