Decibel X:dB Sound Level Meter

Decibel X:dB Sound Level Meter

By SkyPaw Co. Ltd

  • Category: Utilities
  • Release Date: 2011-11-05
  • Current Version: 8.1.3
  • Adult Rating: 4+
  • File Size: 31.81 MB
  • Developer: SkyPaw Co. Ltd
  • Compatibility: Requires iOS 9.0 or later.
Score: 4.5
From 64,501 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: 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 - 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. Get Decibel X Premium and enjoy: - Permanently remove all advertisements - Unlock ITU-R 468, A, B, C frequency filters - No limits when saving data * Choose from different subscription options. Our standard subscription options are: 1-month Subscription 1-year Subscription * Subscription payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term. Subscription with a free trial period will automatically renew to a paid subscription. You can cancel your subscription or free trial in the iTunes settings at least 24-hours before the end of the free trial period. The cancellation will take effect the day after the last day of the current subscription period and you will be downgraded to the free service. * Please note: any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period. * Privacy Policy: * EULA:

FESTICKET Traveller Guide



  • Excellent

    By lp apple
    I really like this decibel meter!
  • Too busy with all the extra ads and nonsense

    By Jazzytaff
    Too busy
  • Great tool

    Helped design sound reduction for emergency generator, to keep neighbors happy.
  • Dissatisfied

    By Lil Vandross
    Can use while in Bluetooth mode!!!!
  • Is a scam forcing subscriptions

    By qhdockentbskakai
    Use other tools with honest business models.
  • Awesome app

    By Dustin3214512321
    Not sure the accuracy but it seems to be ballpark enough. I like how it graphs over time the decibel level. This helps me keep track when working with power tools my sound exposure. I just wish I could purchase the app for a one time price instead of a subscription.
  • Love the app

    By Colin Steinberg
    I love this app, but I would like the app to change from light to dark automatically
  • Sleep consultant here

    By Pediatric Sleep Consultant
    I use this app to test the sound machines of my clients all the time. Love the dark screen as not bright in the dark.
  • Everyone Should Have It!

    By CrazyGamer330
    Having a decimal meter on your phone is so important in today’s very loud world if you want to protect your hearing. The high levels of sound in exercise classes, gyms, movie theaters, restaurants, sporting events, concerts can all be extremely damaging to hearing, even with very brief exposure. With this app you can check your environment instantly and know whether you should protect yourself with earplugs or remove yourself entirely. It’s excellent and I highly recommend it. It works great!
  • Charged for a month subscription not 3 day trial

    By Leinad Namrednim
    I agreed to the 3 free day trial offered when I first opened the app. After trying it (I thought for a few minutes) I went to my subscriptions to cancel it so I wouldn’t be charged in 3 days and realized I had cancelled a full months membership which I had been charged instead of free trial. I asked Apple for refund due to mistake but Apple doesn’t refund purchases anymore so I got scammed out of a months membership I will not use because I didn’t want it and immediately deleted off my phone so as not to be scammed out of anymore funds.....big time regret on ever downloading this app, BEWARE!!!!!!!!!!!!!!!!!!!!