# スマホで赤シート vs 可視音

The clearest difference is in-app purchases: スマホで赤シート at none against 可視音's 3. スマホで赤シート also leads on update cadence (daily vs every 8 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 可視音 sells 3 one-off in-app purchases. スマホで赤シート asks for nothing beyond the download.

スマホで赤シート ships an update daily, 可視音 every 8 days. The most recent releases landed on October 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | スマホで赤シート | 可視音 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 8 days |
| Size | 3 MB | 2 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Keisuke Shibata](https://appshunter.io/developer/1791551970) | [Satoshi Yamada](https://appshunter.io/developer/1570646947) |

## What reviewers say

### スマホで赤シート

[App page](https://appshunter.io/ios/app/id6468587251)

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

**In-app purchases:** none


### 可視音

[App page](https://appshunter.io/ios/app/id6759029009)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support ¥100 | $0.49 | one-time |
| Support ¥500 | $2.99 | one-time |
| Support ¥1,000 | $5.99 | one-time |


## Frequently asked questions

### Is スマホで赤シート free?

スマホで赤シート is free to download, with no in-app purchases.

### Is 可視音 free?

可視音 is free to download, with in-app purchases available.

### Do スマホで赤シート or 可視音 have ads?

Neither スマホで赤シート nor 可視音 shows ads.

### Which is updated more often, スマホで赤シート or 可視音?

スマホで赤シート ships an update daily, and 可視音 every 8 days. Most recently, スマホで赤シート was updated on October 14, 2026 and 可視音 on September 21, 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.*