Lüften

Cool your home naturally

Free · Designed for iPad. Not verified for macOS.

Two notifications a day, zero guesswork. Lüften tells you exactly when to open your windows — and when to close them before the heat returns. Open your windows at the right moment. Close them before the heat gets back in. Lüften watches tonight's forecast and tells you the two moments that matter: when outside has cooled enough to bring fresh air in, and when it's about to warm up again. That's it. WHY IT WORKS Passive cooling — moving cool night air through your home — is one of the most effective ways to keep a house comfortable without air conditioning. The problem is timing: open too early and you let warm air in; wait too long and you miss the cool window. Lüften solves the timing problem. WHAT YOU GET • An alert when outside drops cool enough to open your windows • An alert before the heat returns in the morning • A forecast view showing your opening window for tonight • No indoor sensors, no smart home, no account HOW IT WORKS Set your location once. Lüften fetches your local weather forecast and works out the best window-opening window for tonight. At most two notifications a day — one to open, one to close. PRIVACY FIRST No account. No sign-in. Everything stays on your device. Your location is used only to fetch the local forecast and is never shared.

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The developer, RUBEN JAN K DEPOVER, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Identifiers
    • 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
  • RUBEN JAN K DEPOVER
Size
  • 37.4 MB
Category
  • Utilities
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Copyright
  • © Ruben Depover
  • Developer Website
  • Privacy Policy

    • More by RUBEN JAN K DEPOVER

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