@sevan apks on github. its not officially maintained anymore, so there will be no signed APKs from me, but theres nothing stopping you from forking and submitting (as long as you abide by the license ;)
I have updated the repository to include APK builds of both versions of the apps. Version 1 [github.com] and Unreleased version 2 [github.com]. Version 2 is an alpha, but has some cool features. Both can be installed at the same time.
@schmidt_fu@duerig the apps hit the notification API to store its push token, user id and settings (also access token for muted), the notification worker runs standalone as a service which connects to the streaming API from adn and the database