# duiduidui! — Chinese dictionary + AI tutor

> Chinese dictionary and AI tutor with adaptive learning tools for all levels. (iPhone/iPad app by Red Thread Labs LLC.)

- Source: https://appshunter.io/ios/app/duiduidui/id6771224415 (this page in markdown: same URL + `.md`)
- Developer: [Red Thread Labs LLC](https://appshunter.io/developer/1896775112)
- Category: Education, Reference
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 12+
- Requires: iOS 16.4 · 111 MB
- Languages: American English
- Released: 2026-07-09
- Data updated: 2026-08-22
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/duiduidui/id6771224415/reviews.md

## What is duiduidui!?

duiduidui! is the Chinese learning app that actually keeps up with you.

At its heart is a comprehensive Mandarin dictionary — over 200,000 words and phrases, with pinyin, natural-speech audio, and example sentences for every entry. It goes well beyond the textbook, covering modern vocabulary, colloquial speech, and the slang people actually use online and in everyday conversation. Look anything up, tap to hear it — and it all works offline, so your dictionary is with you on the subway, on a plane, or anywhere the signal drops.

But duiduidui! is more than a dictionary:

• Your own phrasebook — Star any word or phrase to build a personal phrasebook of favorites, always a tap away and ready to review whenever you want.
• AI tutor — Chat in Chinese or English with a patient tutor that explains grammar, corrects you gently, and answers "but why?" as many times as you need.
• Snap to translate — Point your camera at a sign, a menu, or handwriting and get an instant translation.
• Adaptive flashcards — The review system tracks what you actually know and steers you toward the cards you're ready to learn next — never too easy, never overwhelming.
• Real progress — Watch your vocabulary, streaks, and skill level grow, session by session.

How it works
duiduidui! learns your strengths and gaps as you study, then balances new words against review so you stay in the sweet spot for learning. The more you use it, the better it fits you.

Start with a 7-day full-access trial — the entire dictionary, the AI tutor, and adaptive flashcards, free for a week. No commitment up front.

Whether you're learning your first character or polishing toward fluency, duiduidui! grows with you. 对对对 — "right, right, right."

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Subscription details:
• After the free trial, duiduidui! offers Monthly ($12.99) and Annual ($89.99) subscriptions.
• Payment is charged to your Apple ID at confirmation of purchase.
• Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period.
• Manage or cancel anytime in your Apple ID settings.
• Terms of Use: https://duiduidui.app/en/terms-of-service/
• Privacy Policy: https://duiduidui.app/en/privacy-policy/

## Key features

- Comprehensive Mandarin dictionary
- AI tutor for grammar and conversation
- Personal phrasebook
- Camera-based translation
- Adaptive flashcards
- Offline functionality
- Progress tracking

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $12.99 | per month |
| Annual | $89.99 | per year |



## Frequently asked questions about duiduidui!

### What is the learning methodology used by duiduidui!?

duiduidui! employs an adaptive learning system that tracks your strengths and weaknesses. It balances new vocabulary with reviews, ensuring you stay in an optimal learning zone. The AI tutor provides personalized explanations and corrections.

### How does duiduidui! track user progress?

The app monitors your vocabulary acquisition, learning streaks, and overall skill level. This data is used to tailor the adaptive flashcards and review sessions, providing a clear view of your advancement.

### Does duiduidui! offer certifications?

The provided information does not mention any certifications offered by duiduidui!. The focus is on vocabulary building, grammar, and conversational practice to achieve fluency.

### What are the subscription options for duiduidui!?

After a 7-day free trial, duiduidui! offers Monthly subscriptions for $12.99 and Annual subscriptions for $89.99. Payments are charged to your Apple ID.

### How can I cancel my duiduidui! subscription?

You can manage or cancel your subscription at any time through your Apple ID settings. Cancellations must be made at least 24 hours before the end of the current subscription period.

### Is duiduidui! available on Android devices?

Based on the provided data, duiduidui! is currently supported on iPhones. Information regarding Android compatibility is not available.

### How often is duiduidui! updated?

The latest version of duiduidui! is 1.0.0, and it was last updated on 2026-07-10. This indicates a recent update, suggesting the app is actively maintained.

### What is the age rating for duiduidui!?

duiduidui! has an age rating of 12+. This suggests it is suitable for users aged 12 and older.

## Version history (last 2 releases)

### 1.1.0 — 2026-08-19

What's New in 1.1.0

• Dictionary download now recovers from connection hiccups, shows progress, and says clearly when you're offline

• Starred words and review progress sync reliably, including after a reinstall or device switch

• Profile photos upload and appear for your study partners

• Fixed a crash when signing out and back in

• Fixed phone-number sign-in occasionally rejecting a valid number

• New setting: turn off content warnings on dictionary entries

• Flip-card controls now always respond

• Search and dictionary layout refinements

• Framework updates for performance

### 1.0.0 — 2026-07-10

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*