# Decibel Meter Plus — Noise Level & Sound Meter > Measures sound levels, provides hearing loss information and exposure guidelines. (iPhone/iPad app by 华芳 张.) - Source: https://appshunter.io/ios/app/decibel-meter-plus/id648142711 (this page in markdown: same URL + `.md`) - Developer: [华芳 张](https://appshunter.io/developer/586041482) - Category: Utilities - Price: $0.99 (on sale, was $2.99) - Rating: 3.00/5 from 125 App Store ratings · 126 written reviews indexed - Age rating: 4+ - Requires: iOS 15.8 · 14 MB - Languages: Russian, Bangla, Bulgarian, Hindi, Persian, Serbian, Slovenian, Swahili, Urdu, Vietnamese and 33 more - Released: 2013-05-17 - Data updated: 2026-09-07 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/decibel-meter-plus/id648142711/reviews.md ## What is Decibel Meter Plus? Decibel Meter helps you quickly check the sound level around you using your device’s built-in microphone. Open the app and instantly see the current sound level in decibels. You can use it to get a general idea of everyday noise levels at home, in the office, in classrooms, outdoors, or in other environments. Key Features: • Real-time sound level measurement • Clear decibel display • Average, peak, and maximum values • Simple visual meter and history graph • Calibration adjustment for different devices and environments • Easy-to-use interface for quick checks • Support for iPhone and iPad • Multiple language support • In-app Support for feedback and questions Please note: Decibel readings may vary depending on your device microphone, case, distance from the sound source, background noise, and calibration settings. This app is designed for general reference and everyday use. It is not a replacement for a certified professional sound level meter. Download Decibel Meter and check the sound around you with ease. ## Key features - Measure sound levels - Display average, peak, and max values - Plotted history of average values - Information on NIHL - Decibel exposure time guidelines - Calibrate measurements - Record and export data ## Chart rankings - #183 in Top Paid · Utilities (US App Store) ## What do users think of Decibel Meter Plus? Overall sentiment: negative **Pros** - 👍 Easy to use and simple interface - 📊 Clear visual display with color-coded sound levels - 🎯 Useful for comparative measurements - 📈 Includes graphical strip chart functionality - ⚡ Responsive and quick performance - 🆓 Free version available **Cons** - ❌ Severely inaccurate decibel readings - 📍 Consistently reads 10-50 dB higher than actual levels - 🔧 No calibration function available - 🐛 Doesn't return to 0 dB in silent conditions - 📱 Requires app updates and iOS compatibility fixes - 🎚️ Maxes out at 110 dB limit - ⚠️ Overly sensitive to microphone input - 🔄 Inconsistent and fluctuating readings **Commonly reported bugs** - App requires developer updates and iOS compatibility fixes - Baseline reading of 50-80 dB even in complete silence - Readings spike dramatically with minimal sound input - Graph display lacks user control - Inconsistent measurements in same environment - Microphone sensitivity cannot be adjusted - App crashes or fails to function on some devices **Most requested features** - Calibration function to adjust readings - Higher maximum dB limit (120+ dB) for loud events - Ability to attach photos with meter readings - Better baseline reset to 0 dB in silence - dB(A) weighting filter option - Improved control over graphical display ## Recent user reviews (10 of 126) All indexed reviews: https://appshunter.io/ios/app/decibel-meter-plus/id648142711/reviews.md ### 1/5 — Needs an update *2018-07-10, version 1.6* I purchased this app and now it won’t work because the developer needs to update the software. Not cool! Do not purchase. ### 1/5 — Ios11 *2018-01-20* Ne functionne pas sous ios 11 **Developer response:** Bonjour, merci beaucoup d’utiliser mon application et d’avoir partagé votre avis. Je vous suis vraiment reconnaissant pour votre soutien. Je développe mes applications de manière indépendante, donc chaque avis et chaque retour des utilisateurs sont très encourageants pour moi. En guise de petit remerciement, j’aimerais vous offrir deux codes promo que vous pouvez utiliser pour mes autres applications. Decibel Meter