Decibel X PRO: dBA Noise Meter

Decibel X PRO: dBA Noise Meter

By SkyPaw Co. Ltd

  • Category: Utilities
  • Release Date: 2017-07-10
  • Current Version: 6.2.2
  • Adult Rating: 4+
  • File Size: 15.62 MB
  • Developer: SkyPaw Co. Ltd
  • Compatibility: Requires iOS 8.0 or later.
Score: 4.5
From 1,474 Ratings


"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 - Frequency weighting filters: 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 - 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. - WAVE graph with 2 display modes: Rolling & Buffer - InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, Messages, etc.). - Support both Portrait and Landscape layouts - Beautiful, intuitive and carefully crafted UI design - Optimized for iOS 11 OTHER GREAT FEATURES: - Standard time weightings (Response Time): SLOW (500 milliseconds) and FAST (200 milliseconds) - Trimming calibration from -15 dB to 15 dB - Standard measurement range from 30 dBA up to 130 dBA - HISTO graph for plotted history of the recorded values - 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 - Tap on Max value to reset at any time - Pause/Resume the tool at any time 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. If you like it or have suggestions, please support us by rating and giving us comments and feedback.



  • Freezes on iPad Pro

    By Appstorereview91
    The app will freeze when trying to save the current sound measurement. Look elsewhere for a reliable sound monitoring app.
  • Nice App

    By den.barb
    The Apple Watch version worked. Now it doesn’t. Just displays zero. Can you fix? Thanks
  • A useful tool

    By Radjin
    On fast mode it’s pretty good at detecting sounds your ear cannot, leaks in systems, failing bearings. I hope in an update the orientation is enhanced. When I attempt to point the microphone at the source for better location the screen only goes as far as landscape. I would also like to switch between different settings to compare without having to go into a separate settings screen interrupting my work.
  • Mistake review

    By Rrices
    Mistake review
  • Nice SPL App

    By Isamu-san
    Love the graphics and options.
  • App is crashes in landscape mode

    By Metaljew
    Just upgraded to the pro version for $5 and the app is now crashing if I rotate my screen into landscape mode. iPhone 8 iOS 11.2.6. Please fix!
  • Opens then Crashes. Don’t wasted your money

    By FLAGert
    The app just opens and crashes on my iPhone 5S, version 11.2.5. Haven’t heard from support yet.
  • Crashed and locked up my iPad Pro almost immediately.

    By Audiovulture
    As above.
  • Great app

    By Rophantom
    You will like this app
  • Misrepresentation of app

    By Pawpawj947
    I should be given a refund due to this app being misrepresented. I feel like this is an example of fraudulent practices by internet salesmen.