Show HN: Live breath detection and biofeedback from a phone microphone
breathingbiofeedbackself-awarenessmedical knowledgesignal processinghealth UXAndroid/iOS audio issues
Author: felixzeller
Date: 6/2/2026
Article Summary:
A family doctor from Switzerland shares their experience developing a breathing app called shii • haa, which uses phone microphone for live biofeedback, and aims to promote self-awareness through medical knowledge and biofeedback.