Noise Meter: Decibel dB Meter

Sound Level Meter & SPL

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Measure live dB for free. After a meaningful reading, unlock detailed analysis, CSV, and unlimited history once—no subscription or ads. Noise Meter turns your phone into a real-time decibel meter and sound level meter for everyday noise checks. Open the app to see the current dB level on an analog gauge and digital readout. Follow changes on a live 60-second chart and review MIN, AVG (Leq), MAX and PEAK values. Choose A/C/Z frequency weighting or Fast/Slow response, adjust the calibration offset for your device, then save and share the session. MEASURE AT A GLANCE - Real-time decibel (dB) reading - Analog gauge and clear digital display - MIN / AVG (Leq) / MAX / PEAK levels - Live 60-second noise chart - Pause, reset and save sessions - Noise-level reference guide ADJUST THE METER - A, C and Z frequency weighting - Fast (125 ms) and Slow (1 s) response - Per-device calibration offset SAVE AND SHARE - Measurement history with labels - Session details and timeline - Text sharing - CSV export with Premium PREMIUM, ONE-TIME PURCHASE - 1/3-octave spectrum analyzer with peak hold - L10 / L50 / L90 statistics - NIOSH and OSHA dose estimates with 8-hour TWA - Unlimited measurement history - CSV export USE IT TO CHECK - Noise at home or from nearby rooms - Office, cafe and street sound levels - TV, music and speaker volume - General workplace noise awareness PRIVATE BY DESIGN Audio is analyzed on your device and is not stored or uploaded. REFERENCE ONLY Phone microphones and readings vary by device and environment. Noise Meter does not replace a calibrated professional sound level meter and should not be used as legal evidence or as the sole basis for health and workplace-safety decisions.

Ratings & Reviews

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A clearer result-first Premium path: measure live dB free, then unlock detailed analysis, CSV export, and unlimited history after a meaningful reading. The same one-time lifetime purchase remains—no subscription. Text sharing and the first 10 saved sessions stay free, and a canceled purchase returns you safely to your result.

Version 1.0.1

The developer, Sunwoo Kim, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Sunwoo Kim
Size
  • 56.3 MB
Category
  • Utilities
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 2 more
  • English, Japanese, Korean
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 SecondEarth AI
  • Developer Website
  • Privacy Policy

    • More by Sunwoo Kim