# Virtual Lock vs YYサイレンアラート

The clearest difference is update cadence: YYサイレンアラート at monthly against Virtual Lock's every 4 months. Virtual Lock's advantage is iOS requirement (11.0 vs 15.0). On price, ads, 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.

Virtual Lock ships an update every 4 months, YYサイレンアラート monthly. The most recent releases landed on May 17, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Virtual Lock | YYサイレンアラート |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | — | Free |
| Size | 13 MB | 6 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [IDOM Inc.](https://appshunter.io/developer/794295531) | [株式会社エクォス・リサーチ](https://appshunter.io/developer/1483010608) |

## What reviewers say

### Virtual Lock

[App page](https://appshunter.io/ios/app/virtual-lock/id1507126033)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Virtual Lock free?

Virtual Lock is free to download, with no in-app purchases.

### 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.

### Do Virtual Lock or YYサイレンアラート have ads?

Neither Virtual Lock nor YYサイレンアラート shows ads.

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

Virtual Lock ships an update every 4 months, and YYサイレンアラート monthly. Most recently, Virtual Lock was updated on May 17, 2026 and YYサイレンアラート on August 16, 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.*