NIOSH Sound Level Meter Downloads & RevenueNIOSH Sound Level Meter · App Store
NIOSH Sound Level Meter is #196 in Utilities Free in Canada and charting in 1 of 30 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
DeveloperEA LAB
CategoryUtilities
PriceFree
Released
Rating★ 4.6 (2.2k)
Version1.6.0
Age rating4+
First seen by us
29 Sep 2026
29 Sep 2026Installs (est.)1M+ worldwide
NIOSH Sound Level Meter update history & changes
Last change · 6 events since 13 Jan 2017Full timeline ↓📦Updated to version 1.6.0📦First update in 162 days📈Charting in a new country🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 6 events
- 📦NIOSH Sound Level Meter updated to version 1.6.0- Measuring in the background and with the screen locked now works correctly
- Projected dose is now calculated correctly
- Improved accuracy on more iPhone and iPad models
- Bug fixes and performance improvements - 📦NIOSH Sound Level Meter: first update in 162 days
- 📈NIOSH Sound Level Meter charting in a new countryAustralia
- 🆕NIOSH Sound Level Meter first spotted by AppInsider#93 in Top Free · Utilities · Canada
- 📦NIOSH Sound Level Meter version 1.5.0Support for arbitrary sample rates, bug fixes
- 🆕NIOSH Sound Level Meter released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.6 ★
2.2k ratings
Measured
Best rank now
#196
Utilities FreeMeasured
New ratings a week
7.6
▲ +89% vs the 2 weeks before
Measured
NIOSH Sound Level Meter on the App Store
App details
App ID
1096545820
Publisher
EA LAB d.o.o.
On the store since
Jan 2017
9 years on the store
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Content rating
4+
Languages
2
EN ES
Size
6 MB
Also listed in
Health & Fitness
NIOSH Sound Level Meter downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where NIOSH Sound Level Meter's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Canada | UtilitiesFree | #196 |
Apps near NIOSH Sound Level Meter on the chart
Utilities Free, around #196.
Ratings
App Store, worldwide.
Rating
4.6 ★
2.2k ratings
Measured
Ratings
2.2k
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
7.6
▲ +89% vs the 2 weeks before
Lifetime rating
4.6★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
79/100
faster than 79% of Utilities apps
Growing fastest in Canada ▲ +89%
New ratings by country (2)
| Country | New ratings a week | Share | Last 2 weeks vs the 2 before |
|---|---|---|---|
| Canada | 6 | 79% | ▲ +89% |
 Australia | 1.6 | 21% | – |
App Store ratings in the countries we track, 4-week average.
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About NIOSH Sound Level Meter
This award-winning app combines the best features of professional sound level meters and noise dosimeters into a simple, easy-to-use package.
- Developed by experienced acoustics engineers and hearing loss experts.
- Completely FREE – No ads, no limited features, and no in-app purchases.
- Tested and validated (accuracy ± 2 dBA) according to standards in a reverberant chamber at NIOSH acoustics lab – the only proper method to validate accuracy.
- Trusted source and world-class expertise in noise and hearing research.
- Meets Type 2 requirements of IEC 61672:3 SLM standard when used w/ external microphone.*
- Provides the most relevant metrics found in professional sound instruments today. Averages such as LAeq and TWA, Max and Peak Levels, Noise Dose and Projected Dose according to NIOSH and OSHA standards, and all three major weighting networks (A, C, and Z).
- Capability to calibrate either internal or external microphone. Reporting and Sharing data.
- Up-to-date informational screens on what noises are considered hazardous, how to conduct a noise measurement, how to properly select a hearing protector, and guidelines for preventing hearing loss, all at the palm of your hand.
- Excellent and timely support from NIOSH hearing experts.
- Support for Apple's Health (Hearing) app.
* Celestina M, Hrovat J, Kardous CA [2018]. Smartphone-based sound level measurement apps: Evaluation of compliance with international sound level meter standards. Applied Acoustics, 139:119-128. https://doi.org/10.1016/j.apacoust.2018.04.011
More resources (including instructional videos and a user manual), a science blog, FAQ, and information about how to interpret results can be found on the NIOSH SLM website https://www.cdc.gov/niosh/topics/noise/app.html
- Developed by experienced acoustics engineers and hearing loss experts.
- Completely FREE – No ads, no limited features, and no in-app purchases.
- Tested and validated (accuracy ± 2 dBA) according to standards in a reverberant chamber at NIOSH acoustics lab – the only proper method to validate accuracy.
- Trusted source and world-class expertise in noise and hearing research.
- Meets Type 2 requirements of IEC 61672:3 SLM standard when used w/ external microphone.*
- Provides the most relevant metrics found in professional sound instruments today. Averages such as LAeq and TWA, Max and Peak Levels, Noise Dose and Projected Dose according to NIOSH and OSHA standards, and all three major weighting networks (A, C, and Z).
- Capability to calibrate either internal or external microphone. Reporting and Sharing data.
- Up-to-date informational screens on what noises are considered hazardous, how to conduct a noise measurement, how to properly select a hearing protector, and guidelines for preventing hearing loss, all at the palm of your hand.
- Excellent and timely support from NIOSH hearing experts.
- Support for Apple's Health (Hearing) app.
* Celestina M, Hrovat J, Kardous CA [2018]. Smartphone-based sound level measurement apps: Evaluation of compliance with international sound level meter standards. Applied Acoustics, 139:119-128. https://doi.org/10.1016/j.apacoust.2018.04.011
More resources (including instructional videos and a user manual), a science blog, FAQ, and information about how to interpret results can be found on the NIOSH SLM website https://www.cdc.gov/niosh/topics/noise/app.html
Latest updates
1.6.0
- Measuring in the background and with the screen locked now works correctly
- Projected dose is now calculated correctly
- Improved accuracy on more iPhone and iPad models
- Bug fixes and performance improvements
1.5.0
Support for arbitrary sample rates, bug fixes
