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Find answers to common questions about LockN

What are CEFR levels and which should I choose?

How does the streak system work?

What's included in Premium?

What happens to my data if I cancel Premium?

What does "mastering" a card mean?

Can I reset a stack to study it again?

What are character breakdowns and romanization?

What are script preferences?

What information is visible on my public profile?

The audio isn't playing. What should I do?

I'm not getting the exact number of cards I requested. Why?

Can I export my flashcards?

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