Best Free Decibel App

249+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated October 2026

Finding the right free decibel app 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 Decibel App (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Decibel Meter Sound DetectorDecibel Meter Sound DetectorFree4.7★ (56K)NoYesNov 2026
2Sound Meter (Decibel)Sound Meter (Decibel)Free4.5★ (3.3K)YesNoOct 2026
3NIOSH Sound Level MeterNIOSH Sound Level MeterFree4.7★ (17K)NoNoNov 2026
4Decibel Metre (Sound Meter)Decibel Metre (Sound Meter)Free4.5★ (577)YesNoOct 2026
5Decibel Sound Meter ProDecibel Sound Meter ProFree—YesYesSep 2026
6Decibel: Sound MeterDecibel: Sound MeterFree—NoNoOct 2026
7Decibel GaugeDecibel GaugeFree—NoNoMay 2026
8Decibel Meter ·dB Sound LevelsDecibel Meter ·dB Sound LevelsFree—NoYesOct 2026

Top Picks for Free Decibel App

Decibel Meter Sound Detector#1
4.7😊(56K 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

  • 👍 No bloatware
  • 👍 Quite useful
  • 👍 Excellent and useful app
  • 👍 Easy to use
  • 👍 Simple, clear and accurate
  • 👍 Works fine
  • 👍 Precise and accurate
  • 👍 Straightforward interface
  • 👍 Useful for measuring noise levels
  • 👍 Helpful for hearing conservation
  • 👍 Accurate and convenient
  • 👍 Surprisingly accurate
  • 👍 Clean interface
  • 👍 Stunning masterpiece
  • 👍 Needs more than 5 stars

Room to Improve

  • 🐛 Ads block settings
  • 🐛 Inaccurate readings
  • 🐛 Not sensitive at all
  • 🐛 Dangerously inaccurate
  • 🐛 Unable to record continuously
Sound Meter (Decibel)#2

Sound Meter (Decibel) by UniCom Technology

Measure the noise level
Strong Contender
🔧 Utilities
4.5😐(3.3K 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
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

More Free Decibel App apps to explore

FAQ about Free Decibel App

What is the best free decibel app for iPhone?
Decibel Meter Sound Detector tops our free decibel app ranking as of October 2026, with a 4.7-star average from 56K 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 October 2026.
We track 249+ free decibel app on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.