Decibel Meter – Noise Dose

Sound Level & Hearing Safety

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

Measure sound levels in real time and track your daily noise dose. 100% on-device — your microphone data never leaves your phone. No ads, no accounts. Decibel Meter turns your iPhone into a sound level meter — and goes one step further: it tells you when noise starts harming your hearing. MEASURE • Real-time sound level with smooth gauge, Leq, peak and min/avg/max readings • dB(A), dB(C) and dB(Z) frequency weighting with standard Fast/Slow/Impulse response — readings comparable to dedicated SPL meters • Live level curve with a tap-to-enlarge view and the 85 dB NIOSH line • Fullscreen big-display mode — read the level from across the room • Auto-stop timer for fixed-duration measurements (1–60 min) • Reference chart: compare your surroundings to everyday sounds • Works fully offline, instant start ANALYZE (PRO) • Real-time spectrum analyzer: 31 third-octave bands with peak hold • Waterfall spectrogram — see how frequencies change over time • Dominant frequency readout with musical note — see what makes the noise • L10/L50/L90 percentile statistics in every report PROTECT YOUR HEARING • Daily Noise Dose: tracks your exposure against the NIOSH 85 dB / 8h standard • Session TWA, dose and 8-hour projection — switch NIOSH or OSHA in Settings • See how long you can safely stay in your current environment • Home Screen widget keeps your daily dose in sight TRACK • Session history with charts and per-session notes (location, source) • Save finished measurements to Apple Health (optional, write-only) • Share a clean report image with one tap • Start and stop measuring with Siri Shortcuts PRIVATE BY DESIGN • Audio is analyzed in real time on your device — never recorded, never uploaded • No account, no ads, no tracking. Nothing leaves your phone. PRO — PAY ONCE, YOURS FOREVER Upgrade once to unlock the real-time spectrum analyzer and waterfall spectrogram, dB(C)/dB(Z) weightings, PDF & CSV report export, full-history export, a custom alert threshold, a calibration offset, and iCloud history sync. No subscription, no tricks — the price is always shown upfront, and live measuring, noise dose and history stay free forever. Note: readings are for reference and hearing awareness, not a substitute for professional calibrated equipment or medical advice. Privacy policy: https://sparkfallgames.com/decibelmeter/privacy.html

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The developer, Shanghai Sparkfall Network Technology Co., Ltd., 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 Not Collected

    The developer does not collect any data from this app.

    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
    Shanghai Sparkfall Network Technology Co., Ltd.
    Size
    7.7 MB
    Category
    Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Watch
      Requires watchOS 10.0 or later.
    Languages
    English and 32 more
    • English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
    Age Rating
    9+
    In-App Purchases
    Yes
    Copyright
    © 2026 Shanghai Sparkfall Network Technology Co., Ltd.
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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