SoundMeter - Decibel dB Meter

"Isn't this too loud?" "What's the decibel level?" — hold up your phone and see instantly.

SoundMeter uses your iPhone's microphone to measure ambient sound in real time. Beyond raw dB numbers, it labels every reading in plain English — "quiet library", "busy street" — so you understand at a glance. From noise dispute evidence to sharing concert loudness, one app covers it all.

--- Key Features ---

■ Real-Time dB Meter
A half-circle arc meter shows the current volume at a glance. Updated every 100ms with smooth animation, plus MIN / AVG / MAX statistics to track changes over time.

■ Plain-English Sound Labels
30 dB "Quiet Library", 60 dB "Normal Conversation", 90 dB "Very Loud" — 11 levels of intuitive labels help you feel the volume beyond the numbers.

■ Session Recording
Tap "Start Recording" to save a session. Automatically logs 1-second dB samples, start/end times, and optional location tags. Perfect for documenting noise disputes.

■ Time-Series Charts
Swift Charts area graphs visualize your entire session. Color bands in the background instantly show quiet zones vs. warning zones.

■ CSV / PDF Export
Export session data as CSV or PDF. Ideal for attaching to complaint filings, emails to landlords, or property manager reports.

■ Noise Alert Notifications
Set a threshold (30–120 dB) and get notified when exceeded. Choose "every time / every minute / every 5 minutes" — perfect for baby sleep monitoring, construction watch, or concert level checks.

■ Mic Calibration Offset
Manually adjust for your iPhone's mic sensitivity (±7 dB between models). Compare against a professional calibrated meter for higher accuracy.

■ Location Tags
Add location tags like "Downtown Apartment" to each session. Great for scouting apartments or comparing multiple locations.

■ Share Cards
Turn your current dB reading into a shareable card for X or Instagram. "Front row: 105 dB" — bring the experience to your feed.

■ Widget Support
Home Screen widgets show your last measured dB and label. Lock Screen widgets supported too.

■ iCloud Sync
Session records sync automatically via iCloud. Switch devices without losing history.

--- Perfect For ---

・Documenting noise complaints from neighbors
・Scouting apartments for ambient noise levels
・Checking a bedroom's quietness for a sleeping child
・Measuring sound leakage during music practice
・Sharing concert or festival loudness on social media
・Recording construction noise for property management
・Verifying quiet cafés for focused work

--- Privacy First ---

Your audio is never recorded or stored. Only dB values are captured — kept on your device and iCloud. No external transmission ever.

--- Minimal Design ---

Sage green aesthetic — calm, beautiful, grown-up. Not a garish tool, but a meter you're happy to keep on your Home Screen. Full light and dark mode support.

--- More ---

・Full dark mode
・16 languages supported
・iCloud sync
・Remove Ads IAP (one-time purchase)
・All features free

--- Disclaimer ---

This app provides approximate measurements using the iPhone's built-in microphone and is not a substitute for legally certified calibrated equipment. For legally binding measurements, consult a professional.

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Sage Apps Series

A collection of iOS utility apps designed for simplicity and ease of use. Unified design to make your day a little better.

>> Search "Sage Apps" on the App Store for more
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