# 레서 vs 상식 한 줄

The clearest difference is rating: 상식 한 줄 at 5.0 against 레서's 2.5. 레서's advantage is in-app purchases (none vs 2) and review sentiment (95% vs 80%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. 상식 한 줄 sells 2 in-app purchases, starting at $1.99 per month. 레서 asks for nothing beyond the download.

상식 한 줄 holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews complicate that: 95% of 레서's written reviews are positive against 80% of 상식 한 줄's, so the app with the better star average is not the one people write more warmly about.

레서 ships an update every 8 days, 상식 한 줄 every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | 레서 | 상식 한 줄 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/ai/id1619729664/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6451434808/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | **95.2% of reviews** | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | **Free** | Freemium |
| Size | 251 MB | 57 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Artificial Society Inc.](https://appshunter.io/developer/1627456359) | [Sunghee Lee](https://appshunter.io/developer/1477689060) |

## What reviewers say

### 레서

[App page](https://appshunter.io/ios/app/ai/id1619729664)

This app helps students from elementary to high school improve their Korean language skills. It offers AI-powered personalized learning, a vast library of curriculum-based content, and tools for reading, writing, and comprehension. Features include daily learning, monthly reading comprehension tests, and AI-powered feedback for written assignments.

**Highlights:** AI personalized learning curriculum, 30,000+ curriculum-based content, Daily Korean language practice, Monthly reading comprehension tests, AI writing feedback and scoring, AI eye-tracking for reading habits

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

**In-app purchases:** none


### 상식 한 줄

[App page](https://appshunter.io/ios/app/id6451434808)

Access a daily line of general knowledge on your home screen without dedicated study time. Explore over 3,000 facts across 60 topics, test your knowledge with quizzes, and track your learning progress through levels and streaks. Save and search for facts to build a consistent learning habit.

**Highlights:** Daily knowledge facts via widgets, Over 3,000 facts across 60 topics, 4-choice quizzes for review, Leveling and streak tracking, Save and search for facts, Home and lock screen widgets

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1개월 Premium | $1.99 | per month |
| 1년 Premium | $14.99 | per year |


## Frequently asked questions

### Is 레서 free?

레서 is free to download, with no in-app purchases.

### Is 상식 한 줄 free?

상식 한 줄 is free to download, with in-app purchases available.

### Which has better reviews, 레서 or 상식 한 줄?

상식 한 줄 is rated higher. 레서 averages 2.5 out of 5 from 2 ratings, while 상식 한 줄 averages 5.0 from 1 ratings.

### Do 레서 or 상식 한 줄 have ads?

Neither 레서 nor 상식 한 줄 shows ads.

### Which is updated more often, 레서 or 상식 한 줄?

레서 ships an update every 8 days, and 상식 한 줄 every 2 weeks. Most recently, 레서 was updated on November 3, 2026 and 상식 한 줄 on November 3, 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.*