Plus Pro(https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) L’application est actuellement disponible en téléchargement gratuit cette semaine. Vous pouvez utiliser le code suivant pour essayer les fonctionnalités premium : Code promo : RREXW64L44W6FFEY47 (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=RREXW64L44W6FFEY47) Fisheye Plus(https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) Fisheye Plus est également disponible en téléchargement gratuit cette semaine. Voici aussi un code promo pour essayer ses fonctionnalités premium : Code promo : NPYTM7JA783XHRT6HL (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=NPYTM7JA783XHRT6HL) Merci encore pour votre gentillesse et votre soutien. Je l’apprécie sincèrement, et j’espère que ces applications vous seront utiles et agréables à utiliser. ### 1/5 — Не работает в iOS11 *2017-11-14* Не работает в iOS11 ### 1/5 — 太假 *2017-10-02* 在农村，夜里十点半什么声音都没有，测下来居然有60分贝左右，直接无语。 **Developer response:** 您好，非常感谢您使用我的 App，并分享您的评价。真的很感谢您的支持！ 我是独立开发者，所以用户的每一条评价和反馈对我来说都非常鼓励。作为一点小小的感谢，我想分享两个优惠码，您可以用于我的另外两款 App。 Decibel Meter Plus Pro(https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) 这款 App 本周可以免费下载。您可以使用下面的优惠码来体验高级功能： 优惠码：MPA7P7Y8TXYMEFN3N6 (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=MPA7P7Y8TXYMEFN3N6) Fisheye Plus(https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) Fisheye Plus 本周也可以免费下载。下面这个优惠码也可以用来体验它的高级功能： 优惠码：E7R66RJTW7WAY6ALW6 (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=E7R66RJTW7WAY6ALW6) 再次感谢您的友善和支持。我真的非常感激，也希望这些 App 对您有帮助，并能带给您愉快的使用体验。 ### 2/5 — OK but not great *2017-09-11* The major problem, in my experience, is I never got a reading over 99 db. I am mechanical engineer and I have experience in environmental engineering; when you are at 99 and the sound gets louder, you expect the reading to increase. **Developer response:** Hi, thank you very much for using my app and sharing your review. I’m really grateful for your support. I develop my apps independently, so every review and piece of feedback is very encouraging to me. As a small token of thanks, I’d like to share two promo codes that you can use for my other apps. Decibel Meter Plus Pro(https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) It’s currently free to download this week. You can use the following code to try the premium features: Promo Code: 38PWP84AATT7M6RY6H (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=38PWP84AATT7M6RY6H) Fisheye Plus(https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) Fisheye Plus is also free to download this week. Here is a promo code for trying its premium features as well: Promo Code: 7XXKN4YRKNXLJEPPK3 (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=7XXKN4YRKNXLJEPPK3) Thank you again for your kindness and support. I truly appreciate it, and I hope these apps are useful and enjoyable for you too. ### 4/5 — Très bonne application, simple, précise et fiable *2017-08-28* Très bonne application, simple, précise et fiable **Developer response:** Bonjour, merci beaucoup d’utiliser mon application et d’avoir partagé votre avis. Je vous suis vraiment reconnaissant pour votre soutien. Je développe mes applications de manière indépendante, donc chaque avis et chaque retour des utilisateurs sont très encourageants pour moi. En guise de petit remerciement, j’aimerais vous offrir deux codes promo que vous pouvez utiliser pour mes autres applications. Decibel Meter Plus Pro(https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) L’application est actuellement disponible en téléchargement gratuit cette semaine. Vous pouvez utiliser le code suivant pour essayer les fonctionnalités premium : Code promo : 6MPJM3WERERYWH36LX (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=6MPJM3WERERYWH36LX) Fisheye Plus(https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) Fisheye Plus est également disponible en téléchargement gratuit cette semaine. Voici aussi un code promo pour essayer ses fonctionnalités premium : Code promo : MX6AKKM6AW7NYX83RP (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=MX6AKKM6AW7NYX83RP) Merci encore pour votre gentillesse et votre soutien. Je l’apprécie sincèrement, et j’espère que ces applications vous seront utiles et agréables à utiliser. ### 1/5 — Disappointing *2017-08-07* Doesn't go back to 0 when silent **Developer response:** Thanks so much for using my app and leaving a review. I really appreciate your support! As an independent developer, feedback and encouragement from users mean a lot to me. To show my appreciation, I’d like to share promo codes for two of my other apps. Decibel Meter Plus Pro(https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) It’s free to download this week. You can use this promo code to try the premium features: Promo Code: 7MXHKR3PH8YMTH4JHL (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=7MXHKR3PH8YMTH4JHL) Fisheye Plus(https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) This app is also free to download this week. You’re welcome to use the promo code below to try its premium features: Promo Code: 387AKWXF6YAYTP38YN (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=387AKWXF6YAYTP38YN) Thanks again for your support. It really helps and encourages me to keep improving my apps! ### 2/5 — About to be abandoned *2017-07-07* Great app but iOS is warning it requires updating. Get on it developers! **Developer response:** Hi, thank you very much for using my app and sharing your review. I’m really grateful for your support. I develop my apps independently, so every review and piece of feedback is very encouraging to me. As a small token of thanks, I’d like to share two promo codes that you can use for my other apps. Decibel Meter Plus Pro(https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) It’s currently free to download this week. You can use the following code to try the premium features: Promo Code: APEYJ3J7T37488KL6H (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=APEYJ3J7T37488KL6H) Fisheye Plus(https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) Fisheye Plus is also free to download this week. Here is a promo code for trying its premium features as well: Promo Code: XAE6PMPY4WEK6NAEKM (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=XAE6PMPY4WEK6NAEKM) Thank you again for your kindness and support. I truly appreciate it, and I hope these apps are useful and enjoyable for you too. ### 1/5 — Worst app *2017-06-01* Do not bother to waste your money. I believe higher rating given to this app are fake. To check legitimacy of the readings I enclosed my phone in a specially made enclosure with high NRC value insulations. But it always shows a wrong reading of 70~80db. I tried to reset it few times but the result remained same. Absolutely fake app **Developer response:** Thanks so much for using my app and leaving a review. I really appreciate your support! As an independent developer, feedback and encouragement from users mean a lot to me. To show my appreciation, I’d like to share promo codes for two of my other apps. Decibel Meter Plus Pro(https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) It’s free to download this week. You can use this promo code to try the premium features: Promo Code: 4HJ4JY6HRWTANXLJT8 (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=4HJ4JY6HRWTANXLJT8) Fisheye Plus(https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) This app is also free to download this week. You’re welcome to use the promo code below to try its premium features: Promo Code: 6WPWPT87NHNMERNW7H (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=6WPWPT87NHNMERNW7H) Thanks again for your support. It really helps and encourages me to keep improving my apps! ### 5/5 — 非常灵敏，实用好软件，也没有广告骚扰，良心作者 *2017-05-26* 不错 **Developer response:** 您好，非常感谢您使用我的 App，并分享您的评价。真的很感谢您的支持！ 我是独立开发者，所以用户的每一条评价和反馈对我来说都非常鼓励。作为一点小小的感谢，我想分享两个优惠码，您可以用于我的另外两款 App。 Decibel Meter Plus Pro (https://apps.apple.com/us/app/decibel-meter-plus-pro/id645214476) 这款 App 本周可以免费下载。您可以使用下面的优惠码来体验高级功能： 优惠码：4MNHR64F6TLTM6877X (https://apps.apple.com/redeem?ctx=offercodes&id=645214476&code=4MNHR64F6TLTM6877X) Fisheye Plus (https://apps.apple.com/us/app/fisheye-plus-retro-photo-video/id659276619) Fisheye Plus 本周也可以免费下载。下面这个优惠码也可以用来体验它的高级功能： 优惠码：MRMTRN6834XYLNNMFN (https://apps.apple.com/redeem?ctx=offercodes&id=659276619&code=MRMTRN6834XYLNNMFN) 再次感谢您的友善和支持。我真的非常感激，也希望这些 App 对您有帮助，并能带给您愉快的使用体验。 ## Frequently asked questions about Decibel Meter Plus ### What does the Decibel Meter app do? This app measures the sound levels around you in real-time, displaying average, peak, and maximum decibel values. It also provides crucial information about noise-induced hearing loss (NIHL) and decibel exposure time guidelines to help you understand how loud is too loud. ### What are the key features of the Decibel Meter app? Key features include easy sound level measurement, clear display of average, peak, and max values, a plotted history of average sound levels, and informative guides on avoiding noise-induced hearing loss. The pro version offers advanced features like data export, calibration, and adjustable sample rates. ### Is the Decibel Meter app free to use? The app is available for free download and use, with certain advanced features designated as 'Pro Version' features. These Pro features can be unlocked, suggesting a freemium or in-app purchase model for full functionality. ### What devices is the Decibel Meter app compatible with? The app is a universal binary, meaning it supports iPad, iPhone, and iPod. It is optimized for the Retina display, ensuring a clear and easy-to-read interface across compatible Apple devices. ### How can this app help me understand sound levels? The app helps you understand sound levels by providing immediate decibel readings in various environments, such as clubs or lectures. It also educates you on the potential dangers of prolonged exposure to loud noises and offers guidelines to prevent hearing damage. ## Version history (last 5 releases) ### 2.1 — 2026-08-29 What’s New ◉ Refreshed the interface with a cleaner modern look ◉ Improved chart presentation and visual consistency ◉ Enhanced readability and overall user experience ◉ Minor fixes and performance improvements ### 2.0 — 2026-07-21 • Discover Decibel Meter Plus Pro and other apps from the developer with new rotating recommendations. • Browse the complete app collection from the About screen. • Improved app icon presentation, localization, and layout across iPhone and iPad. ### 1.9 — 2026-05-23 Thanks for using Decibel Meter Plus. This update includes: • Added support for 44 localized languages • Improved Settings and About pages • Added easier access to Support, Tips, Rate This App, and More Apps • Improved compatibility with modern iPhone and iPad screens • UI refinements for a smoother experience • Stability improvements and bug fixes ### 1.8 — 2026-05-18 Thanks for using Decibel Meter. This update brings the app back to modern devices with: • Support for the latest iPhone, iPad, and iOS versions • Improved layout and compatibility on newer screens • Added in-app Support so you can contact us more easily • Added more language support • Stability improvements and bug fixes ### 1.6 — 2013-10-01 1. Support New device: iPhone 5C and iPhone 5S 2. Support ios7 3. Fix some bugs ## Apps similar to Decibel Meter Plus | App | Rating | Price | Category | | --- | --- | --- | --- | | [Decibel Reader](https://appshunter.io/ios/app/decibel-reader/id6451411046) | 4.5 (24) | Free | Utilities | | [RC Circuit](https://appshunter.io/ios/app/rc-circuit/id824460716) | 4.8 (5) | Free | Utilities | | [IQ Bau](https://appshunter.io/ios/app/iq-bau/id1627669584) | — | Free | Utilities | | [短信狗卫士](https://appshunter.io/ios/app/id6447949251) | 5.0 (1) | $0.99 | Utilities | | [Harmony Lighting](https://appshunter.io/ios/app/harmony-lighting/id1632523840) | 5.0 (4) | Free | Utilities | | [xReload for Safari](https://appshunter.io/ios/app/xreload-for-safari/id1588834516) | 3.7 (3) | $1.99 | Utilities | ## More apps by 华芳 张 - [Fisheye Camera - Retro Lens](https://appshunter.io/ios/app/fisheye-camera-retro-lens/id586041479) - [Camera Protractor - Protractor + Rule can measure real life objects](https://appshunter.io/ios/app/camera-protractor-protractor-plus-rule-can-measure-real-life-objects/id614594487) - [VideoRecord: Pause & Resume](https://appshunter.io/ios/app/videorecord-pause-and-resume/id618657110) - [Decibel Meter Plus Pro](https://appshunter.io/ios/app/decibel-meter-plus-pro/id645214476) - [Fisheye Plus-Retro Photo Video](https://appshunter.io/ios/app/fisheye-plus-retro-photo-video/id659276619) All apps by 华芳 张: https://appshunter.io/developer/586041482 --- *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 2026-09-07.*