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FAQ
Common questions about accounts, pricing, and the project.
Is it free? #
Yes. The app is free to use and the source is MIT licensed.
Do I need an account? #
Not to try a lesson. You need one to save progress across sessions and devices.
Can I self-host it? #
Yes. The source is public and the repository documents how to run the app and its backend yourself.
Can I contribute? #
Yes — course content, translations, and code. Open an issue on GitHub describing what you want to work on before starting anything large.
Which languages are supported? #
Korean, Japanese, and Spanish today. See the roadmap for what is queued.