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Best Free Sound Measure Apps

249+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated September 2026

Finding the right free sound measure 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 Free Sound Measure Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Decibel X:dB Sound Level MeterDecibel X:dB Sound Level MeterFree4.6★ (162K)NoYesSep 2026
2NIOSH Sound Level MeterNIOSH Sound Level MeterFree4.7★ (17K)NoNoSep 2026
3Sound Meter (Decibel)Sound Meter (Decibel)Free4.5★ (3.1K)YesNoSep 2026
4Decibel Meter Sound DetectorDecibel Meter Sound DetectorFree4.7★ (54K)NoYesSep 2026
5Decibel Meter MasterDecibel Meter MasterFree4.6★ (2.9K)NoNoSep 2026
6Noise Meter - Sound & DecibelNoise Meter - Sound & DecibelFree—YesNoSep 2026
7Decibel Meter dB (Sound Meter)Decibel Meter dB (Sound Meter)Free4.4★ (1.3K)YesYesSep 2026
8Sound Analyzer - dB MeterSound Analyzer - dB MeterFree—NoYesMay 2026

Top Picks for Free Sound Measure

Decibel X:dB Sound Level Meter#1

Decibel X:dB Sound Level Meter by SkyPaw Co., Limited

Frequency Spectrum Analyzer
Editor's Choice
🔧 Utilities
4.6😐(162K ratings)
FreeIn-App Purchases
Decibel X:dB Sound Level Meter screenshot 1
Decibel X:dB Sound Level Meter screenshot 2
Decibel X:dB Sound Level Meter screenshot 3
Decibel X:dB Sound Level Meter screenshot 4
Decibel X:dB Sound Level Meter screenshot 5
Decibel X:dB Sound Level Meter screenshot 6

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.

What We Love

  • ⭐ Excellent app
  • 👍 Easy to use and understand
  • 🔍 Useful for various applications
  • 🎓 Helpful for hearing protection
  • 🔧 Accurate and reliable

Room to Improve

  • 💰 Expensive subscription model
  • 🔒 Misleading free trial
  • 📢 Intrusive ads
  • 🤖 Inaccurate readings compared to professional meters
  • 🤔 Confusing interface
NIOSH Sound Level Meter#2

NIOSH Sound Level Meter by EA LAB

Strong Contender
🔧 Utilities
4.7😊(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

  • 🚀 Free and ad-free
  • 👍 Simple and intuitive interface
  • ⚖️ Accurate and reliable measurements
  • 💡 Useful for monitoring noise levels in various environments
  • 🔍 Provides detailed noise data and exposure information

Room to Improve

  • 🐛 Occasional bugs and crashes
  • 🔌 Issues with external microphone support
  • 🔋 Can drain battery when running for extended periods
  • 📱 Limited iPad optimization
Sound Meter (Decibel)#3

Sound Meter (Decibel) by UniCom Technology

Measure the noise level
Worth Considering
🔧 Utilities
4.5😐(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

  • 🚀 Works perfectly
  • 👍 Easy to use and free
  • 👍 Good simple UI
  • 👍 Good basic sound level meter
  • 👍 Very easy and simplified display
  • 👍 Super convenient, very useful
  • 👍 Accurate sound measurement

Room to Improve

  • 🐛 Spelling mistake ('quiet' spelled as 'quite')
  • 🐛 Inaccurate readings compared to other apps
  • 🐛 Requires a subscription for basic recording
  • 🐛 Imprecise metering, not a reliable tool
  • 🐛 Doesn't work in split screen
  • 🐛 Poorly documented statistics

More Free Sound Measure apps to explore

FAQ about Free Sound Measure

What are the best free sound measure apps for iPhone?
Decibel X:dB Sound Level Meter tops our free sound measure apps ranking as of September 2026, with a 4.6-star average from 162K App Store ratings, and it's free to download.
Decibel X:dB Sound Level Meter has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ free sound measure apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Decibel X turns your iOS device into a professional sound level meter. It precisely measures the sound pressure level (SPL) around you and offers advanced features like frequency spectrum analysis and historical data management.
Key features include trusted accuracy with pre-calibrated measurements, Apple Watch support, Health App integration, various frequency weighting filters (A, C, Z, ITU-R 468), powerful history data management with export options, dosimeter functions, and real-time FFT and BAR graphs for frequency analysis.