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Decibel Meter Plus

Decibel Meter Plus

Noise Level & Sound Meter

125 ratings
107 reviews
🔧 Utilities
$2.99

Details

  • Released
  • Updated
  • May 17, 2013
  • July 21, 2026

Features

Developer

华芳 张
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Decibel Meter Plus screenshot #1 for iPhone
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About

Measure ambient sound levels and understand their impact on hearing. This app provides real-time decibel readings, exposure time guidelines, and information on noise-induced hearing loss. It helps you identify loud environments and learn how to protect your hearing.

✓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
Show original description

What users say

Summarized from real user reviews of Decibel Meter Plus. Based on 125 reviews and a 3.0/5 average, it highlights the 6 positives and 8 negatives reviewers mention most about this Utilities app.

Positive things

  • 👍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

Negative things

  • ❌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
See all reviews

What's New in Decibel Meter Plus

2.0

July 21, 2026

• 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.

More

User reviews

Most RecentHighest RatedLowest Rated

Needs an update

I purchased this app and now it won’t work because the developer needs to update the software. Not cool! Do not purchase.
AJB88899196AJB88899196

太假

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。
好363好好363好

Response from developer

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。

OK but not great

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.
Out of Nicknames11Out of Nicknames11

Disappointing

Doesn't go back to 0 when silent
Wasted999Wasted999

About to be abandoned

Great app but iOS is warning it requires updating. Get on it developers!
S'alright2niteS'alright2nite
See 102 more reviews

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User experience

🐞

Reported Bugs

7 issues

App requires developer updates and iOS compatibility fixes

Bug

Baseline reading of 50-80 dB even in complete silence

Bug

Readings spike dramatically with minimal sound input

Bug

Graph display lacks user control

Bug

Inconsistent measurements in same environment

Bug

Microphone sensitivity cannot be adjusted

Bug

App crashes or fails to function on some devices

Bug
✨

Requested Features

6 requests

Calibration function to adjust readings

Feature

Higher maximum dB limit (120+ dB) for loud events

Feature

Ability to attach photos with meter readings

Feature

Better baseline reset to 0 dB in silence

Feature

dB(A) weighting filter option

Feature

Improved control over graphical display

Feature

FAQ

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.