If the last few days have left you drained, sticky, and unsure what to do with your windows, you are not alone. When the heat will not let go, every choice feels heavy: open and let warm air in, or close and trap the warmth you already have?
Ventilate is a calm guide for exactly that moment. It looks at your local weather, your indoor temperature, and each window in your home, then tells you when to close, when to open, and where to place a fan so cool air actually reaches you. No lectures, no guilt. Just clear next steps when your head is too foggy to guess.
If you have air conditioning, check the windows first. When outdoor air is actually cooler, you can cool the home and run the AC less. Ventilate does not invent a number on your bill. It tells you the moment when air from outside can do the work.
Free to use
• Per-window advice: close, crack open, open wide, or fan placement
• Timing that follows the weather, not the clock
• Cool with outdoor air first when it helps, so you use less AC
• See how your indoor temperature has changed since yesterday, with a sparkline on the dashboard
• Temperature history chart: 24 hours, 7 days, or 30 days to see how many degrees you cooled or warmed
• Fan guides for single-sided or cross-ventilation homes
• Gentle reminders before the next change
• Heat toolkit, Home Screen widget, Live Activity, Siri, and Shortcuts
Set up once, then breathe
Point your phone at each window so the app knows which way it faces and what is outside. Log your indoor temperature when you can. A thermometer helps, but you can start without one.
Ventilate Pro, optional subscription
Unlock outdoor air quality, pollen, UV index, and humidity on your dashboard. Pro feeds those signals into a sharper engine, so advice is clearer when cooler air is not always clean air to let in. Core window advice, history, widget, and toolkit stay free.
Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period. You can manage or cancel subscriptions in your App Store account settings.
Terms of Use: https://getventilate.app/terms
Privacy Policy: https://getventilate.app/privacy
Ratings & Reviews
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Thank you for using Ventilate! It’s now compatible with iOS 27!
• Short in-app note when you’re on iOS 27
• Heat toolkit articles in Spotlight; search for them with Siri
• Home warnings for tropical nights, rain, and cold nights
• Tap the outdoor temperature to see the next 12 hours
• Notifications only when they’re actually useful
• 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
Version 1.13
The developer, Vivace App Studio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Location
Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Vivace App Studio
Size
17.1 MB
Category
Lifestyle
Compatibility
Requires iOS 18.6 or later.
iPhone Requires iOS 18.6 or later.
Mac Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
