# Decibel Metre (Sound Meter) — Measure the environment noise > Mobile decibel meter app measures sound levels using the device microphone. (iPhone/iPad app by UniCom Technology.) - Source: https://appshunter.io/ios/app/decibel-metre-sound-meter/id1590659820 (this page in markdown: same URL + `.md`) - Developer: [UniCom Technology](https://appshunter.io/developer/1270764210) - Category: Utilities, Productivity - Price: Free - Rating: 4.50/5 from 577 App Store ratings · 123 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 6 MB - Languages: American English - Released: 2021-10-19 - Data updated: 2026-08-17 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/decibel-metre-sound-meter/id1590659820/reviews.md ## What is Decibel Metre (Sound Meter)? Want to measure sound level? This is smart sound level meter app for IOS! Our decibel meter uses your built-in microphone to measure sound volume in decibels (dBA) and also displays samples on graph. Features: - Indicates decibel by digital screen - Display the current noise reference - Display min/avg/max decibel values - Display decibel by graph line ## Key features - Measures sound level in decibels (dBA) - Uses built-in microphone - Displays readings on digital screen - Shows current noise reference - Tracks min/avg/max decibel values - Visualizes decibel data on a graph ## What do users think of Decibel Metre (Sound Meter)? Overall sentiment: neutral **Pros** - 👍 Simple and easy to use - 👍 Helpful tool for measuring sound levels - 👍 Straightforward and effective - 👍 Genuinely free and useful **Cons** - 🐛 Inaccurate readings - 🐛 Inconsistent measurements - 🐛 Reset button doesn't reset average value - 🐛 No calibration feature **Commonly reported bugs** - Microphone not registering any noise - Completely unresponsive app **Most requested features** - Quiet room label correction - Add fast and slow response time settings - Ability to export/save measurement logs and graphs ## Recent user reviews (10 of 123) All indexed reviews: https://appshunter.io/ios/app/decibel-metre-sound-meter/id1590659820/reviews.md ### 5/5 — 作者好。这是什么问题啊 *2026-04-21* 不太明白external meter和quiet room怎么用 我quiet room测量最高70 externalmeter就100db 我在安静房间测量 **Developer response:** 感谢你的反馈，也理解你的困惑。 “Quiet Room”和“External Meter”通常是不同的测量模式或校准方式，结果会因为参考基准不同而产生差异。在安静环境中，如果两种模式读数差距较大，可能与设备麦克风灵敏度、自动增益控制或校准参数有关。 建议你在同一环境下多次测试，并保持手机固定位置，以获得更稳定的对比结果。如果问题持续出现，请提供设备型号和应用版本，我们可以进一步帮你排查。 ### 5/5 — Recommended *2026-03-08, version 1.7* Great app great UX no nonsense ### 3/5 — Not sure I understand! *2026-03-04, version 1.7* Thanks for developing this app - I want to use it to try and understand the difference between appliances before I spend. But just having the app open logs in at 42dcb am I supposed to be able to set it somehow? Or is this the ambient noise level?! Feel I need a few basic instructions built in. Thanks. ### 1/5 — 異様に大きく出る *2026-03-02* 深夜、感覚的には無音状態なのに常時43dbってことはないでしょ？ 他のアプリより20db位大きく出る。信頼できない。 **Developer response:** ご意見ありがとうございます！ 静かな環境でも数値が出るのは、端末マイクの感度や周囲の微小なノイズ、キャリブレーション差による影響です。他のアプリとの差も同様の要因で発生することがあります。現在、精度と安定性の改善に取り組んでいます ### 1/5 — Inaccurate *2025-12-17, version 1.7* Completely inaccurate compared to genuine calibrated app like NIOSH ### 4/5 — Orientación de pantalla *2025-11-21, version 1.7* Deberían de habilitar la orientación invertida para agarrar el teléfono al revés, y así ver bien los datos mientras el micrófono apunta a la fuente. ### 1/5 — 結果が不正確でした *2025-11-19* 音がする場所と明らかにそこより静かな場所で対して結果が変わりませんでした。 **Developer response:** ご意見ありがとうございます。計測結果に違いが出ない件について、改善を検討いたします。 ### 1/5 — 精度悪過ぎ *2025-10-15* 手持ちの校正済みの騒音計より20dbも高く表示されて目安にもならない。 **Developer response:** ご意見ありがとうございます。測定結果の誤差を減らすため、今後のアップデートで精度の改善を行う予定です。 ### 5/5 — 目前用起来最好用的一款测音量软件 *2025-09-09* 用过几款，这一款是我觉得功能最全，最好用的。不知道啥时候会收费，希望可以便宜点。 **Developer response:** 非常感谢您的支持和喜爱！我们很高兴您觉得应用功能完善、使用方便。若将来推出付费版本，我们会尽力保持价格合理。 ### 5/5 — Simple et efficace *2025-08-31* Bravo **Developer response:** Merci pour votre commentaire ! Nous sommes ravis que l’application vous plaise. ## Frequently asked questions about Decibel Metre (Sound Meter) ### What does the Decibel Metre app do? This app functions as a smart sound level meter for iOS devices. It uses your device's built-in microphone to measure ambient sound volume in decibels (dBA) and displays this information on a digital screen. It also provides a graphical representation of sound samples over time. ### What are the key features of this sound meter app? Key features include indicating decibel levels on a digital screen, displaying the current noise reference, showing minimum, average, and maximum decibel values, and visualizing decibel levels on a graph line. It leverages your device's microphone for measurements. ### Is this app free to use? The application is free to download and use. However, it does display advertisements to support its development and operation. There are no in-app purchases mentioned for additional features or ad removal. ### What devices is this decibel meter compatible with? The app is designed for iOS devices. It utilizes the device's built-in microphone to perform sound level measurements. Specific iOS version compatibility is not detailed but it is an iOS application. ### How can I use this app to measure noise? Simply open the app and it will begin measuring the sound level around you using your device's microphone. You can observe the real-time decibel readings on the digital screen, see reference noise levels, and track min/avg/max values. The graph feature helps visualize sound fluctuations. ## Version history (last 5 releases) ### 1.7 — 2025-09-07 Fixed crash bug ### 1.6 — 2025-09-02 Fixed crash bugs ### 1.5 — 2025-02-20 Fixed crash bugs ### 1.4 — 2024-11-10 Fixed crash bugs ### 1.3 — 2022-05-20 Fixed crash bugs ## Apps similar to Decibel Metre (Sound Meter) | App | Rating | Price | Category | | --- | --- | --- | --- | | [Decibel X:dB Sound Level Meter](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923) | 4.6 (160,618) | Free | Utilities | | [Sound Meter (Decibel)](https://appshunter.io/ios/app/sound-meter-decibel/id1626613141) | 4.5 (3,079) | Free | Utilities | | [NIOSH Sound Level Meter](https://appshunter.io/ios/app/niosh-sound-level-meter/id1096545820) | 4.7 (16,565) | Free | Utilities | | [Decibel X PRO: dBA Noise Meter](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611) | 4.7 (6,888) | $69.99 | Utilities | | [Decibel : dB sound level meter](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795) | 4.6 (36,116) | Free | Utilities | | [Decibel Meter - Sound Level dB](https://appshunter.io/ios/app/decibel-meter-sound-level-db/id1624503658) | 4.7 (1,292) | Free | Utilities | ## More apps by UniCom Technology - [Calculator%.](https://appshunter.io/ios/app/calculator/id980603448) - [Stopwatch ٞ](https://appshunter.io/ios/app/stopwatch/id982137790) - [Counter+.](https://appshunter.io/ios/app/counter-plus/id986800297) - [Speedometer ⁺](https://appshunter.io/ios/app/speedometer/id993436042) - [Timer ٞ](https://appshunter.io/ios/app/timer/id1078562105) - [Speedmeter +](https://appshunter.io/ios/app/speedmeter-plus/id1078573932) All apps by UniCom Technology: https://appshunter.io/developer/1270764210 ## Related topics [sound meter environment](https://appshunter.io/ios/topics/sound-meter-environment) · [sound level environmental](https://appshunter.io/ios/topics/sound-level-environmental) · [sound meter volume](https://appshunter.io/ios/topics/sound-meter-volume) · [sound level pressure](https://appshunter.io/ios/topics/sound-level-pressure) · [silent library challenge](https://appshunter.io/ios/topics/silent-library-challenge) · [sound level meter pressure](https://appshunter.io/ios/topics/sound-level-meter-pressure) · [measure decibels sound](https://appshunter.io/ios/topics/measure-decibels-sound) · [medidor de ruido](https://appshunter.io/ios/topics/medidor-de-ruido) · [decibel x free](https://appshunter.io/ios/topics/decibel-x-free) · [free decibel app](https://appshunter.io/ios/topics/free-decibel-app) · [sound measure level](https://appshunter.io/ios/topics/sound-measure-level) · [decimal x](https://appshunter.io/ios/topics/decimal-x) · [measure noise level](https://appshunter.io/ios/topics/measure-noise-level) · [sound level app](https://appshunter.io/ios/topics/sound-level-app) · [sound measure power](https://appshunter.io/ios/topics/sound-measure-power) · [decibel bass](https://appshunter.io/ios/topics/decibel-bass) · [sound level](https://appshunter.io/ios/topics/sound-level) · [sound meter pressure](https://appshunter.io/ios/topics/sound-meter-pressure) · [decibel x](https://appshunter.io/ios/topics/decibel-x) · [borla](https://appshunter.io/ios/topics/borla) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*