The digital edition of Purpose contains ten songs, while the physical release includes twelve tracks including the Gaon number-one single "Four Seasons" and its B-side "Blue", which was released as a digital single on March 24, 2019. There are three versions of the physical edition – two regular versions with the same dust cover and either a red or white hard cover book and 1 deluxe edition with a different cover, booklet and packaging style.
