Ventilate: When to Open

Fresh Air & Fan Guide

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

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

  • This app hasn’t received enough ratings or reviews to display an overview.

Thank you for using Ventilate! • New daytime rain advice: we'll tell you when to close • Warnings for the warmest time of day • Fan placement illustrations to make positioning clearer • Every action stays on screen and is easy to tap • Heat toolkit organized into sections, with climate guides and sources • Bug fixes and performance improvements Stay cool, and thanks for your feedback. If you have any questions, contact us at bathilde@vivaceappstudio.fr

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

The developer has not yet indicated which accessibility features this app supports. Learn More

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.
  • Apple Vision
    Requires visionOS 2.6 or later.
Languages
English and 6 more
  • English, Dutch, French, German, Italian, Portuguese, Spanish
Age Rating
9+
In-App Purchases
Yes
  • Weekly Ventilate Pro $0.99
  • Yearly Ventilate Pro $9.99
Copyright
  • © 2026 Vivace App Studio · Ventilate