怪兽ABC vs RepeatDuck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
怪兽ABC
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进入双语世界,足不出户,就能体验原汁原味的英文社区,海量英文知识和资料等你来学习,智能的难度分级视频推送,耳濡目染建立英文社区,来怪兽ABC享受高品质的美式英语交流。
RepeatDuck
Master Chinese vocabulary with intelligent flashcards and spaced repetition. Features audio-based memorization, custom card creation, and detailed progress analytics. Learn efficiently with offline access and customizable reading modes.
- Audio-based memorization
- Custom flashcard creation
- Spaced repetition system
- Progress tracking and analytics
- Offline mode
- Configurable learning languages
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RepeatDuck is an innovative Chinese vocabulary learning app that makes word memorization effortless and engaging through intelligent recognition, personalized flashcards, and a unique spaced repetition system. With its distinctive card creation method and scientifically-proven review algorithms, RepeatDuck helps you master Chinese vocabulary efficiently. 【Core Features】 1. Powerful Effortless Learning Method - Audio-based Memorization: Intensive repetition of word pronunciation enhances memory retention and helps master correct pronunciation - Dynamic Word Display: Innovative dynamic word presentation reinforces memory retention 2. Extensive Learning Content - Comprehensive Vocabulary Lists: From elementary to university level, extensive word lists help expand your vocabulary across all levels - Custom Flashcards: Support manual creation and image-based custom flashcards for personalized learning experience 3. Rich Statistical Analysis - Learning Metrics: Comprehensive tracking of vocabulary progress, learning indicators (word count/duration), and achievement milestones - Visual Analytics: Learning activity heatmap, progress trends, and mastery level trends presented through intuitive charts 4. Thoughtful Additional Features - Offline Mode: Core features available offline for learning anywhere, anytime - Configurable Learning Languages: Easy switching between target languages, currently supporting Chinese and English - Customizable Reading Modes: Flexible configuration for playback methods (single/loop/sequential/random) and reading styles (single word/bilingual) 【RepeatDuck Auto-Renewal Subscription Service Details】 1、 Subscription Service: Professional Version Continuous Package Service 2、Subscription Pricing: Monthly subscription at $0.99/month, Annual subscription at $4.99/year 3、Payment: Purchase will be charged to iTunes Account upon confirmation 4、Your iTunes account will be charged 24 hours before the end of the current period, and the subscription will be extended by one subscription period upon successful payment 5、To cancel subscription, please go to iPhone "Settings" --> "iTunes Store & App Store" --> tap "Apple ID", select "View Apple ID", enter "Account Settings" page, tap "Subscriptions", select "Monthly/Annual Subscription" to cancel. If you don't turn off auto-renewal at least 24 hours before the end of the current period, this subscription will automatically renew Privacy Policy: https://mileson.notion.site/Privacy-Policy-RepeatDuck-17ee107ce54f80758c1dd3f5f6272435?pvs=4 Terms of Use: https://mileson.notion.site/Terms-of-Use-RepeatDuck-180e107ce54f806f9fe7f57290dd04ba?pvs=4 If you enjoy "RepeatDuck", please take a moment to write us a positive review. We greatly appreciate it! Email: libingfeng007@gmail.com
Screenshots
Verdict
The clearest difference is in-app purchases: 怪兽ABC at none against RepeatDuck's 3. 怪兽ABC also leads on update cadence (monthly vs every 2 months) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. RepeatDuck sells 3 in-app purchases, starting at $1.99 per month. 怪兽ABC asks for nothing beyond the download.
怪兽ABC ships an update monthly, RepeatDuck every 2 months. The most recent releases landed on September 11, 2026 and September 17, 2026 respectively.
| Parameter | 怪兽ABC | RepeatDuck |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 201 MB | 147 MB |
| Age rating | 4+ | 4+ |
| Developer | Henan Zhongyu Technology Co., Ltd | Chaojifeng (Xiamen) Network Technology Co., Ltd. |
In-app purchases
怪兽ABC
No in-app purchases
RepeatDuck
- Monthly Pro$1.991 Month
- Yearly Pro$9.991 Year
- Lifetime Pro$19.99









