See the day hour by hour
Compare morning, midday and evening instead of relying on one daily number.
Understand the reason
See whether heat, humidity, particles or ozone contributes to the current guidance.
Plan a practical action
Consider a different time, shorter activity, shade or an indoor alternative.
Designed for adult decision-making
HiAir accounts are for people aged 13 and older. A family or children-outdoor profile is guidance for the adult account holder; it is not a child account and does not diagnose a child’s condition.
Useful before
- Playground visits and family walks
- School travel and outdoor events
- Sports practice and summer activities
- Ventilating bedrooms and shared spaces
For heat, humidity and outdoor air together, read the window-ventilation guide before you plan indoor-outdoor swaps on hot or smoky days.
Personalize the next step
Turn environmental data into a plan for your day
Download HiAir on the App Store. Android is not publicly listed yet — use the Android notify form on the homepage if you want an email when it opens.
Download on the App StoreLast reviewed 2026-08-29. Wellness guidance only — not medical advice.