# YYサイレンアラート vs Memo with camera

The clearest difference is ads: YYサイレンアラート at none against Memo with camera's shown. Memo with camera's advantage is update cadence (every 2 weeks vs monthly). On price, in-app purchases, device support and iOS requirement 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, Memo with camera every 2 weeks. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | YYサイレンアラート | Memo with camera |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 35 MB |
| Requires iOS | **15.0** | 15.8.3 |
| 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) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## 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


### Memo with camera

[App page](https://appshunter.io/ios/app/memo-with-camera/id6502794309)

**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 Memo with camera free?

Memo with camera is free to download, with no in-app purchases.

### Do YYサイレンアラート or Memo with camera have ads?

Memo with camera 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 Memo with camera?

YYサイレンアラート ships an update monthly, and Memo with camera every 2 weeks. Most recently, YYサイレンアラート was updated on October 10, 2026 and Memo with camera on October 7, 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.*