# 時間割看板2 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 時間割看板2's every 14 months. 時間割看板2's advantage is iOS requirement (10.0 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.

時間割看板2 ships an update every 14 months, YYサイレンアラート monthly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 時間割看板2 | 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 14 months | **Monthly** |
| Monetization | — | Free |
| Size | 23 MB | 6 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [I-O DATA, INC.](https://appshunter.io/developer/402444032) | [株式会社エクォス・リサーチ](https://appshunter.io/developer/1483010608) |

## What reviewers say

### 時間割看板2

[App page](https://appshunter.io/ios/app/2/id1320696276)

**Features:** Vision Pro support

**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 時間割看板2 free?

時間割看板2 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 時間割看板2 or YYサイレンアラート have ads?

Neither 時間割看板2 nor YYサイレンアラート shows ads.

### Which is updated more often, 時間割看板2 or YYサイレンアラート?

時間割看板2 ships an update every 14 months, and YYサイレンアラート monthly. Most recently, 時間割看板2 was updated on October 24, 2026 and YYサイレンアラート on October 27, 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.*