# YYサイレンアラート vs Safe QR

The clearest difference is ads: YYサイレンアラート at none against Safe QR's shown. YYサイレンアラート also leads on monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support 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, Safe QR every 3 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | YYサイレンアラート | Safe QR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/safe-qr-read-qr-code-reader/id6473675636/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 6 MB | 30 MB |
| Requires iOS | **15.0** | 15.5 |
| 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) | [Motoki Takahashi](https://appshunter.io/developer/1555920724) |

## 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


### Safe QR

[App page](https://appshunter.io/ios/app/safe-qr-read-qr-code-reader/id6473675636)

Easily create, share, and scan WiFi QR codes to instantly connect to networks. It also supports standard QR codes for URLs, text, and contacts, with a focus on user privacy and security by allowing URL review before opening.

**Highlights:** Create WiFi QR Codes, Scan WiFi QR Codes, Generate Standard QR Codes, Scan Standard QR Codes, Save Scan History, Review URLs Before Opening

**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 Safe QR free?

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

### Do YYサイレンアラート or Safe QR have ads?

Safe QR 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 Safe QR?

YYサイレンアラート ships an update monthly, and Safe QR every 3 weeks. Most recently, YYサイレンアラート was updated on October 27, 2026 and Safe QR on October 24, 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.*