# 비수다 vs Start Math

The clearest difference is in-app purchases: 비수다 at none against Start Math's 5. 비수다 also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Start Math sells 5 one-off in-app purchases. 비수다 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on September 10, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 비수다 | Start Math |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 34 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Seungwoo Lee](https://appshunter.io/developer/1858119568) | [CHUNGKIL KIM](https://appshunter.io/developer/960187999) |

## What reviewers say

### 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


### Start Math

[App page](https://appshunter.io/ios/app/start-math/id6799822841)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Middle School Math Year 3 | $4.99 | one-time |
| Middle School Math Year 1 | $4.99 | one-time |
| Middle School Math Year 2 | $4.99 | one-time |
| Common Math 1 | $5.99 | one-time |
| Common Math 2 | $5.99 | one-time |


## Frequently asked questions

### Is 비수다 free?

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

### Is Start Math free?

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

### Do 비수다 or Start Math have ads?

Neither 비수다 nor Start Math shows ads.

### Which is updated more often, 비수다 or Start Math?

비수다 ships an update every 2 days, and Start Math every 2 days. Most recently, 비수다 was updated on September 10, 2026 and Start Math on September 28, 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.*