Decibel: Sound Meter Pro is made and published by jiahao zhang. AppBrain is an independent app data site and isn't affiliated with jiahao zhang. The app name, icon, screenshots and description belong to jiahao zhang and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- June 11, 2026
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Releases
Updates seen on the App Store- Version
- 1.1.3
- Launched
- May 2026
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 1.73 MB
- Content rating
- Medium
Technologies used by Decibel: Sound Meter Pro
About the app and developer
About Decibel: Sound Meter Pro
Decibel: Sound Meter Pro was an utilities app developed by jiahao zhang. It was removed from the App Store Sep 4, 2026.
User Ratings
The app had no ratings.
App Information
Decibel: Sound Meter Pro was free. The app size was 1.73 MB. The last available version was 1.1.3. The last update was on June 11, 2026.
Technical Requirements
The app had a content rating of Medium Maturity. The app had been available on the App Store since May 2026.
Developer information for jiahao zhang
Address:
Store listing
By jiahao zhang, from the App StoreDescription by jiahao zhang Written by the developer, not by AppBrain. Click to read.
Wear an Apple Watch on a job site, in a club, or in a stadium and watch the live SPL on your wrist. Cross 90 dB and the wrist buzzes. End the day with a PDF noise-exposure report you can hand to HR, your doctor, or a workers'-comp lawyer.
No microphone audio leaves the device. Ever. The DSP runs in milliseconds in Apple's Accelerate framework. No subscription "fleet platform," no ads.
WHAT'S MEASURED
• Live LAeq, LAmax and LCpeak — the full SLM toolkit
• A / C / Z frequency weighting (IEC 61672)
• Statistical L10 / L50 / L90 percentiles
• OSHA 90 dB(A) and NIOSH 85 dB(A) dose accumulators
• Permissible exposure time at the current level
• 1-second sliding LAeq and 125 ms Fast time-weighting
• Apple Watch live wrist meter with threshold haptics
EXPORT
• PDF dose report — printable, photographable, suitable for HR or workers'-comp documentation
• Per-second history chart inside the app
PRIVACY
• No microphone audio is ever recorded, stored, or transmitted
• No tracking SDKs. No analytics SDKs. No ads. No accounts.
• Zero network requests during measurement
WHO USES DECIBEL
• OSHA-aware blue-collar workers (construction, manufacturing, oil & gas)
• Live-sound engineers, DJs, musicians, and stage crew
• Parents monitoring kids' bedroom and daycare noise levels
• Wedding / party planners staying within sound-level limits
• Older adults wanting quantitative awareness of environments
SUBSCRIPTIONS
• Free: live LAeq (A-weighting), large-digit display, 7-day history
• Pro ($3.99/mo or $24.99/yr · 7-day free trial): C/Z weighting, LAmax/LCpeak/Ln, OSHA & NIOSH dose, PDF reports, Apple Watch live meter, unlimited history
• Pro+ ($9.99/mo or $59.99/yr · 14-day free trial): manual ±5 dB calibration trim, per-microphone profiles
Trial: 7 days for Pro, 14 days for Pro+, one trial per Apple ID.
CALIBRATION DISCLAIMER
iPhone microphones are not Class 1 / Class 2 certified hardware. Decibel readings are intended for personal awareness and screening, not legal regulatory evidence. For legal compliance use a certified meter calibrated by an accredited lab.
Privacy: https://leexuanxuan95-dev.github.io/decibel/privacy.html
Terms: https://leexuanxuan95-dev.github.io/decibel/eula.html
Support: jasperabundant@gmail.com