Cortana is an personal digital assistant developed by Microsoft corporate specifically for Windows devices later version 10 in desktop and new arrivals of mobile . Which gives a tough compete Amazon and Google. Cortana desktop can sync hundreds of apps flawlessly.
Android version :
Yes !! Microsoft is going to release cortana Android version.The preview version of this app is now available in Google play store . Through cortana you can book tickets, paybill, recharge,..ect and it’s designed to sync most popular games. Other than this the mobile version can be connected to desktop version and can be accessed anywhere . Unlike amazon and Google cortana can be synced with 3rd party gadgets like fitbit,Netflix..ect in desktop version . Hope this can get better in Android since same platform can be synced actively.