This app is very nice but, one question... – PuzzleTiles - 15 tile puzzle Review

This app is really clean and fast so I can speed solve. My times are easy: 2.0 seconds, medium: 19.95 seconds, hard: 1:32.5, and expert 1:08. But i have a question, when i go to achievements and then game center and then leaderboards, I see a Pro and Extreme mode which people raced on so i have to ask if i have to buy the no add pack to be able to use those modes? Thank You Very Good Game! ????????
Review by Pixilkids on PuzzleTiles - 15 tile puzzle.