Support

Need a hand with duiduidui!? We're happy to help.

Contact us

We aim to answer support email as quickly as we can, and to respond to abuse reports within 24 hours.

Frequently asked questions

How does the free trial work?

Every new account starts with a 7-day full-access trial: the complete dictionary, the AI tutor, and adaptive flashcards. No payment information is required to start, and nothing is charged during the trial.

How do I subscribe?

After your trial, you can subscribe to a Monthly or Annual plan from within the app. Subscriptions are billed through your Apple ID.

How do I manage or cancel my subscription?

Subscriptions are managed through Apple. On your device, open Settings → [your name] → Subscriptions, choose duiduidui!, and change or cancel your plan there. Your access continues until the end of the current billing period.

How do I restore a purchase?

If you reinstall the app or switch to a new device, open Settings inside duiduidui! and tap Restore Purchases.

Does the dictionary work offline?

Yes. The full dictionary (including pinyin, definitions, and example sentences) works without a network connection. Audio is streamed on demand and cached for offline replay.

How do I delete my account or data?

Email privacy@duiduidui.app from the address associated with your account and we'll process your request in accordance with applicable law.