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Best Decimal X Apps

221+ iOS apps curated and reviewed

4.5 avg rating
18 free apps
Updated June 2026

Out of 221+ decimal x apps on iOS, 18 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Top Picks for Decimal X

Decibel X:dB Sound Level Meter#1

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

Frequency Spectrum Analyzer
Editor's Choice
🔧 Utilities
4.7😐(156K 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

Transform your iOS device into a professional sound level meter with pre-calibrated accuracy and various frequency spectrum analysis tools. Measure sound pressure levels, export data to Health app, and enjoy features like FFT graphs, dosimeter readings, and InstaDecibel for social sharing. Experience the convenience of tracking noise levels with precision and ease.

What We Love

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

Room to Improve

  • 💰 Expensive subscription model
  • 🔒 Misleading free trial
  • 📢 Intrusive ads
NIOSH Sound Level Meter#2

NIOSH Sound Level Meter by EA LAB d.o.o.

Strong Contender
🔧 Utilities
4.7😊(16K 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 award-winning app, developed by acoustics engineers and hearing loss experts, offers a simple and free solution for measuring sound levels accurately. It provides essential metrics, calibration options, educational resources, and expert support, making it a comprehensive tool for monitoring noise exposure and protecting hearing. Click the link to access the app: [NIOSH Sound Level Meter](https:/www.cdc.gov/niosh/topics/noise/app.html).

What We Love

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

Room to Improve

  • 🐛 Occasional bugs and crashes
  • 🔌 Issues with external microphone support
  • 🔋 Can drain battery when running for extended periods
Decibel Meter X#3

Decibel Meter X by 永超 侯

Audio spectrum analyzer
Worth Considering
🔧 Utilities
4.9(18 ratings)
Free
Decibel Meter X screenshot 1
Decibel Meter X screenshot 2
Decibel Meter X screenshot 3
Decibel Meter X screenshot 4
Decibel Meter X screenshot 5
Decibel Meter X screenshot 6

This sound measurement and spectrum analysis tool allows users to easily measure decibel levels, decompose sound into frequency components, and generate specific frequency sounds for various applications. With its intuitive interface and detailed instructions, it's suitable for both beginners and professionals, enabling them to explore and understand sound in-depth.

More Decimal X apps to explore

4
Decibel : dB sound level meter
Decibel : dB sound level meter
Decibel : dB sound level meter
Audio noise Spectrum Analyzer
Free

An advanced sound level meter app with a built-in Spectrum Analyzer for precise measurements. Monitor noise levels, save measurements, export data, and protect your hearing using various features. Download now for accurate sound monitoring and protection.

🔧 Utilities
(36K)
5
Decibel Shield - dB Meter
Decibel Shield - dB Meter
Decibel Shield - dB Meter
Measure Noise & Sound Levels
Free
🔧 Utilities
(468)
6
Decibel Metre (Sound Meter)
Decibel Metre (Sound Meter)
Decibel Metre (Sound Meter)
Measure the environment noise
Free

Measure sound levels with precision using our smart sound level meter app for IOS. This app utilizes your device's microphone to provide accurate decibel readings and visual representations on a graph. Check decibel levels, track fluctuations, and stay informed about your surroundings.

🔧 Utilities
(577)
7
Sound Meter (Decibel)
Sound Meter (Decibel)
Sound Meter (Decibel)
Measure the noise level
Free

Measure environmental noise levels with this sound meter app, displaying decibel values in various forms. Features include gauge indication, noise reference display, recording storage, and more. Try it for an easy way to monitor sound levels!

🔧 Utilities
(2.6K)
8
Sound Meter (dB) - dBShift
Sound Meter (dB) - dBShift
Sound Meter (dB) - dBShift
Quick Sound Analyzer
Free

Measure, record, and analyze sound levels in real-time with a precise mobile app designed for professionals and individuals alike, featuring real-time measurement, sound recording, and graphical analysis. Download the app to start tracking sound levels and receive customizable alerts and historical data insights.

🎵 Music
(18)
9
Decibel Meter Sound Detector
Decibel Meter Sound Detector
Decibel Meter Sound Detector
Track noise around you.
Free

Track environmental noise levels with an easy-to-use decibel meter app that provides detailed analysis through dB and AF readings. Share readings, utilize polling, and explore various features for sound monitoring. Contact info@ashiers.com for more information.

