dB Halo: Sound Meter

On-device decibel meter with frequency analysis, noise-exposure tracking and a sleep sound journal.

iOSfreemium

dB Halo is a sound-measurement utility that turns an iPhone into a decibel meter with live readings, frequency spectrum analysis, and a noise-dose estimator against NIOSH/OSHA exposure criteria. It also includes a sleep journal that classifies sounds like snoring or coughing without saving raw audio. It's for anyone who needs to measure and document sound levels, from home workshops to gyms and concert venues, while keeping all processing on-device.

iOS

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