Best Decibel Reader Free Apps

249+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated July 2026

Finding the right decibel reader free apps can be overwhelming with so many options. We've analyzed 249+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Decibel Reader Free Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Decibel Meter Sound DetectorDecibel Meter Sound DetectorFree4.7โ˜… (54K)NoYesAug 2026
2Sound Meter (Decibel)Sound Meter (Decibel)Free4.5โ˜… (3.1K)YesNoAug 2026
3NIOSH Sound Level MeterNIOSH Sound Level MeterFree4.7โ˜… (17K)NoNoAug 2026
4Decibel X:dB Sound Level MeterDecibel X:dB Sound Level MeterFree4.6โ˜… (161K)NoYesAug 2026
5Amazon Kindle: Reading AppAmazon Kindle: Reading AppFree4.9โ˜… (5.8M)NoNoAug 2026
6Decibel ReaderDecibel ReaderFree4.5โ˜… (24)YesYesMay 2026
7Noise Meter - Decibel ProNoise Meter - Decibel ProFreeโ€”NoYesJul 2026
8Decibel Meter MasterDecibel Meter MasterFree4.6โ˜… (2.9K)NoNoAug 2026

Top Picks for Decibel Reader Free

Decibel Meter Sound Detector#1

Decibel Meter Sound Detector by Ashraf Thoppukadavil

Track noise around you.
Editor's Choice
๐Ÿ“Š Productivity
4.7๐Ÿ˜Š(54K ratings)
FreeIn-App Purchases
Decibel Meter Sound Detector screenshot 1
Decibel Meter Sound Detector screenshot 2
Decibel Meter Sound Detector screenshot 3
Decibel Meter Sound Detector screenshot 4

Monitor your surroundings with this decibel meter app. It measures sound levels in real-time, providing clear visual analysis and advanced filtering options. Easily share your readings for documentation or further analysis.

What We Love

  • ๐Ÿ‘ No bloatware
  • ๐Ÿ‘ Quite useful
  • ๐Ÿ‘ Excellent and useful app
  • ๐Ÿ‘ Easy to use

Room to Improve

  • ๐Ÿ› Ads block settings
  • ๐Ÿ› Inaccurate readings
  • ๐Ÿ› Not sensitive at all
Sound Meter (Decibel)#2

Sound Meter (Decibel) by UniCom Technology

Measure the noise level
Strong Contender
๐Ÿ”ง Utilities
4.5๐Ÿ˜(3.1K ratings)
FreeAds
Sound Meter (Decibel) screenshot 1
Sound Meter (Decibel) screenshot 2
Sound Meter (Decibel) screenshot 3
Sound Meter (Decibel) screenshot 4
Sound Meter (Decibel) screenshot 5
Sound Meter (Decibel) screenshot 6

This application measures and displays environmental noise levels in decibels. It offers various visual representations of the data, including gauges, graphs, and numerical readouts. Users can also save their measurement history.

What We Love

  • ๐Ÿš€ Works perfectly
  • ๐Ÿ‘ Easy to use and free
  • ๐Ÿ‘ Good simple UI
  • ๐Ÿ‘ Good basic sound level meter

Room to Improve

  • ๐Ÿ› Spelling mistake ('quiet' spelled as 'quite')
  • ๐Ÿ› Inaccurate readings compared to other apps
  • ๐Ÿ› Requires a subscription for basic recording
NIOSH Sound Level Meter#3

NIOSH Sound Level Meter by EA LAB

Worth Considering
๐Ÿ”ง Utilities
4.7๐Ÿ˜Š(17K ratings)
Free
NIOSH Sound Level Meter screenshot 1
NIOSH Sound Level Meter screenshot 2
NIOSH Sound Level Meter screenshot 3
NIOSH Sound Level Meter screenshot 4
NIOSH Sound Level Meter screenshot 5

This free app measures sound levels and noise exposure using your smartphone. Developed by acoustics experts, it provides professional-grade metrics and guidance on hearing protection and noise prevention.

What We Love

  • ๐Ÿš€ Free and ad-free
  • ๐Ÿ‘ Simple and intuitive interface
  • โš–๏ธ Accurate and reliable measurements
  • ๐Ÿ’ก Useful for monitoring noise levels in various environments

Room to Improve

  • ๐Ÿ› Occasional bugs and crashes
  • ๐Ÿ”Œ Issues with external microphone support
  • ๐Ÿ”‹ Can drain battery when running for extended periods

More Decibel Reader Free apps to explore

4
Decibel X:dB Sound Level Meter
Decibel X:dB Sound Level Meter
Decibel X:dB Sound Level Meter
Frequency Spectrum Analyzer
Free

This app transforms your device into a professional sound level meter, precisely measuring ambient noise pressure. It offers advanced features like frequency analysis, historical data management, and dosimeter functions, making it useful for various applications and entertainment.

Precise sound pressure level measurementFrequency spectrum analysis (FFT, BAR graphs)Historical data recording and export
๐Ÿ”ง Utilities
(161K)
free with in-app purchases
5
Amazon Kindle: Reading App
Amazon Kindle: Reading App
Amazon Kindle: Reading App
Read books. Millions of ebooks
Free

Access a vast library of eBooks, magazines, and comics on your mobile device. Customize your reading experience with adjustable text, brightness, and page-turning options. Look up words, track progress, and sync across devices.

Read purchased eBooksAccess Kindle UnlimitedCustomizable text and display
๐Ÿ“š Books
(5.8M)
free with in-app purchases
6
Decibel Reader
Decibel Reader
Decibel Reader
Measure decibels - SPL meter
Free

Measure ambient noise levels with real-time readings, tracking minimum, average, and maximum decibels. Offers calibration for accuracy and a dark mode for comfortable viewing. This tool helps you understand your sound environment.

