Howard told evertonTV: "The club share my ambition, that is for sure, the manager does and so do the fans.
"I was drawn to the club for a number of reasons and the players in the dressing room are one of them."
David Moyes said: "We are delighted to have signed Tim on a permanent basis. He has come in this season and proved he is a good keeper and we are pleased to have secured him."
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