YYサイレンアラート vs Safe QR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
YYサイレンアラート
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.
- 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
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■「YYサイレンアラート」はこんな方にオススメです ・「サイレン音」が聞き取りづらい方 ・周囲の音の大きさが気になる方 ・周囲の音の情報を可視化したい方 ■検出できる音 ・表示と振動でお知らせする音 サイレン、救急車、消防車、パトカー、車のクラクション、自転車のベル、火災報知器、インターフォン ・表示のみでお知らせする音 話し声、歌声、音楽、悲鳴、叫び声、ガラスなどが割れる音、楽器（ギター、ドラム、ピアノ） ※本アプリは、端末のマイクを使って「サイレン音」などを判別します。 検出できない場合があったり、誤って検出する場合があります。 周囲の環境を目視確認するようにしてください。
Safe QR
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.
- Create WiFi QR Codes
- Scan WiFi QR Codes
- Generate Standard QR Codes
- Scan Standard QR Codes
- Save Scan History
- Review URLs Before Opening
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Safe QR is a QR code reader that lets you review the destination URL before opening it, so you can browse more safely. You can also easily generate QR codes from links or text. All features are completely free to use, with no registration or login required. ● Key Features - Create Wi-Fi QR codes - Share QR codes - QR code reader / QR code scanner - Save scan and creation history - Regenerate previously created QR codes - Review URLs before opening them for safer access ● Privacy All scan and creation history is stored only on your device and is never sent to our servers.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | YYサイレンアラート | Safe QR |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (2 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | — | 2 — better |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 6 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | 株式会社エクォス・リサーチ | Motoki Takahashi |
Customer experience
YYサイレンアラート
Safe QR
In-app purchases
YYサイレンアラート
No in-app purchases
Safe QR
No in-app purchases
