# RepeatDuck vs Full Stack Interview

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.

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.

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.

## The numbers

| Metric | RepeatDuck | Full Stack Interview |
| --- | --- | --- |
| Price | **Free** | $0.90 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/repeatduck-chinese-master/id6740007643/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 147 MB | 68 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chaojifeng (Xiamen) Network Technology Co., Ltd.](https://appshunter.io/developer/1779974143) | [平 何](https://appshunter.io/developer/1630512266) |

## What reviewers say

### RepeatDuck

[App page](https://appshunter.io/ios/app/repeatduck-chinese-master/id6740007643)

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:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $1.99 | per month |
| Yearly Pro | $9.99 | per year |
| Lifetime Pro | $19.99 | one-time |


### Full Stack Interview

[App page](https://appshunter.io/ios/app/full-stack-interview/id6761838506)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1个月会员 | $0.29 | one-time |
| 3个月会员 | $0.59 | one-time |
| 6个月会员 | $0.89 | one-time |
| 1年会员 | $1.49 | one-time |
| 5年会员 | $5.99 | one-time |
| 永久会员 | $28.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*