# 강의하는아이들 vs Buff

The clearest difference is review sentiment: Buff at 42% against 강의하는아이들's 24%. Buff also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.1 vs 15.0). 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.

강의하는아이들 ships an update every 2 months, Buff every 3 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 강의하는아이들 | Buff |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (5 ratings)](https://appshunter.io/ios/app/buff-word-power/id6739328232/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 24.0% of reviews | **41.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 14 MB | 228 MB |
| Requires iOS | 15.0 | **13.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Otwoline](https://appshunter.io/developer/422568234) | [CREVERSE, Inc.](https://appshunter.io/developer/739652504) |

## What reviewers say

### 강의하는아이들

[App page](https://appshunter.io/ios/app/id852898959)

**Features:** Vision Pro support

**In-app purchases:** none


### Buff

[App page](https://appshunter.io/ios/app/buff-word-power/id6739328232)

This app helps students from specific language academies reinforce vocabulary learned through i-Learning/p-Learning and prepare for word tests. Users can review learned words, track their progress, and level up their 'word power' as they memorize more terms.

**Highlights:** Vocabulary training for tests, Review learned words, Track memorization progress, Level up word power, Character customization, Tablet and phone compatible

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

**In-app purchases:** none


## Frequently asked questions

### Is 강의하는아이들 free?

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

### Is Buff free?

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

### Do 강의하는아이들 or Buff have ads?

Neither 강의하는아이들 nor Buff shows ads.

### Which is updated more often, 강의하는아이들 or Buff?

강의하는아이들 ships an update every 2 months, and Buff every 3 weeks. Most recently, 강의하는아이들 was updated on October 29, 2026 and Buff 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.*