# YYサイレンアラート vs nezu 3

The clearest difference is update cadence: YYサイレンアラート at monthly against nezu 3's every 7 months. nezu 3's advantage is iOS requirement (12.0 vs 15.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

YYサイレンアラート ships an update monthly, nezu 3 every 7 months. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | YYサイレンアラート | nezu 3 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Free | Free |
| Size | 6 MB | 25 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [株式会社エクォス・リサーチ](https://appshunter.io/developer/1483010608) | [SOLID SONIC K.K.](https://appshunter.io/developer/1767770689) |

## 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


### nezu 3

[App page](https://appshunter.io/ios/app/nezu-3/id6673896884)

Control your Vibone nezu 3 device via Bluetooth to switch between hearing and audio modes. Adjust volume, noise reduction, and customize sound profiles with six frequency bands for a personalized listening experience.

**Highlights:** Bluetooth device connection, Switch hearing/Bluetooth modes, Adjust left/right earphone volume, Adjust noise reduction, Customize sound profiles, Six-band frequency adjustment

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

**In-app purchases:** none


## 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 nezu 3 free?

nezu 3 is free to download, with no in-app purchases.

### Do YYサイレンアラート or nezu 3 have ads?

Neither YYサイレンアラート nor nezu 3 shows ads.

### Which is updated more often, YYサイレンアラート or nezu 3?

YYサイレンアラート ships an update monthly, and nezu 3 every 7 months. Most recently, YYサイレンアラート was updated on October 10, 2026 and nezu 3 on October 4, 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.*