Not good..
App has a lot of promise but after playing for a few minutes, it will inevitably freeze on the screen to select ships to send into battle. After it force closes, you cant play for an hour because it says you have a second instance of the game running.
Furthermore its 1/3 chance of the ubisoft server is up. If its up, you can log in, if not.. Your stuffed. If your in and it goes down(which happens a few times a day) it will force close the app and add another hour that you cant play due to duplicate instances of the game.
This app has promise, but ubisoft needs to fix the disconnect/duplicate instance/shoddy server issues before its really usable.
Pillowthrust about
Assassin's Creed IV® Black Flag Companion