# YYサイレンアラート vs MIRAIRO Door

YYサイレンアラート and MIRAIRO Door are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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, MIRAIRO Door every 4 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | YYサイレンアラート | MIRAIRO Door |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 2 MB |
| Requires iOS | 15.0 | 15.0 |
| 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) | [Haudi, Inc.](https://appshunter.io/developer/1694190484) |

## 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


### MIRAIRO Door

[App page](https://appshunter.io/ios/app/mirairo-door/id6738896340)

**Features:** macOS Compatibility

**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 MIRAIRO Door free?

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

### Do YYサイレンアラート or MIRAIRO Door have ads?

Neither YYサイレンアラート nor MIRAIRO Door shows ads.

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

YYサイレンアラート ships an update monthly, and MIRAIRO Door every 4 weeks. Most recently, YYサイレンアラート was updated on November 3, 2026 and MIRAIRO Door on November 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.*