Weekly challenge runs for a week from a specific start date and you can compete with your friends to Top the Leaderboard! Whoever completes guessing all the drawings in the challenge in the shortest time, will be declared the winner. 

You can choose to take the challenge any day before the challenge expires. Once you have completed the challenge, you can view the time left for the next challenge to begin from the Home Page, track who finished next in the challenge through the Leaderboard, Nudge some of your slower friends who have not yet begun on the challenge or even click the users from the Leaderboard to challenge them for the normal turn play. 

There’s also an option to track leaderboard progress over a month’s time by tapping the icon to the top left of the Leaderboard screen.