Decibel X turns your Android device into a calibrated professional sound level meter with ITU-R weightings (ITUR 468, A and C). It delivers real time SPL readings, spectrum analysis, and a feature rich history with export options, making it a versatile tool for professionals and enthusiasts alike. Not ranked in any top lists, it has a broad user base with 5,000,000+ total downloads and 56K new installs in the last 30 days.
Pros & Cons
Calibrated measurements with ITU-R weightings for accurate readings
Comprehensive spectrum analysis with real-time FFT and BAR graphs
Extensive history management with export options (PNG/CSV) and fullscreen playback
NIOSH/OSHA dosimeter standards for occupational safety
No current top-list ranking limits visibility in some rankings
Free tier is ad-supported (one-time in-app purchase available to remove ads)
Permissions include location, camera, and microphone, which may raise privacy considerations
About Decibel X - Pro Sound Meter
Decibel X - Pro Sound Meter is a tools app developed by SkyPaw Co., Limited.
Download Statistics
Decibel X - Pro Sound Meter has been downloaded 6.2 million times. In the last 30 days, the app was downloaded 56 thousand times.
User Ratings
Decibel X - Pro Sound Meter is rated 3.86 out of 5 stars. The rating is based on 12 thousand ratings.
App Information
Decibel X - Pro Sound Meter is FREE to download. The APK download size is 8.23 MB. The latest version available is 9.3.8. The last update was on August 5, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play June 2014.
Description
"Decibel X" is one of very few sound meter apps on the market that has highly reliable, pre-calibrated measurements and supports frequency weightings: ITU-R 468, A and C. It turns your phone device into a professional sound meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful sound meter tool will not only be an essential gadget 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 MAKES "DECIBEL X" SPECIAL:
- Trusted accuracy: the app is carefully tested and calibrated for most devices. The precision is matching with real SPL devices - Frequency weighting filters: ITU-R 468, A, B, C, Z - Spectrum analyzer: 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. - 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 + Fullscreen mode to give overview the whole history of an record - Dosimeter: NIOSH, OSHA standards - InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, etc.). - Beautiful, intuitive and carefully crafted UI design
OTHER FEATURES:
- Standard time weightings (Response Time): SLOW (500 milliseconds), FAST (200 milliseconds) and IMPULSE (50 milliseconds) - Trimming calibration from -50 dB to 50 dB - Standard measurement range from 20 dBA up to 130 dBA - Spectrogram - HISTO graph for plotted history of the recorded values - WAVE graph with 2 display modes: Rolling & Buffer - 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 - "Keep Device Stay Awake" option for long duration recording - Reset and clear current recording at any time - Pause/Resume at any time
NOTES:
- Please do not expect a quiet room reading will be 0 dBA. The range 30 dBA - 130 dBA is the standard usable range and an average quiet room will be about 30 dBA. - Although most devices are pre-calibrated, custom calibration is suggested for serious purposes requiring higher precision and accuracy. To calibrate, you will need a real external device or calibrated sound meter as a reference, then adjust the trimming value until the reading matches with the reference.
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Recent changes: ∿ Fix a crashing issue when capturing photo/video in Camera mode ∿ Components upgrade ∿ Various performance improvements and minor bug fixes
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Comments on Decibel X - Pro Sound Meter for Android
★★★★☆Emman Cian· Jun 1, 2026
Yoo, this app is perfect the Spectrogram for analyzing sounds and effects, but can you add files to put on the spectrogram and other audio analyzers on this app? I Appreciate it 😊
★★★★★Harper· Mar 14, 2026
1 trillion times better than voli, delete voli if you have it
★★★★★sahidul alam· Jul 14, 2026
Very good app, easy to use and read the frequencies almost correctly
★★★★★Olav Døvre· May 27, 2026
Beautiful, it even measures frequency and what frequency has what intensity. Love it
★★★★★Stephen· Aug 1, 2026
Did exactly what I needed it to do. I love the 5-sec video record feature that displays the sound levels. I was able to provide a local manufacturing plant proof that the noise level from coming their factory was in tolerable.
★★★★☆Sheikh Lab· May 11, 2026
Hi The app is very good. 1. Can it give me the csv files of decimal values without saving voice recordings. For example can we disable the voice recording feature but still get the csv file with readings 2. Can it record 24/7 ie non-stop and for how many days 3. Is voice saved only on my device or is it uploaded to your servers too.
★☆☆☆☆Stephanie· Feb 12, 2026
The support feature does not provide support. App says it's recording, but nothing is saved. Don't waste your time.
★☆☆☆☆Dana F· Mar 25, 2026
don't see the ability to connect a Bluetooth microphone, if it is there it's labeled wrong. Also why do we need a subscription for this? This should be a one-time purchase
★☆☆☆☆Andrew D. Royappa· Jun 10, 2026
When you rotate your phone while measuring sound level, it screws up the sound measurement after rotating back (measures everything 150+ dB constantly). Have to fix by clearing storage and cache. Been doing this for several months
★☆☆☆☆Da Skate· Jul 13, 2026
Why does a sound app need video access? Also, the app doesn't even provide the correct decibel readings.
Google Play Rankings for Decibel X - Pro Sound Meter
This app is not ranked
Technologies used by Decibel X - Pro Sound Meter
20 permissions·25 libraries
Subscribe to see full permission and library details
Trust & Safety: Trust and safety: The app requests common Android permissions including location, camera, microphone, and storage, plus ad IDs and license verification. It is ad-supported with an option to remove ads via a one-time purchase. This pattern is typical for feature-rich utility apps; review permissions if privacy is a concern.
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