Ventilate: When to Open
Fresh Air & Fan Guide
About
This app provides personalized guidance on when to open or close windows and where to place fans based on local weather and indoor temperature. It helps optimize home cooling by suggesting the use of outdoor air when it's cooler, potentially reducing air conditioning use.
What's New in Ventilate
1.14
October 28, 2026
Thank you for using Ventilate! It is now compatible with iOS 27! • Heat toolkit articles in Spotlight; search for them with Siri • Home warnings for tropical nights, rain, cloudy weather, and cold nights • On cloudy days, advice recommends closing the window instead of shading it • On cooler days, open the blinds for daylight and close them at night to keep the warmth in • Notifications only when they are actually useful • Tap anywhere on the main advice card • Day and night remain accurate after the clocks change • Bug fixes and performance improvements Stay cool, and thanks for your feedback. If you have any questions, don't hesitate to contact us at bathilde@vivaceappstudio.fr
MoreSubscriptions & In-App Purchases
Yearly Ventilate Pro
AQI, pollen, UV, humidity and smarter window advice.
Events
Know when to open, close, and use a fan. No AC.
Aug 9, 2026 — Aug 23, 2026
Developer apps
FAQ
What does Ventilate do?
Ventilate provides personalized advice on when to open or close your windows and where to place fans to optimize your home's temperature and air quality. It uses local weather data and your indoor temperature to offer clear, actionable steps.
Is Ventilate free to use?
The core features of Ventilate, including per-window advice, weather-based timing, and temperature history, are free to use. An optional subscription, Ventilate Pro, unlocks additional features like outdoor air quality and pollen data.
What are the benefits of using Ventilate?
Ventilate helps you maintain a comfortable indoor environment by suggesting optimal times for ventilation. It can also help reduce air conditioning usage by recommending the use of cooler outdoor air when beneficial.
Does Ventilate have ads?
No, Ventilate does not contain advertisements. The app is free to use with optional in-app purchases for its Pro subscription.
How does Ventilate Pro work?
Ventilate Pro is an optional subscription that enhances the app's guidance by incorporating outdoor air quality, pollen, and UV index data. This provides clearer advice, especially when cooler air may not be clean air.
Can I cancel my Ventilate Pro subscription?
Yes, you can manage or cancel your Ventilate Pro subscription at any time through your App Store account settings. Subscriptions must be canceled at least 24 hours before the end of the current period to avoid renewal.
What devices does Ventilate support?
Ventilate is currently supported on iPhone devices. It offers features like a Home Screen widget, Live Activity, and Siri integration for convenient access.
How often is Ventilate updated?
The latest version of Ventilate is 1.13, which was last updated on September 24, 2026. Updates typically include improvements to features and performance.
