Cortana, Microsoft Digital Assistant is coming to Android and the beta version will be released in July to test as a companion to Windows 10 PCs. Cortana will be connected to user’s Microsoft account to keep cross-platform features in sync. Cortana will be able to work across PC, Xbox One and mobile 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 will interrupt playback to let you know it’s time to take the dog out.
Cortana will be introduced to iOS when the date near of the Windows 10 launch.
Source: Android Central