Noise Dosimeter: NIOSH & OSHA

Know exactly how loud your world is. Decibel Meter turns your iPhone into a real-time sound level meter, showing the live dB reading of any room, street, concert, or worksite the moment you tap start. Most noise apps just flash a number and forget it. This one remembers. Every reading you save builds a personal noise-exposure record, measured against the same NIOSH and OSHA safe-exposure limits that occupational health professionals use — so you see not just how loud a place is, but how much of your safe daily dose it actually costs your ears. WHAT YOU GET - Live decibel (dB SPL) readings with a moving waveform, updated in real time - A-weighted (dBA) or flat mode, plus a calibration offset to fine-tune accuracy - A custom loud-noise alert that buzzes the moment sound crosses your chosen threshold - Daily noise-dose tracking with a safe-time estimate for the level around you right now - Full measurement history with trend charts so you can spot the places that hurt your ears - A built-in reference scale from a quiet library to a jet takeoff, with hearing-safety tips PERFECT FOR - Concert-goers, DJs, and musicians checking venue and stage levels - Tradespeople and factory workers exposed to power tools and machinery - Parents keeping nurseries, toys, and family events at a safe volume - Anyone with tinnitus or noise sensitivity who wants to protect what hearing they have WHY NOT JUST GUESS? Because hearing damage is silent and permanent. A sound can feel merely "loud" while it is already stealing your hearing minute by minute. A real dB number and a running dose meter turn a vague feeling into something you can actually act on. PRIVACY Every measurement stays on your device. No account, no ads, no tracking, and it works fully offline. FULL ACCESS Live metering and the decibel reference scale are free. A membership unlocks the full toolkit: saving unlimited timed measurements, daily noise-dose and exposure tracking, and your complete history with trend charts. Choose a weekly or yearly plan, or a one-time lifetime purchase. Manage or cancel anytime in Settings. Tap start, listen, and see how loud it really is — then protect your hearing before it is too late. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? https://web-levi.web.app/#contact