Microsoft Cortana for Android v1.8.5.1139-enus-release
Requirements: 4.0+
Overview: Microsoft’s digital assistant software Cortana is set to serve as the ghost in Android machines

After announcing at E3 that the digital assistant is set to arrive on Xbox One in the US and UK... http://www.apkformod.com/microsoft-cortana-for-android-v1-8-5-1139-enus-release/