AirBubble is a free Android app developed by BubbleSoft that allows users to stream audio from AirPlay clients such as iTunes, iOS, and Airfoil to their Android devices. It works in the background, allowing users to play music on their Android devices while streaming from AirPlay applications. AirBubble is a fully-featured app that can be started on boot, supports audio focus, and can be configured with a customizable network name.

AirBubble also supports tethered USB or WiFi connection, although it may require a rooted device in some cases. However, it has some limitations, including its inability to play videos and to sync with other Airplay receivers. Additionally, it does not work with RaopX on MacOS X and the raop module for pulseaudio on Linux. Unfortunately, it is not yet compatible with GoogleTV.

AirBubble is a versatile app that can be used in many ways, including streaming iTunes music to Android devices with Hyperfine Remote for iTunes, using it as a wireless speaker or headset, or even repurposing older or broken Android devices as a dedicated networked speaker.

Overall, AirBubble is a reliable and useful app for those looking to stream audio from AirPlay clients to their Android devices.