Sphero's BB-8 droid was missing the ability to take voice commands on Android. Now, that's changed as a new update for its Android app allows for voice interaction. You can now command your little droid to "go explore," among other things. The latest app update also fixes some communication issues between the smartphones and droids. It's also now compatible with more Android phones and tablets. 

Source: Android Central | Download: Google Play Store (Free)