Comparison

CapWords vs RepeatDuck

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CapWords

Capture words from real life using your camera and instantly create smart flashcards. AI provides definitions with context, and a spaced repetition system helps you remember them. Perfect for students, travelers, and professionals looking to expand their vocabulary.

Highlights
  • AI text recognition from photos
  • AI-powered definitions with context
  • Photo-linked vocabulary flashcards
  • Intelligent spaced repetition review
  • Progress tracking
  • Offline word bank
  • Multiple language support
Features
Currently charting
Read full description

⊕ Apple Design Awards 2025 Winner ⊕ App Store Awards App of the Year ⊕ App Store APP OF THE DAY ⊕ App Store Editor's Choice Turn the world into your vocabulary book. CapWords is the first app that lets you capture words from real life and instantly turn them into smart flashcards. See an interesting word on a sign, book, or screen? Just snap a photo, and CapWords will recognize the text, provide AI-powered definitions, and add it to your personal vocabulary library. HOW IT WORKS • Point your camera at any text • AI instantly recognizes and extracts words • Get smart definitions with context • Words automatically saved to your vocabulary • Review with intelligent spaced repetition WHY CAPWORDS? Traditional vocabulary apps make you type words manually or browse pre-made lists. CapWords changes that completely. CAPTURE FROM REAL LIFE See a word while reading, traveling, or studying? Snap it. The photo becomes your memory anchor, helping you remember where and when you learned each word. AI-POWERED UNDERSTANDING Our AI doesn't just give you dictionary definitions. It analyzes context from your photo to provide relevant meanings, example sentences, and usage notes. SMART REVIEW SYSTEM Forget about forgetting. CapWords uses spaced repetition algorithms to remind you to review words just before you'd forget them. VISUAL MEMORY BOOST Studies show visual context dramatically improves retention. Each word stays connected to the image where you found it. PERFECT FOR ⊕ Students - Build vocabulary from textbooks and articles ⊕ Travelers - Learn local words from signs and menus ⊕ Readers - Capture unfamiliar words from books ⊕ Professionals - Master industry terminology ⊕ Test Prep - GRE, TOEFL, IELTS vocabulary building FEATURES ⊕ AI recognizes words instantly ⊕ Photo-linked flashcards ⊕ Spaced repetition review ⊕ Progress tracking ⊕ Offline word bank ⊕ Export to other apps ⊕ Multiple language support LEARNING BACKED BY SCIENCE CapWords combines three proven learning techniques: 1. Visual Association - Images boost memory retention by 65% 2. Active Capture - Finding words yourself beats passive lists 3. Spaced Repetition - Review at optimal intervals Stop typing words into apps. Start capturing them from life. Download CapWords and turn every moment into a learning opportunity. FEEDBACK & SUPPORT Questions or ideas? We’d love to hear from you: support@capwords.app LEGAL Privacy Policy: https://capwords.app/privacy Terms of Use: https://capwords.app/terms

About

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.

Highlights
  • Audio-based memorization
  • Custom flashcard creation
  • Spaced repetition system
  • Progress tracking and analytics
  • Offline mode
  • Configurable learning languages
Features
Read full description

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

CapWords4 screens
RepeatDuck4 screens

Verdict

The call

The clearest difference is update cadence: CapWords at every 5 days against RepeatDuck's every 2 months. CapWords also leads on ratings volume (614 vs 1) and chart position (#190 vs unranked). RepeatDuck's advantage is rating (5.0 vs 4.7) and iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CapWords sells 6 in-app purchases, starting at $4.99 per month and RepeatDuck sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

RepeatDuck holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CapWords has 614 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

CapWords ships an update every 5 days, RepeatDuck every 2 months. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

Scorecard5 real differences · 6 level
CapWords versus RepeatDuck: the parameters behind the verdict, then further details
ParameterCapWordsRepeatDuck
PriceFreeFree
Rating4.7 (614 ratings)5.0 (1 ratings) — better
Positive reviews72.1% of reviews—
Number of ratings614 — better1
Update frequencyEvery 5 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#190 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size265 MB147 MB
Age rating4+4+
DeveloperHappyPlan TechChaojifeng (Xiamen) Network Technology Co., Ltd.

Customer experience

CapWords

All ratings610 ratings
Positive91.3%
Neutral3.9%
Negative4.8%
Written reviews215 reviews
Positive72.1%
Neutral14.4%
Negative13.5%

RepeatDuck

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

CapWords

Reported bugs

1 issue
  • Some website links not working properly

Requested features

5 requests
  • Add ability to import existing flashcards
  • Integrate with other language learning apps
  • Provide option to change native language
  • Add home screen widgets
  • Expand object description capabilities

RepeatDuck

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

CapWords

Subscriptions6
  • Premium-Monthly-b$4.991 Month
  • Premium-Monthly$5.991 Month
  • Premium-Yearly3 Days trial$19.991 Year
Show 3 more
  • Premium-Yearly3 Days trial2 variants$29.991 Year
  • Premium-Yearly-Promo1 Year trial$29.991 Year
  • Premium-Yearly-Promo-b1 Year trial$29.991 Year
3 purchases

RepeatDuck

Subscriptions2
  • Monthly Pro$1.991 Month
  • Yearly Pro$9.991 Year
One-time1
  • Lifetime Pro$19.99

Questions

Is CapWords free?
CapWords is free to download, with in-app purchases available.
Is RepeatDuck free?
RepeatDuck is free to download, with in-app purchases available.
Which has better reviews, CapWords or RepeatDuck?
RepeatDuck is rated higher. CapWords averages 4.7 out of 5 from 614 ratings, while RepeatDuck averages 5.0 from 1 ratings.
Do CapWords or RepeatDuck have ads?
Neither CapWords nor RepeatDuck shows ads.
Which is updated more often, CapWords or RepeatDuck?
CapWords ships an update every 5 days, and RepeatDuck every 2 months. Most recently, CapWords was updated on October 25, 2026 and RepeatDuck on October 21, 2026.

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