[syedmsawaid]

How can one integrate it into his own android app?

[binwiederhier]

To publish, just PUT/POST via your favorite HTTP library, or publish via intent (https://ntfy.sh/docs/subscribe/phone/#automation-apps).

And to subscribe, either use UnifiedPush (https://unifiedpush.org/), or use intents (see link above). Or, implement your own foreground service with WebSockets (just like the ntfy app does).