# 骨マス vs ホシタン

The clearest difference is in-app purchases: ホシタン at none against 骨マス's 4. ホシタン also leads on iOS requirement (18.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 骨マス sells 4 in-app purchases, starting at $5.99 per month. ホシタン asks for nothing beyond the download.

骨マス ships an update every 2 weeks, ホシタン fortnightly. The most recent releases landed on November 5, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | 骨マス | ホシタン |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 109 MB | 209 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [waraku kobayashi](https://appshunter.io/developer/1892218372) | [ryosukE soejimA](https://appshunter.io/developer/1584980968) |

## What reviewers say

### 骨マス

[App page](https://appshunter.io/ios/app/id6774444581)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MODE:Competition | $5.99 | per month |
| 骨学:Bundle | $11.99 | per month |
| 骨学:英語 | $22.99 | one-time |
| 骨学:ラテン語 | $22.99 | one-time |


### ホシタン

[App page](https://appshunter.io/ios/app/toeic/id6796210199)

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

**In-app purchases:** none


## Frequently asked questions

### Is 骨マス free?

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

### Is ホシタン free?

ホシタン is free to download, with no in-app purchases.

### Do 骨マス or ホシタン have ads?

Both 骨マス and ホシタン show ads.

### Which is updated more often, 骨マス or ホシタン?

骨マス ships an update every 2 weeks, and ホシタン fortnightly. Most recently, 骨マス was updated on November 5, 2026 and ホシタン on November 8, 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.*