Support

Have a question, found a bug or want to suggest an improvement? Email us and we'll get back to you as soon as possible.

I bought Radicals Premium and it doesn't show up

Go to Progress → Settings → Restore purchases. Make sure you are signed in with the same Apple account you used to buy it.

How does the app decide which words to review?

ChinaFlash uses FSRS, a spaced-repetition algorithm: each word comes back right before you would forget it. Just flip the card and swipe right if you knew it or left if you didn't.

How do I change the theme?

Tap the palette icon on the home screen (or go to Progress → Settings). With “Automatic”, the app uses Rice paper by day and Ink at night, following your iPhone's mode.

Where is my progress stored?

On your iPhone. You don't need an account or an internet connection to study.

Can I use the app in Spanish?

Yes. ChinaFlash follows your iPhone's language, and you can switch between English and Spanish in Settings → Language.

When are the next levels coming?

HSK 3, 4, 5 and 6 will be added in free updates.