# KaNKaN vs YYサイレンアラート

The clearest difference is price: YYサイレンアラート at Free against KaNKaN's $2.99. YYサイレンアラート also leads on update cadence (monthly vs every 101 months). KaNKaN's advantage is review sentiment (86% vs 50%) and iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

YYサイレンアラート is free to download; KaNKaN costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

KaNKaN ships an update every 101 months, YYサイレンアラート monthly. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | KaNKaN | YYサイレンアラート |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | **85.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 101 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 29 MB | 6 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kaji Takatsugu](https://appshunter.io/developer/465688467) | [株式会社エクォス・リサーチ](https://appshunter.io/developer/1483010608) |

## What reviewers say

### KaNKaN

[App page](https://appshunter.io/ios/app/kankan/id1084225678)

This app simulates Japanese fire truck sirens and flashing lights. It allows users to record and play back custom sounds, featuring different siren patterns and bell sounds. Note that it does not function as a real siren amplifier and legal use of siren sounds should be confirmed.

**Highlights:** Simulated fire truck sirens, Flashing light patterns, Custom sound recording, Preset siren and bell sounds, Left/right turn sound effects, Adjustable siren volume

**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 KaNKaN free?

KaNKaN costs $2.99, 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 KaNKaN or YYサイレンアラート have ads?

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

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

KaNKaN ships an update every 101 months, and YYサイレンアラート monthly. Most recently, KaNKaN was updated on October 17, 2026 and YYサイレンアラート on October 10, 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.*