Rewind lets you take back your last Like or Nope. If you accidentally passed on someone you wanted to get to know, they are no longer lost forever. Use Rewind to bring their profile back by tapping the yellow arrow icon on the main screen.
Only Premium subscribers can rewind a swipe, and they can only rewind their last action (Like, Nope, Super Like).
To subscribe, open Milyo > tap on 'Accounts' > Select 'Upgrade to Premium'.