# Killer Math vs 비수다

The clearest difference is ads: 비수다 at none against Killer Math's shown. On price, update cadence, 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.

Killer Math ships an update every 4 days, 비수다 every 2 days. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Killer Math | 비수다 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 53 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHUL HYUN LEE](https://appshunter.io/developer/297999549) | [Seungwoo Lee](https://appshunter.io/developer/1858119568) |

## What reviewers say

### Killer Math

[App page](https://appshunter.io/ios/app/killer-math/id6785559161)

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

**In-app purchases:** none


### 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 Killer Math free?

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

### Is 비수다 free?

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

### Do Killer Math or 비수다 have ads?

Killer Math shows ads; 비수다 does not.

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

Killer Math ships an update every 4 days, and 비수다 every 2 days. Most recently, Killer Math was updated on October 1, 2026 and 비수다 on September 29, 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.*