Version history
Decibel X:dB Sound Level Meter
66
ASO score
Text
63/100
Reviews
100/100
Graphic
60/100
Other
0/100
App Rating
4.6
Votes
517.98K
App Age
14y 1m
Last Update
Sep 30, 2025
iAP
$1.99 - 44.99
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Rating
|
4.62
|
4.47
|
+3%
|
|
Number of Ratings (Voted)
|
515.2K
|
743.2K
|
-31%
|
|
App Age
|
14y 1m
|
6y 6m
|
+115%
|
|
In-app Purchases Price
|
$26
|
$39
|
-34
%
|
|
Update Frequency
|
89d
|
43d
|
+107%
|
|
Title Length
|
30
|
25
|
+20%
|
|
Subtitle Length
|
27
|
27
|
|
|
Description Length
|
2 991
|
2 666
|
+12%
|
|
Number of Screenshots
|
2106
|
1020
|
+107
%
|
|
Size
|
81MB
|
169MB
|
-52
%
|
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!
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||
Ranking Keywords in United States
| Keywords | App Rank |
|---|---|
|
소음
|
out
out
|
|
소음측정기
|
out
out
|
|
замер шума
|
out
out
|
|
측정기
|
out
out
|
|
đo độ ồn
|
in
1
in
|
|
đo âm thanh
|
in
1
in
|
|
đo tần số âm thanh
|
in
1
in
|
|
уровень шума
|
in
1
in
|
|
app chỉnh âm thanh
|
in
2
in
|
|
chỉnh hz
|
in
2
in
|
Analyze this and other apps using Asolytics tools
Text ASO
Title
(
Characters:
30
of 30
)
Decibel X:dB Sound Level Meter
Subtitle
(
Characters:
27
of 30
)
Frequency Spectrum Analyzer
Description
(
Characters:
2991
of 4000
)
"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}
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