Comparison

RepeatDuck vs Full Stack Interview

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

Head to head
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

About

Full Stack Interview

Prepare for technical interviews with a comprehensive question bank covering front-end, back-end, and mobile development. Access core knowledge, answering strategies, and practical skills to boost your success rate in recruitment and job-hopping interviews.

Highlights
  • Multi-platform question bank (Java, iOS, Android, Vue, Flutter, mini programs)
  • Interview guide with core knowledge and skills
  • Classic questions from top companies
  • Offline access for practice
  • Suitable for front-end, back-end, and mobile developers
Features
Read full description

A full-stack interview prep tool built for programmers, covering front-end, back-end and mobile development to help you succeed in campus hiring, social recruitment and job-switch interviews. Core Features • AI Interview Question Bank: High-frequency real questions about AI, algorithms and large language models • Multi-platform Question Library: Exclusive interview questions for Java, iOS, Android, Vue, Flutter & Mini Programs • Professional Interview Guide: Common test points, standard answering frameworks and practical interview skills • Core Knowledge for Top Companies: Key knowledge frequently asked by major tech enterprises • Offline Review Mode: Cache all questions to practice without network anytime Whether you’re a new grad, career changer or experienced developer, you can fill knowledge gaps rapidly, raise your interview success rate and land high-paying offers effortlessly. Full Stack Interview QQ Group: 1030593558

Screenshots

RepeatDuck4 screens
Full Stack Interview4 screens

Verdict

The call

The clearest difference is price: RepeatDuck at Free against Full Stack Interview's $0.90. Full Stack Interview's advantage is iOS requirement (12.0 vs 15.0). On update cadence, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

RepeatDuck is free to download; Full Stack Interview costs $0.90 up front. RepeatDuck sells 3 in-app purchases, starting at $1.99 per month and Full Stack Interview sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

RepeatDuck ships an update every 2 months, Full Stack Interview every 6 weeks. The most recent releases landed on September 17, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
RepeatDuck versus Full Stack Interview: the parameters behind the verdict, then further details
ParameterRepeatDuckFull Stack Interview
PriceFree — better$0.90
Rating5.0 (1 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size147 MB68 MB
Age rating4+4+
DeveloperChaojifeng (Xiamen) Network Technology Co., Ltd.平 何

Customer experience

RepeatDuck

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

Full Stack Interview

Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

RepeatDuck

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

Full Stack Interview

One-time6
  • 1个月会员$0.29
  • 3个月会员$0.59
  • 6个月会员$0.89
Show 3 more
  • 1年会员$1.49
  • 5年会员$5.99
  • 永久会员$28.99

Questions

Is RepeatDuck free?
RepeatDuck is free to download, with in-app purchases available.
Is Full Stack Interview free?
Full Stack Interview costs $0.90, and also offers in-app purchases.
Do RepeatDuck or Full Stack Interview have ads?
Neither RepeatDuck nor Full Stack Interview shows ads.
Which is updated more often, RepeatDuck or Full Stack Interview?
RepeatDuck ships an update every 2 months, and Full Stack Interview every 6 weeks. Most recently, RepeatDuck was updated on September 17, 2026 and Full Stack Interview on October 8, 2026.

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