📊 Productivity
(48K)
10
Decibel X PRO: dBA Noise Meter
Decibel X PRO: dBA Noise Meter
Decibel X PRO: dBA Noise Meter
Frequency Spectrum Analyzer
$69.99

Transform your iOS device into a professional sound level meter with our leading noise meter app. Measure sound pressure levels accurately and protect your hearing, whether you're an audio expert or simply curious about your surroundings. See noise levels on your Apple Watch, export data to the Health app, and enjoy features like frequency analysis and dosimeter readings.

🔧 Utilities
(6.9K)
11
Decibel Meter Ultra
Decibel Meter Ultra
Decibel Meter Ultra
Noise Level Frequency Analyzer
Free

Measure the sound levels around you accurately with our Decibel Meter Ultra app. Stay informed and protect your hearing by monitoring noise levels in real-time. Download now for a quieter and safer environment.

🔧 Utilities
(272)
12
Decibel Meter-measure db level
Decibel Meter-measure db level
Decibel Meter-measure db level
Frequency Spectrum Analyzer
Free

A professional decibel meter app for noise detection on your mobile device. Features a new military-grade algorithm, noise recording, classification system, and real-time ambient noise visualization. Subscribe for ad-free experience, sensitive tests, and free access to all toolkits.

🔧 Utilities
(904)
13
Decibel Meter Master
Decibel Meter Master
Decibel Meter Master
Tool for measuring sound level
Free

Measure noise levels with precision using a convenient sound level meter on your iPhone with this app. Download now to accurately gauge sound levels in your surroundings.

🔧 Utilities
(2.9K)
14
Decibel - sound level meter
Decibel - sound level meter
Decibel - sound level meter
Spectrum frequency analyzer
Free

Measure sound pressure and spectrum variations with the Decibel app. Compare recordings to a reference chart, save your history, and enjoy a user-friendly interface. Subscribe for access to premium features and unlimited recordings.

🔧 Utilities
(4.5K)
15
Sound Meter - Simple Detector
Sound Meter - Simple Detector
Sound Meter - Simple Detector
Simple noise decibel meter
Free

This simple sound decibel meter app measures and displays sound levels in decibels, providing a graph and history of readings, and allowing for calibration. Try it out to easily measure sound levels and assess potential noise damage to your hearing.

🔧 Utilities
(35)
16
Decibel - Accurate dB Meter
Decibel - Accurate dB Meter
Decibel - Accurate dB Meter
by 祥祎 刘
Free

Transform your iOS devices into a precise sound meter with this free tool. Measure sound pressure levels to protect your hearing from dangerous decibel levels. Whether for work or leisure, easily gauge sound intensity around you.

🔧 Utilities
(470)
17
Decibelmeter - dB
Decibelmeter - dB
Decibelmeter - dB
Meet geluid met gemak
Free

Measure sound levels effortlessly with the best Decibel Meter app available. Experience easy-to-use functionality for precise sound measurement. Get the app now for accurate decibel readings.

🔧 Utilities
(706)
18
Decibel X PRO - dB Sound Meter
Decibel X PRO - dB Sound Meter
Decibel X PRO - dB Sound Meter
Professional SPL Measurement
$0.99
$1.29 | 23% OFF
🔧 Utilities
(0)
19
Audio / Spectrum Analyzer
Audio / Spectrum Analyzer
Audio / Spectrum Analyzer
RTA (FFT / Octave Analysis)
Free
$10.99 | 100% OFF

This app is a versatile Audio/Spectrum Analyzer that allows users to view and analyze audio waveforms and amplitude spectrums from microphone input. It offers customization options for display settings, FFT size, window functions, waveform generation, and noise signal generation. Additionally, it supports Bluetooth connection policies and offers an option to hide advertisements through an in-app purchase. For a more advanced multi-channel audio signal experience, users can try out the "Multi Wave Oscillator" linked within the app's settings.

🎵 Music
(129)
20
Decibel Meter dB (Sound Meter)
Decibel Meter dB (Sound Meter)
Decibel Meter dB (Sound Meter)
Noise Level Analyzer + Measure
Free

An advanced Sound Level Analyser application that measures sound volume in decibels, providing real-time readings with a volume value timeline and calibration settings for device microphones. It includes an Apple Watch feature for measuring sound volume independently of an iPhone. Experience precise sound measurements with this app - download now!

🔧 Utilities
(1.2K)

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