Microsoft has revealed that a beta version of Cortana, their digital assistant (none of which I can get to work right), will be available for Android users sometime in July – as a Beta. This means that the Cortana version for Android won’t have all of the features of the one that’s already available for Windows Phone 8.1 and Windows 10.
However, it will be more of a “companion” app for people who have Windows 10 PCs and want to sync information across a number of platforms.
“On your Android phone you can ask Cortana to remind you to walk the dog at 8pm in the evening, and then when you’re watching a movie your Xbox for example will interrupt playback to let you know it’s time to take the dog out.”
Source – Phonearena