🎉 We’re thrilled to launch Beeper Mini: our beautiful new Android app to message with iPhones as a legit blue bubble. Download it today on Google Play! No waitlist, no ads ever, and free for 7 days.
All messages are end to end encrypted. Also you don’t need an Apple account and it connects directly to Apple servers.
I don’t know about the app itself, but the blog article links to the PyPush python-based proof-of-concept, which you can run pretty much anywhere.