If you check the How it Works post, they do show the Beeper Push Notification Service running in the cloud [1] to intercept 'new message available' APNs and the

If you check the How it Works post, they do show the Beeper Push Notification Service running in the cloud [1] to intercept 'new message available' APNs and then notify the Android device a new message is available. [1] https://blog.beeper.com/p/how-beeper-mini-works https://blog.beeper.com/p/how-beeper-mini-works