Noise Dosimeter: NIOSH & OSHA

Live decibel readings with instant alerts — protect your hearing in loud venues, concerts, or at work.

Turn your iPhone into a precise sound level meter. Watch the exact dB reading of any room, street, or venue in real time, then track how much noise you're really exposed to every day.

WHY YOU'LL USE IT • Live SPL readings in decibels, with A-weighted or flat modes • Calibration offset for closer real-world accuracy • Custom loud-noise alerts set at your own threshold • Daily noise-dose tracking against NIOSH and OSHA safe-exposure limits • Full measurement history with stats and trends over time • Built-in reference scale from a quiet room to a jet takeoff, with hearing-safety tips

HOW IT WORKS

1. Tap start and let the microphone listen
2. Watch the live waveform and dB reading update in real time
3. Save the session to build your exposure history and spot risky places

Full access — saved history, exposure-dose tracking, and every hearing-safety tool — unlocks with a weekly or yearly plan, or a one-time lifetime purchase. Manage or cancel anytime in Settings.

Know exactly how loud your world is, and protect your hearing before it's too late.

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