# 레서 vs 리드키(ReadKey)

The clearest difference is update cadence: 레서 at every 8 days against 리드키(ReadKey)'s every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

레서 ships an update every 8 days, 리드키(ReadKey) every 6 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 레서 | 리드키(ReadKey) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/ai/id1619729664/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 95.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 6 months |
| Monetization | Free | — |
| Size | 251 MB | 61 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Artificial Society Inc.](https://appshunter.io/developer/1627456359) | [Goodwillhunting, Inc](https://appshunter.io/developer/1061875607) |

## 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


### 리드키(ReadKey)

[App page](https://appshunter.io/ios/app/readkey/id6748025836)

**In-app purchases:** none


## Frequently asked questions

### Is 레서 free?

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

### Is 리드키(ReadKey) free?

리드키(ReadKey) is free to download, with no in-app purchases.

### Do 레서 or 리드키(ReadKey) have ads?

Neither 레서 nor 리드키(ReadKey) shows ads.

### Which is updated more often, 레서 or 리드키(ReadKey)?

레서 ships an update every 8 days, and 리드키(ReadKey) every 6 months. Most recently, 레서 was updated on November 3, 2026 and 리드키(ReadKey) on October 30, 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.*