Decibel Meter: Noise Recorder

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. And when you need to show someone how loud it really was — a landlord, property manager, or HR — turn a saved recording into a clean PDF noise report.

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 (Pro)
• Export as M4A, WAV, or MP3
• Preview a free sample report, then export watermark-free PDF noise reports (Pro)
• 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
• 35+ languages

SUBSCRIPTIONS
Decibel Meter is free to use. Measurement, one-tap recording (keep up to 5 saved recordings), playback, exposure tracking, trends, and history are included at no cost.
Pro unlocks unlimited saved recordings, the octave spectrum analyzer, auto-record above your threshold, watermark-free PDF noise reports, 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. If a free trial is offered, it converts to a paid subscription unless cancelled at least 24 hours before the trial ends.

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