Knack's Quest, a companion app for PS4 launch title Knack, is now available as a free download on iOS, Sony has announced.
Knack's Quest is a puzzle game in which you collect three or more of the same type of parts. Collecting parts will make Knack grow larger - reach the maximum size within the time limit to clear the stage.
Items discovered in the app can later be used within the PS4 game - item send functionality will be made available in the next software update.
Knack launches alongside the PS4 on November 29.