Per-window advice
Close, crack open, open wide, or place a fan, based on weather and each window’s orientation.
iOS app · coming soon
Ventilate.
At the right time.
Ventilate uses your home layout, window directions, indoor temperature, and local weather to tell you when to open, when to close, and how to place a fan, without air conditioning.
Coming soon to the App Store
Your home
Building profile, cross-ventilation or single-sided layout, fan inventory.
Weather & transitions
Local forecasts and your next recommended action, with timely reminders.
On your device
No account. Your home data stays local. WeatherKit for weather only.
Heat, without panic.
Close during the day when it’s hotter outside. Open at night when the air cools. Place the fan in the right spot. Ventilate guides you, window by window.
Contact us
A question about Ventilate? Send us a message.