Developer builds free open-source hearing aid app for Android using any earbuds

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A developer has released OpenHearing, a free, open-source Android app that replicates clinical-style hearing assistance without requiring specialized hardware or expensive devices. The app conducts a pure-tone hearing test per ear and applies a custom sound profile to deliver real-time amplification through any standard earbuds with a microphone. The project was motivated by Apple's AirPods Pro hearing feature being restricted to iPhone users, while prescription hearing aids average $4,700 — out of reach for over half of those who need them. OpenHearing is built with a safety-first architecture, featuring a hard-capped limiter as the final audio processing stage and 88 automated tests run on every update. The app explicitly does not claim to be a medical device and is licensed under GPLv3, positioning itself as an accessible entry point below formal hearing care.

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