Hey Product Hunt 👋 I'm Sina, a solo dev from Türkiye. AeroVital is my first app — built because every weather app I tried treated 30°C the same for an asthma user as a marathoner. That gap felt wrong. What it does: pairs Apple HealthKit (HRV, RHR, sleep, recovery) with three live atmospheric APIs (Open-Meteo, AQI, Pollen). Fusion happens entirely on-device. No SDKs, no account, no analytics cloud. The hardest engineering work was honest-computation. When sensors are quiet, the app gracefully says "I don't know yet" instead of inventing a number. Recovery, readiness, respiratory scores all return nil when input signals are missing — UI hides the row instead of zero-filling it. No other health app does this. Why it matters: asthma + allergy users are the most underserved group in mainstream wellness apps. Apple Health doesn't fuse the environment. Weather apps don't read the body. Fitness apps treat air as a footnote. AeroVital sits in that gap. v1.2 just shipped: smart notifications calibrated to YOUR baseline. The bedtime nudge knows your weekly sleep average AND tomorrow's UV/AQI forecast. 4 languages: EN, TR, DE, ES. Honest from day 1. Would love to hear from anyone whose body reacts to the air outside — what does "useful" look like in an app like this? AMA in the comments 👇

AeroVital

Your body × today's air. Honestly computed.

Your body × today's air. Honestly computed.