Just last November 2014, Microsoft launched the Office Preview for Android tablets to a limited audience. One needs a sign up and wait for an invitation, but not anymore. The Office Preview can now be downloaded directly from the Play Store.
There is catch though, only ARM-based Android tablets running on the latest versions of KitKat (4.4) or Lollipop (5.0) can use the said application. The tablet should also have a screen size between 7 and 10.1 inches. Jelly Bean tablets or earlier are not compatible.
With this latest Office software, the features found in iOS and Windows platforms are primarily on board. Updates should also come early due to the unification done by its developers.
Source: Android Authority