# YYサイレンアラート vs こえもじ

The clearest difference is in-app purchases: YYサイレンアラート at none against こえもじ's 1. YYサイレンアラート also leads on ads (none vs shown). こえもじ's advantage is update cadence (every 8 days vs monthly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. こえもじ sells 1 one-off in-app purchase. YYサイレンアラート asks for nothing beyond the download.

YYサイレンアラート ships an update monthly, こえもじ every 8 days. The most recent releases landed on October 10, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | YYサイレンアラート | こえもじ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | Free | — |
| Size | 6 MB | 9 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [株式会社エクォス・リサーチ](https://appshunter.io/developer/1483010608) | [Keisuke Nakashima](https://appshunter.io/developer/1691259083) |

## What reviewers say

### YYサイレンアラート

[App page](https://appshunter.io/ios/app/yy/id6450823634)

This utility app visualizes important sounds like sirens and alarms, alerting users through visual cues and vibrations. It helps individuals who have difficulty hearing these sounds or want to be more aware of their auditory environment. The app detects various sounds, from emergency vehicles to everyday noises.

**Highlights:** Visualizes siren sounds, Alerts via display and vibration, Detects emergency vehicle sounds, Recognizes car horns and bicycle bells, Identifies fire alarms and intercoms, Visualizes speech, music, and breaking glass sounds

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

**In-app purchases:** none


### こえもじ

[App page](https://appshunter.io/ios/app/id6746428538)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示プラン | $1.99 | one-time |


## Frequently asked questions

### Is YYサイレンアラート free?

YYサイレンアラート is free to download, with no in-app purchases.

### Is こえもじ free?

こえもじ is free to download, with in-app purchases available.

### Do YYサイレンアラート or こえもじ have ads?

こえもじ shows ads; YYサイレンアラート does not.

### Which is updated more often, YYサイレンアラート or こえもじ?

YYサイレンアラート ships an update monthly, and こえもじ every 8 days. Most recently, YYサイレンアラート was updated on October 10, 2026 and こえもじ on October 18, 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.*