Horn is available on iOS today. Horn Free focuses on the "Prologue" section of Horn proper, allowing players to face an endless series of Titans in the new Quest mode and unlock new sets of customizable weapons and armor.
The premium version of Horn pretty much gets all the new stuff found in Horn Free: Quest mode, available as under the Challenges section for instant boss fight gratification, and new loot. This latest update also optimizes both versions of Horn for play on iPad Minis and the new iPad. We've followed up for info on whether this new content is in the Android version.