# 성인의 수학 vs Starlyra

The clearest difference is in-app purchases: Starlyra at none against 성인의 수학's 2. Starlyra also leads on update cadence (daily vs weekly). 성인의 수학's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. 성인의 수학 sells 2 one-off in-app purchases. Starlyra asks for nothing beyond the download.

성인의 수학 ships an update weekly, Starlyra daily. Both last shipped on October 31, 2026.

## The numbers

| Metric | 성인의 수학 | Starlyra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Daily** |
| Size | 48 MB | 286 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Mijin Kim](https://appshunter.io/developer/1717382242) | [Eurekable Co.,Ltd.](https://appshunter.io/developer/1810213658) |

## What reviewers say

### 성인의 수학

[App page](https://appshunter.io/ios/app/id6782822659)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 힌트쿠폰 10개 | $1.99 | one-time |
| 광고 제거 | $3.99 | one-time |


### Starlyra

[App page](https://appshunter.io/ios/app/starlyra-star-map/id6814084560)

**In-app purchases:** none


## Frequently asked questions

### Is 성인의 수학 free?

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

### Is Starlyra free?

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

### Do 성인의 수학 or Starlyra have ads?

Both 성인의 수학 and Starlyra show ads.

### Which is updated more often, 성인의 수학 or Starlyra?

성인의 수학 ships an update weekly, and Starlyra daily. Most recently, 성인의 수학 was updated on October 31, 2026 and Starlyra 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.*