Version history
Decibel X PRO: dBA Noise Meter
61
ASO score
Text
70/100
Reviews
50/100
Graphic
64/100
Other
0/100
App Rating
4.7
Votes
15.9K
App Age
8y 5m
Last Update
Sep 30, 2025
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Rating
|
4.73
|
4.47
|
+6%
|
|
Number of Ratings (Voted)
|
15.9K
|
743.2K
|
-98%
|
|
App Age
|
8y 5m
|
6y 6m
|
+28%
|
|
Price
|
$40
|
$0
|
|
|
In-app Purchases Price
|
$0
|
$39
|
|
|
Update Frequency
|
67d
|
43d
|
+55%
|
|
Title Length
|
30
|
25
|
+20%
|
|
Subtitle Length
|
27
|
27
|
|
|
Description Length
|
3 992
|
2 666
|
+50%
|
|
Number of Screenshots
|
2297
|
1020
|
+125
%
|
|
Size
|
23MB
|
169MB
|
-86
%
|
Category Ranking in United States
7 days
Last 7 days
Last 30 days
Last 90 days
Last 180 days
Last year
| Top | Dec 05, 2025 | Dec 12, 2025 |
|---|---|---|
|
No results were found!
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| Top | Dec 05, 2025 | Dec 12, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 05, 2025 | Dec 12, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 05, 2025 | Dec 12, 2025 |
|---|---|---|
|
No results were found!
|
||
Ranking Keywords in United States
| Keywords | App Rank |
|---|---|
|
소음
|
out
out
|
|
xao
|
-2
5
-2
|
|
소음측정기
|
out
out
|
|
точные измерения
|
in
1
in
|
|
đo độ ồn
|
in
3
in
|
|
영국항공
|
in
4
in
|
|
лучший уровень
|
in
4
in
|
|
đo tần số âm thanh
|
in
5
in
|
Analyze this and other apps using Asolytics tools
Text ASO
Title
(
Characters:
30
of 30
)
Decibel X PRO: dBA Noise Meter
Subtitle
(
Characters:
27
of 30
)
Frequency Spectrum Analyzer
Description
(
Characters:
3992
of 4000
)
"Decibel X" is the leading noise meter app on the market, which has highly reliable, pre-calibrated measurements and supports dBA, dBC. Our success lies at the intersection of expertise in sound communication, listening to our dear users, and our vision to build a great product. Our app turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. While this pro tool mainly aids audio experts or workers prone to noise pollution, it can also add more fun and protect your hearing. Have you ever wondered how quiet your surroundings are or how loud is a rock concert or football match? "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
- 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.
* 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: http://www.skypaw.com/decibelx/privacy_policy.html
* EULA: http://www.skypaw.com/decibelx/terms.html}
Read more
Other
Additional Information
Version history
9.9.4
Sep 30, 2025
Thanks for using Decibel X! Here's what's new for the version 9.9.4:
∿ [Fixes] - Fix a UI issue for the bottom tab bar
∿ [Improvements] - Upgrade library components
∿ [Improvements] - Several other minor tweaks & bug fixes
What to expect in upcoming versions:
∿ Support external or bluetooth mics
∿ Hearing test
9.9.3
Sep 17, 2025
Thanks for using Decibel X! Here's what's new for the version 9.9.3:
∿ [New Feature] - Support latest iOS 26 and new released devices
∿ [Fixes] - Fix a crashing issue when tapping on Settings twice
∿ [Fixes] - Fix a crashing issue when checking subscription status at launching
∿ [Improvements] - Upgrade library components
∿ [Improvements] - Several other minor tweaks & bug fixes
What to expect in upcoming versions:
∿ Support external or bluetooth mics
∿ Hearing test