Decibly: Noise Log & dB Meter

Decibly turns your iPhone into a sound level meter that looks and feels like a real instrument: a large analog gauge with an amber needle, the live reading in crisp numerals, and color zones for quiet, moderate and loud. MEASURE • Live A-weighted decibel reading (dBA), updated 20 times a second • Min, average (Leq) and max for the running session • Scrolling chart of the last 60 seconds • Reference points: 30 whisper · 60 conversation · 80 traffic · 100 danger KEEP THE PROOF • Start/Stop sessions with time, duration, min / avg / max and an optional note ("neighbors drilling", "night shift, hall 3") • History with mini stats and a full chart for every session • Export any session as a one-page PDF report or a CSV file UNDERSTAND • Exposure indicator with NIOSH-style guidance computed from the session average (e.g. about 8 h at 85 dB, about 15 min at 100 dB) — informational only •…