dB Decibel: Sound Level Meter

dB Decibel is the most honest, capable sound level meter on your iPhone — and the only one that fixes the #1 complaint about decibel apps: accuracy. Most meters read 50–60 dB in dead silence and cap loud sources. dB Decibel is honest: it tells you when you are below the mic floor and when a sound clips the mic, so you trust every reading. One fair price. No subscription, no tracking. Everything runs 100% on your device. Audio is never recorded or sent. WHAT'S FREE - Live dB(A) sound level meter with peak hold - Clipping + near-silence detection — honest readings - Real pro metrics: Leq, L10 and L90 - Safe-listening time estimate (informational) - Dominant frequency, min/avg/max, live graph - "How loud is it?" reference scale - One-tap guided calibration, landscape, share card - Start/stop from Siri, the Action Button and Control Center dB DECIBEL PRO — one-time purchase - Evidence Mode: timestamped noise-event log with a landlord/HOA-ready PDF and CSV - Live Sound ID: on-device "what is this noise?" - Live Activity + Lock Screen / Home Screen widgets - Exposure & dose: LAeq, 8-hour TWA, daily-dose % (informational) - Octave-band analysis and a test-tone generator - Sleep Soundscape: overnight room-noise timeline - External & Bluetooth mic support with per-input calibration - Real-time spectrum analyzer, loud-level alerts, A/C/Z weighting, fine trim - Session history with auto-save, and removes ads No subscription. Ever. Pay once, keep it forever. Note: dB Decibel is an environmental sound-measurement tool, not a hearing-protection, occupational or medical device. Dose, exposure and safe-time figures are informational; readings are approximate and uncalibrated.