Real-time decibel measurementCalibration for accuracyTrack min, average, and max noise levels
๐Ÿ”ง Utilities
(24)
free with in-app purchases
7
Noise Meter - Decibel Pro
Noise Meter - Decibel Pro
Noise Meter - Decibel Pro
Noise Level Frequency Analyzer
Free
๐Ÿ”ง Utilities
(0)
8
Decibel Meter Master
Decibel Meter Master
Decibel Meter Master
Tool for measuring sound level
Free

This tool transforms your iPhone into a professional sound level meter. It accurately measures ambient noise levels, providing real-time decibel readings directly on your device.

Measures sound levelActs as a decibel meterUses iPhone as a meter
๐Ÿ”ง Utilities
(2.9K)
free
9
Decibel - dB Sound Meter
Decibel - dB Sound Meter
Decibel - dB Sound Meter
Noise Level Frequency Analyzer
Free

This app measures and analyzes sound levels in real-time, providing clear decibel readings and tracking noise changes. It offers advanced features like dosimeter functions, visual graphs, and the ability to capture photos and videos with dB overlays. Save and export your sound data for comprehensive insights into your environment.

Real-time decibel readingsAdvanced dosimeter functionsMultiple sound graphs
๐Ÿ”ง Utilities
(20)
free with in-app purchases
10
dB Decibel Meter - Noise Level
dB Decibel Meter - Noise Level
dB Decibel Meter - Noise Level
Sound Level Frequency Analyzer
Free

Measure real-time sound levels with this tool, offering A-weighting and frequency analysis. Record audio, take photos, and capture videos with embedded decibel data for evidence and safety checks. Includes a reference guide for understanding noise ranges.

Real-time SPL measurementA-weighting and frequency weightingAudio recording with decibel data
๐Ÿ”ง Utilities
(18)
free with in-app purchases
11
Decibel Meter - Video dB Meter
Decibel Meter - Video dB Meter
Decibel Meter - Video dB Meter
Sound Level dB Tracker & FFT
Free

This app provides real-time decibel readings, sound level monitoring, and voice-activated noise recording. It allows users to document noise levels with video evidence, including decibel watermarks and timestamps, all processed on-device for privacy.

Real-time dB meter with max, min, averageVoice-activated noise recordingVideo recording with decibel watermark
๐Ÿ”ง Utilities
(1)
free with in-app purchases
12
Sutra โ€” eBook Reader
Sutra โ€” eBook Reader
Sutra โ€” eBook Reader
Read Kavita, Calibre & OPDS
Free

Access your entire book collection from various sources in one beautiful app. Enjoy a customizable reading experience with synced progress, bookmarks, and highlights across devices. Organize your library with series info, search, and collections.

Connect Kavita, Calibre, and OPDS serversEPUB and PDF reading with page-curl effectRich typography and reading themes
๐Ÿ“š Books
(3)
free
13
All Doc Reader & PDF Converter
All Doc Reader & PDF Converter
All Doc Reader & PDF Converter
All-in-one reader & Converter
Free

This app allows you to open, read, scan, and manage various document types like PDFs, Word, Excel, and TXT files. Convert images to PDF and scan paper documents into digital files using your phone's camera.

Read PDF, DOC, XLS, TXT filesScan documents with cameraConvert images to PDF
๐Ÿ“Š Productivity
(1)
free with in-app purchases
14
Decibel meter- db meter noise
Decibel meter- db meter noise
Decibel meter- db meter noise
Accurate decibel meter
Free

Measure sound levels in your environment with this easy-to-use noise meter. Get accurate decibel readings, view real-time graphs, and track maximum sound levels. Ideal for concerts, restaurants, homes, and workplaces.

Accurate decibel measurementReal-time sound level graphMaximum recorded sound level display
๐Ÿ”ง Utilities
(5)
free with in-app purchases
15
Decibel Sir
Decibel Sir
Decibel Sir
by tung fan wei
Free
๐Ÿ”ง Utilities
(0)
16
Decibel - Pro Noise Detection
Decibel - Pro Noise Detection
Decibel - Pro Noise Detection
High precision and real-time
Free
๐Ÿ”ง Utilities
(0)
17
Decibel Meter ยทdB Sleep Sounds
Decibel Meter ยทdB Sleep Sounds
Decibel Meter ยทdB Sleep Sounds
Noise Meter & Sleep Tracker
Free
๐Ÿ’ช Health & Fitness
(0)
18
Decibel Meter: Noise dB Level
Decibel Meter: Noise dB Level
Decibel Meter: Noise dB Level
Sound Analyzer: Audio Spectrum
Free
๐Ÿ”ง Utilities
(0)
19
Decibel Meter - Sound Level.
Decibel Meter - Sound Level.
Decibel Meter - Sound Level.
Measure Noise & Frequency
Free
๐Ÿ”ง Utilities
(0)
20
Decibel Meter dB: Noise Level
Decibel Meter dB: Noise Level
Decibel Meter dB: Noise Level
SPL, Sound & Frequency Test
Free
๐Ÿ”ง Utilities
(0)

FAQ about Decibel Reader Free

What are the best decibel reader free apps for iPhone?
Decibel Meter Sound Detector tops our decibel reader free apps ranking as of July 2026, with a 4.7-star average from 54K App Store ratings, and it's free to download.
Decibel Meter Sound Detector has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 249+ decibel reader free apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
This app functions as a decibel meter, using your device's microphone to measure and display sound levels in decibels (dB) in real-time. It provides clear visual noise analysis and supports advanced filtering for frequency and dB ranges.
Key features include accurate dB measurements, various frequency weighting options (A, B, C, Z), the ability to share readings via email and messaging apps, 1/3 octave band frequency analysis, and display of current, average, and maximum sound values.