# ReadingGym vs 비수다

The clearest difference is in-app purchases: 비수다 at none against ReadingGym's 1. 비수다 also leads on update cadence (every 2 days vs every 2 months) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ReadingGym sells 1 one-off in-app purchase. 비수다 asks for nothing beyond the download.

ReadingGym ships an update every 2 months, 비수다 every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | ReadingGym | 비수다 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 53 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Byoungho Kim](https://appshunter.io/developer/1888452963) | [Seungwoo Lee](https://appshunter.io/developer/1858119568) |

## What reviewers say

### ReadingGym

[App page](https://appshunter.io/ios/app/readinggym-speed-and-comprehend/id6767885092)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadingGym PRO | $2.99 | one-time |


### 비수다

[App page](https://appshunter.io/ios/app/3/id6795456254)

This app provides extensive practice for Korean college entrance exam reading comprehension passages. It offers a structured three-read approach, daily curated texts, and spaced repetition for reviewing incorrect answers. AI-powered explanations help users understand complex reasoning.

**Highlights:** Extensive practice with 185 passages and 2,041 questions, Structured three-read training method, Daily curated passages based on target exam date, Spaced repetition for reviewing incorrect answers, AI-powered explanations for difficult questions, Learning reminders to maintain study flow

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

**In-app purchases:** none


## Frequently asked questions

### Is ReadingGym free?

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

### Is 비수다 free?

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

### Do ReadingGym or 비수다 have ads?

Neither ReadingGym nor 비수다 shows ads.

### Which is updated more often, ReadingGym or 비수다?

ReadingGym ships an update every 2 months, and 비수다 every 2 days. Most recently, ReadingGym was updated on October 31, 2026 and 비수다 on October 31, 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.*