Silver apple
From YPPedia
The silver apple is a trinket that was given to players logging into the game from an iPad between the 20th and 24th of June 2013. It could be won by only one pirate per account. Along with the red apple, it was awarded as part of the launch of Puzzle Pirates on tablets in June 2013. It exists only in one color, can not be traded, and is no longer available.