The iOS trilogy includes the first three Phoenix Wright games, Ace Attorney, Ace Attorney Justice for All, and Ace Attorney Trials and Tribulations. The initial two episodes of the first game, Ace Attorney, are free, and the remaining three episodes in that game are $6. The following two games are $7 each, or there's a pack that includes all of the games and all episodes for $17.
Got all that? Dang, legalese is confusing.