Square Enix announced a while ago that the Final Fantasy XIV: A Realm Reborn smartphone companion app Libra Eorzea would be made available for free to those that purchased the game, but never officially announced a release date.
Well, looks like that release date is today, as the app is now available for iOS devices on the iTunes store. You can find it here, or by searching “Libra Eorzea” on your device.
Libra Eorzea allows you to access your character stats on the go, and to get relevant info on quests, items and more by accessing a large database. According to Square Enix, features will be expanded in the future, and the Android version should be released shortly after the iOS one. Below you can see some screenshots of the app.