# 연애의 과학 vs 크랙

The clearest difference is rating: 크랙 at 2.9 against 연애의 과학's 2.1. 크랙 also leads on update cadence (weekly vs every 5 weeks) and review sentiment (38% vs 23%). 연애의 과학's advantage is iOS requirement (13.4 vs 15.1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. 연애의 과학 sells 6 one-off in-app purchases and 크랙 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

크랙 holds the better App Store score, 2.9 against 2.1. Both are backed by a comparable volume of ratings — 54 and 24 respectively. Written reviews point the same way: 23% of 연애의 과학's written reviews are positive against 38% of 크랙's.

연애의 과학 ships an update every 5 weeks, 크랙 weekly. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 연애의 과학 | 크랙 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (54 ratings)](https://appshunter.io/ios/app/id1108026487/reviews) | **[2.9 (24 ratings)](https://appshunter.io/ios/app/ai/id6740223370/reviews)** |
| Number of ratings | **54** | 24 |
| Positive reviews | 23.1% of reviews | **38.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 36 MB | 231 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Scatter Lab, Inc.](https://appshunter.io/developer/599214190) | [wrtn technologies Inc.](https://appshunter.io/developer/1684966734) |

## What reviewers say

### 연애의 과학

[App page](https://appshunter.io/ios/app/id1108026487)

This app offers science-based dating advice and psychological tests. Analyze KakaoTalk conversations to understand relationship dynamics and discover your partner's true feelings. It provides expert insights beyond horoscopes and fortune-telling.

**Highlights:** Psychology-based dating tips, KakaoTalk conversation analysis, Scientific psychological tests, Relationship insight tools, Expert dating advice

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 코인 20개 | $1.99 | one-time |
| 코인 50개 | $4.99 | one-time |
| 코인 100개 + 보너스 10개 | $9.99 | one-time |
| 코인 300개 + 보너스 60개 | $29.99 | one-time |
| 코인 500개 + 보너스 200개 | $49.99 | one-time |
| 코인 1000개 + 보너스 500개 | $99.99 | one-time |

**What reviewers like**

- 💕 Useful information and relatable content
- 🎉 Enjoyable and entertaining app
- 🧠 Provides insightful psychological analysis

**What reviewers complain about**

- 🤑 Expensive paid features
- 🔒 Concerns about data privacy and usage
- 🐛 Technical issues like crashes and login problems

**Reported bugs**

- Sudden app crashes
- Login and authentication problems
- Paid features not working as expected

**Requested features**

- Add support for more chat platforms (e.g. WhatsApp, Viber)
- Improve free coin earning system
- Provide more free content options


### 크랙

[App page](https://appshunter.io/ios/app/ai/id6740223370)

Create worlds, characters, and stories with AI in this interactive chat entertainment app. Your choices shape the narrative, offering a unique way to experience diverse genres and build deep connections with AI characters. Unleash your imagination and become a storyteller.

**Highlights:** AI-generated worlds, characters, and stories, Interactive chat-based narrative, Multiple genres including romance, fantasy, and sci-fi, Create and customize AI characters, AI remembers conversations and builds relationships, Unlimited free chat with AI characters, User-generated content creation opportunities

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 크래커 12000+1000개 | $7.99 | one-time |


## Frequently asked questions

### Is 연애의 과학 free?

연애의 과학 is free to download, with in-app purchases available.

### Is 크랙 free?

크랙 is free to download, with in-app purchases available.

### Which has better reviews, 연애의 과학 or 크랙?

크랙 is rated higher. 연애의 과학 averages 2.1 out of 5 from 54 ratings, while 크랙 averages 2.9 from 24 ratings.

### Do 연애의 과학 or 크랙 have ads?

Neither 연애의 과학 nor 크랙 shows ads.

### Which is updated more often, 연애의 과학 or 크랙?

연애의 과학 ships an update every 5 weeks, and 크랙 weekly. Most recently, 연애의 과학 was updated on October 18, 2026 and 크랙 on October 19, 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.*