OpenWindow: Find a better time for fresh air
Is now a good time to open the windows or head outside? OpenWindow turns local weather and air-quality data into practical guidance, with hourly outlooks to help you choose a better time.
Download OpenWindow
Choose your platform below. Check the store listing for device compatibility.
Two everyday questions answered
See separate recommendations for opening your windows and going outdoors. OpenWindow considers temperature, humidity, precipitation, wind, visibility, UV, and air quality using data from Open-Meteo.
Check current conditions. Get a quick view before opening a window, taking a walk, or running errands.
Look ahead by the hour. Find a more comfortable time later in the day.
Choose your location. Use optional device-location access or search for a place manually.
Make repeat checks easy. Save a default location and choose your preferred measurement units.
Start without an account. Use the app in light or dark mode on mobile or desktop.
Plan around your day
Check the outlook before you leave home or compare upcoming hours when your plans are flexible. Weather and air-quality updates require an internet connection. Location permission is optional: manual search gives you another way to get local results.
Get started with OpenWindow
Download for iPhone and iPad, Mac, Android, Windows, Linux.
Questions? Contact OpenWindow support.