About WiFi Ear
Listen to any important conversation without join physically. You can set your one Android device as Microphone device and another as Speaker device remotely. Microphone device will stream audio and Speaker device will play that audio live. So, you can hear without join physically any meeting that is important for you.
You can also turn your phone into a baby monitor. Listen to your baby when you are away. You can set your one Android device as Microphone and another as Speaker. Microphone will stream audio and Speaker device will play that audio live.
by Q####:
Hope the Dev brings material design in next release. :)