This app turns your iOS device into a professional sound level meter, detects harmful environmental noises, and helps protect your hearing and health.
"Decibel X" is one of very few noise meter apps on the market that has highly reliable, pre-calibrated measurements and supports dBA, dBC. It turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful tool will not only be a great tool for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event? "Decibel X" will help you answer all of those.
WHAT MAKE IT GREAT AND STAND OUT FROM OTHER APPS:
- Trusted accuracy: the app is tested and pre calibrated for all Apple devices. The precision is matching with real SPL devices
- Apple Watch support: see noise level right from your wrist
- Health App integration: export noise levels directly into Health app
- Frequency weighting filters: ITU-R 468, A, B, C, Z
- Powerful, smart history data management:
+ Recording data can be saved into a list of history records for future access and analysis
+ Each record can be exported as hi-res PNG graph or CSV text via sharing services
+ iCloud support which synchronize all history records across your Apple devices
+ Fullscreen mode to give overview the whole history of an record
- Dosimeter with NIOSH, OSHA standards
- Powerful calibration: Linear, Octave 1/1, 1/3, Load/save profile
- FFT and BAR graphs to display real time FFT. Those are very useful for frequency analysis and musical tests. Real time predominant frequency is also displayed.
- InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, Messages, etc.).
- Support Live Activity, Dynamic Island
- Support both Portrait and Landscape layouts
- Beautiful, intuitive and carefully crafted UI design. Themes: LIGHT, DARK and CLASSIC
OTHER GREAT FEATURES:
- Standard time weightings (Response Time): SLOW (500 milliseconds), FAST (200 milliseconds) AND IMPULSE (50 milliseconds)
- MIC Gain Offset from -50 dB to 50 dB
- Standard measurement range from 30 dBA up to 130 dBA
- HISTO graph for plotted history of the recorded values
- WAVE graph with 2 display modes: Rolling & Buffer
- SPECTROGRAPH
- Real time scale level chart
- Display Current, Average/Leq, and Max values with both nice and clear digital and analog layouts
- Quick reference text to help you compare with real-life examples
NOTES:
- Please do not expect a quiet room reading will be 0 dBA. The range 30-130 dBA is the standard usable range and an average quiet room will be about 30 dBA.
- Although all devices are pre-calibrated, custom calibration is suggested for serious purposes requiring higher precision and accuracy. You will need a real external device or calibrated sound meter as a reference, then adjust the trimming calibration until the reading matches with the reference.
* Privacy Policy: http://www.skypaw.com/decibelx/privacy_policy.html
* EULA: http://www.skypaw.com/decibelx/terms.html
Thank you for this free app. It helps me a lot in checking the noise level here in our plant without using the noise gadget.
Best app
Marvin blue3
Best app
It's really nice but,
JK_TP
It drains your battery too fast and the measure of the sound is not accurate sometimes.
Please give me refund to your auto subscription
zyphertrex
I did not mean to subscribe to your app. I thought this app is free. It shocks me when I discovered it credits to my gcash account. Please give me refund, I only tried the app just once.
Thanks for using Decibel X! Here's what's new for the version 9.9.7:
∿ [Fixes] - Camera: the dB readings and the graphs on the overlay now update smoothly along with the live video, instead of looking frozen
Previously in version 9.9.6:
∿ [New] - Siri & Shortcuts: run the app hands-free - start or stop measuring, save a recording, run the dosimeter, take a photo or record a video, create a PDF report, share a recording, change the weighting, set a noise alert and more
∿ [New] - Ask Siri what a term means ("What does TWA mean in Decibel X?") without opening the app
∿ [New] - Search your recordings in the Data tab - by name, note, location or date - or just ask Siri to find them
∿ [New] - Filter recordings by date: Today, last 7 or 30 days, or a custom range
∿ [New] - Swipe a recording to delete it, or drag one straight into Mail, Files or Notes
∿ [New] - Photos, videos and recordings now log the full street address instead of only the city
∿ [New] - The loud noise alert now shows its threshold value right on the meter
∿ [Improvements] - PDF reports are built faster and reused when nothing has changed
∿ [Improvements] - Reports for the running session now include the audio recording
∿ [Improvements] - "Running in background" is now off by default on new installs
∿ [Improvements] - Refreshed look on iOS 26 and iOS 27, and support for the newest devices
∿ [Fixes] - Fix crashes when starting a measurement with Siri, and when leaving the app
∿ [Fixes] - Fix recordings saved through Siri or Shortcuts coming out without audio
∿ [Fixes] - Fix "Stop measuring" telling you it had already stopped while it was still running
∿ [Fixes] - Fix the meter showing a wrong duration, and Reset not clearing it
∿ [Fixes] - Fix deleting several recordings at once leaving their files behind
∿ [Fixes] - Several other minor tweaks & bug fixes
What to expect in upcoming versions:
∿ Support external or bluetooth mics
∿ Hearing test
Version 9.9.7
Subscriptions
Monthly Membership
Get everything Decibel X has to offer
₱ 399.00
Annual Membership
Get everything Decibel X has to offer
Free Trial
The developer, SkyPaw Co., Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Usage Data
Diagnostics
Privacy practices may vary based, for example, on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Dark Interface
Differentiate Without Colour Alone
Sufficient Contrast
Information
Provider
SkyPaw Co., Limited
Size
93.9 MB
Category
Utilities
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
