Open Your Windows
Fresh air, without guesswork.
Free · Designed for iPad. Not verified for macOS.
Fresh air, without the guesswork.
Open Your Windows gives you one simple answer: is right now a good time to open the windows?
Most days you want fresh air. But checking a weather app, an AQI app, and a pollen app to decide takes five minutes and three different recommendations. Too long if you'd like to check several times a day, and if it's important to you to get fresh air.
This app looks at all of it — temperature, humidity, dewpoint, air quality, pollen, wind gusts, and rain forecasts — and gives you one clear recommendation with a plain-English reason.
What you see
— Open, Maybe, or Keep Closed. One answer, right now.
— Plain-language reason ("It's a comfortable 72° and AQI is 42 — in the good range.")
— Short-term outlook so you know how long conditions will hold.
— Home screen widget in two sizes for glance-and-go checks.
— Parameter detail when you want to see the why.
— Pollen sensitivity toggle for allergy-prone households.
How it decides
It's not AI. It's a deterministic rule engine with thresholds tuned for real household comfort. Hard vetoes for unsafe air. Soft modifiers for things that affect how pleasant it'll feel. Short-term forecast awareness so you're not told to open right before a storm. Hysteresis so the answer doesn't flip every two minutes on borderline days.
If conditions are genuinely borderline, it says Maybe and tells you why. If something upstream breaks or good weather data are not available, it says so instead of guessing. Trust comes from predictability.
Privacy, seriously
— No account. No login. No tracking.
— Your location is used to fetch weather for your spot, then discarded. Never stored on our servers.
— Analytics are anonymous. No device IDs. No IP addresses. No location.
— API keys for weather, AQI, and pollen providers stay on our backend. Your phone never talks to them directly.
Who it's for
Anyone who loves fresh air and doesn't love checking three apps to decide. Parents of kids with allergies. People with asthma. Anyone who's opened the windows on a day the pollen count was secretly brutal and paid for it the next morning.
Not a medical device. This is a household comfort tool, not allergy advice. If you have serious respiratory conditions, talk to your doctor — but let this app take "is today a good day?" off your list.
Built in the spring in the Midwest by one person with allergies and asthma who wanted an app that just gives him the answer.
Tightening based on early-user feedback:
• More accurate rain handling — 70–90% chance forecasts no longer alone tip a clear day to "Maybe"; only the next-hour likelihood matters now, and minutely radar still triggers immediately when rain is starting.
• The temperature in the reason sentence now matches the temperature in the Conditions card exactly. No more 47 vs 48 mismatches.
• Widget metric chips now stay readable at all sizes — no more vertical character stacking on the medium widget.
The developer, JoeldCo, LLC, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joeldco, LLC
- Size
- 4.2 MB
- Category
- Weather
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 JoeldCo, LLC