Decibel Meter: Noise Recorder

dB Noise Level & Hearing Guard

Only for iPhone

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

iPhone

Your daily noise companion. Measure sound levels, save recordings, track hearing exposure with NIOSH-based alerts, and explore real-time octave spectrum — all on-device. Measure noise around you, protect your hearing, and keep a record of every loud moment — all in one beautifully designed decibel meter. Decibel Meter turns your iPhone into a noise-aware companion for everyday life. Whether you want to check how loud your apartment really is, save a recording of a noisy neighbor, or understand how noise exposure builds through the day, this app makes it simple. Built for parents, renters, commuters, musicians, and anyone curious about the sound around them. MEASURE IN REAL TIME See exactly how loud it is, right now. • Live dB with real-time Min, Avg, and Max • Color-coded level indicator — green for quiet, red for loud • Fast meter that updates instantly as sound changes • Timer tracks how long you have been monitoring • Reference labels compare levels to everyday sounds RECORD & REPLAY Hearing something unusual? Capture it in one tap. • One-tap recording with full dB data • Pause, resume, trim, rename, and organize • Waveform playback — see exactly when peaks occurred • Auto-detect and remove silence for cleaner files • Auto-record when noise exceeds your threshold • Export as M4A, WAV, or MP3 • Batch export multiple recordings at once TRACK HEARING EXPOSURE Noise adds up. The louder it is, the faster safe listening time runs out. • Daily tracker built on NIOSH guidelines (85 dB, 3 dB exchange rate) • Home screen card shows cumulative dose — updated in real time • See how much safe time remains at current levels • Notification when daily exposure approaches warning levels • Each recording saves a snapshot of your exposure • Progress bar shifts green → orange → red as risk increases NOISE TRENDS One reading shows right now. Trends show what is changing. • 24-hour, 7-day, and 30-day charts with avg and peak dB • Spot patterns — weekends vs. weekdays, mornings vs. evenings • Searchable history with date, dB, and sorting filters • Batch select, export, or delete recordings FREQUENCY ANALYSIS (Pro) Not all noise is the same — low rumble, speech, and sharp whines affect you differently. • Real-time 8-band octave spectrum, 31 Hz – 4 kHz • See whether noise is bass, speech-range, or high-pitched • Peak detection highlights the dominant band • Home card shows low / mid / high balance • Useful to ID sources: HVAC hum, traffic, appliance whine EVERYDAY ESSENTIALS No setup, no account, no learning curve. • Clean design — understood in seconds • Threshold alarm with haptic vibration • All data on-device — nothing uploaded, no account needed • M4A and WAV recording formats • Light and Dark themes • 35+ languages SUBSCRIPTIONS Decibel Meter is free to use. Measurement, recording, playback, exposure tracking, trends, and history are included at no cost. Pro unlocks the octave spectrum analyzer and all future Pro features. Payment is charged to your Apple account at confirmation. Subscriptions renew automatically unless turned off at least 24 hours before the period ends. Manage or cancel anytime in Apple ID settings. PRIVACY Audio stays on your device. No account, no uploads. All processing is local. Ads are served via Google AdMob, which may collect anonymous data. Important: Results vary by device and microphone. Decibel Meter is for everyday reference — not a substitute for professional sound level meters, calibrated instruments, compliance testing, or medical advice. Privacy Policy: https://www.decibelmeter.org/appprivacy.html Terms of Use: https://www.decibelmeter.org/appterms.html

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Fixes an issue where some saved recordings could not be opened from history after path resolution changed.

Version 1.0.1

The developer, 励毅 陈, 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 Linked to You

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

    • Purchases

  • Data Not Linked to You

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

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

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
  • 励毅 陈
Size
  • 72.1 MB
Category
  • Utilities
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 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 35 more
  • English, Armenian, Azerbaijani, Bulgarian, Croatian, Czech, Danish, Dutch, Estonian, Finnish, French, German, Greek, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Korean, Latvian, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Vietnamese
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © @ 2026 LI YI
  • Developer Website
  • Privacy Policy