# 参考書de英語脳 vs CaptionTube

The clearest difference is in-app purchases: CaptionTube at none against 参考書de英語脳's 4. CaptionTube also leads on update cadence (every 8 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 参考書de英語脳 sells 4 one-off in-app purchases. CaptionTube asks for nothing beyond the download.

参考書de英語脳 ships an update every 3 weeks, CaptionTube every 8 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 参考書de英語脳 | CaptionTube |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 27 MB | 39 MB |
| Requires iOS | 13.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Seiji Mukai](https://appshunter.io/developer/1228461062) | [Hironobu Saito](https://appshunter.io/developer/1557456154) |

## What reviewers say

### 参考書de英語脳

[App page](https://appshunter.io/ios/app/de/id1228461063)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30日間利用権 | $0.99 | one-time |
| 90日間利用権 | $2.99 | one-time |
| 180日間利用権 | $5.99 | one-time |
| 365日間利用権 | $11.99 | one-time |


### CaptionTube

[App page](https://appshunter.io/ios/app/captiontube/id6754217528)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 参考書de英語脳 free?

参考書de英語脳 is free to download, with in-app purchases available.

### Is CaptionTube free?

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

### Do 参考書de英語脳 or CaptionTube have ads?

Neither 参考書de英語脳 nor CaptionTube shows ads.

### Which is updated more often, 参考書de英語脳 or CaptionTube?

参考書de英語脳 ships an update every 3 weeks, and CaptionTube every 8 days. Most recently, 参考書de英語脳 was updated on October 2, 2026 and CaptionTube on October 9, 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.*