If you want to review the words or sentences that are learned, you need to:
1. Go to the "You" tab.
2. Tap on "Review".
3. Choose what you want to review: Words or Sentences.
4. Tap on the "Learned" tab.
5. Choose the topics/ subtopics you want to review.
6. Tap the "Review" button. 
You can also watch our video tutorial on how to review the words or sentences that are learned here.
What is a Review?
Why is the Review empty?
How do I know I have learned a word or sentence?