If you are using the latest app version, you can see the 'Guaranteed Plus' identifier on the contest.
However, rest assured: all users can join and enjoy the rewards of Guaranteed Plus contests regardless of their app version.
See all articles 
If you are using the latest app version, you can see the 'Guaranteed Plus' identifier on the contest.
However, rest assured: all users can join and enjoy the rewards of Guaranteed Plus contests regardless of their app version.