Decibull
A native iOS hearing-health monitor: real-time SPL metering and a noise-dose meter that warns before the damage adds up.
What it is
Hearing loss is cumulative and silent — by the time you notice, it's done. Decibull is a native iOS app that meters sound pressure in real time and tracks your noise dose against occupational exposure limits, so a loud night out or a long session on monitors shows up as a number that's climbing toward a ceiling, not a vague worry.
How it's built
SwiftUI front end over an AVFoundation audio tap that computes SPL and a frequency-band breakdown; Core Data persists the exposure history. The architecture is MVVM with a dependency container so the analysis services can be swapped and tested. Early-stage, but the metering loop and the dose model are real.