Noise Meter - Decibel Level

Noise Meter measures sound levels with your iPhone’s microphone and keeps the date and time with every reading. Calibrate in about a minute, record sessions, see Japan’s day and night noise standard on every chart, and share a clean card with the date, time, average and maximum. Measuring, history, calibration and share cards are free. A one-time purchase of Full Features adds CSV and PDF export and background recordings up to 12 hours. No subscription.