Theoretically, there's no reason you couldn't write a similar app for Android devices which support BLE[1] to reimplement this functionality, but Panic have only ever written for Apple devices.

[1] http://stackoverflow.com/questions/18906988/what-is-the-ibea...

There is a open source iBeacon library for Android:

https://github.com/RadiusNetworks/android-ibeacon-service

Decoding the iBeacon packets is quite easy, but you need a device that supports BLE. Currently there are only a handful of Android devices that support it.