To watch anime on any ios devices, simply go in the app store and get the app called crunchyroll. Crunchyroll is free and no jailbreak is needed. Crunchyroll has a lot of different animes. there is naruto, attack of the titan and so much more. Attack of the titan is my favorite anime. You guys should definitely watch it and let me know what you think. The downside of crunchyroll is all the anime are not in english, but they do have english subtitles.
Dont have a phone? No problem, you can watch anime online at this link: http://www.crunchyroll.com/
