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Decibel X:dB Sound Level Meter

Decibel X:dB Sound Level Meter

Frequency Spectrum Analyzer

156K ratings
722 reviews
📚 Education
🔧 Utilities
Free
In-App Purchases

Details

  • Released
  • Updated

Features

Developer

SkyPaw Co., Limited
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iphone
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🧾$1.99 - $49.99
In-App Purchase↘︎
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Reviews summary↘︎
⭐722
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🔄6+ apps
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❓5 answered
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📦~ in 2 months
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About

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 measurement
✓Frequency spectrum analysis (FFT, BAR graphs)
✓Historical data recording and export
✓Dosimeter with NIOSH, OSHA standards
✓Apple Watch and Health App integration
✓Customizable calibration and filters
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What users say

Summarized from real user reviews of Decibel X. Based on 156K reviews and a 4.7/5 average, it highlights the 5 positives and 5 negatives reviewers mention most about this Utilities app.

Positive things

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

Negative things

  • 💰Expensive subscription model
  • 🔒Misleading free trial
  • 📢Intrusive ads
  • 🤖Inaccurate readings compared to professional meters
  • 🤔Confusing interface
See all reviews

What's New in Decibel X

9.9.5

April 4, 2026

Thanks for using Decibel X! Here's what's new for the version 9.9.5: ∿ [Fixes] - Fix an issue with restoring purchases in paywall screen ∿ [Fixes] - Fix an UI issue for the bottom tab bar ∿ [Improvements] - Support for new devices ∿ [Improvements] - Upgrade library components ∿ [Improvements] - Several other minor tweaks & bug fixes What to expect in upcoming versions: ∿ Support external or bluetooth mics ∿ Hearing test

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Subscription plans

Monthly Membership

Get everything Decibel X has to offer

$5.991 Month
How to cancel Decibel X subscription ⁉️
12

In-App Purchases

$2.99

Data Export

No limits when saving data

User reviews

Most RecentHighest RatedLowest Rated

PSSAII

This tool is a must for SLPs‼️
PGscansPGscans

Annoying

How do I delete this app
FilmsgtFilmsgt

Great app

I love this application and I highly recommend it. I learned about it from my audio engineering teacher.
LZA CLZA C

Magnifique

I am indeed, not a paying subscriber, yet, however I am indeed, very much appreciative, of the care, the time and the attention to detail this group of people have put into this accurate and visually pleasing app, so far, so thank you ✨💫🌟⭐️
tomtr909tomtr909

Jimmy Rees

It suck like a vacuum cleaner meaning it does its job well.
Kangarro JawboneKangarro Jawbone
See 717 more reviews

Developer apps

Decibel X PRO: dBA Noise Meter
Decibel X PRO: dBA Noise Meter

Frequency Spectrum Analyzer

🔧 Utilities

(6.9K)

$69.99
See developer apps

User experience

🐞

Reported Bugs

3 issues

App crashes when deleting recordings

Bug

Microphone issues on certain devices

Bug

Saved files not accessible after updates

Bug
✨

Requested Features

5 requests

Add GPS coordinates to recordings

Feature

Improve reporting and data export

Feature

Provide more weighting options

Feature

Extend frequency range

Feature

Allow music playback while using the app

Feature

FAQ

What does Decibel X do?

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.

What are the key features of Decibel X?

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.

Is Decibel X free to use?

The app is free to download and use, but it offers in-app purchases for additional features and functionalities. This allows users to access core features for free while enabling advanced options for those who need them.

What devices is Decibel X compatible with?

Decibel X is designed for iOS devices and is tested and pre-calibrated for all Apple devices. It also supports Apple Watch for convenient on-wrist monitoring and can integrate with the Health App.

What are some common use cases for Decibel X?

Common use cases include measuring the noise level in your room, assessing the loudness of concerts or sporting events, conducting acoustic analysis, monitoring noise exposure for health and safety compliance (using dosimeter features), and for musical tests and frequency analysis.