Open Your Windows vs Open Window

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.

Practical weather information for the day. Open Window uses the forecast to answer everyday questions: what to wear, whether to take an umbrella, when to open a window, and what changes to expect. Included Features • Current weather guidance for outfit, umbrella, ventilation, and outdoor comfort • Temperature, air quality, wind, humidity, rain, and UV details • Current-location weather that updates as you move when location access is allowed • The main current-weather screen remains available after the preview ends 3-Day Preview All Plus features are free for the first 3 days, without a purchase or automatic charge. Includes saved places, custom alerts, detailed forecasts, summaries and supported widgets. An active Plus subscription is required after the preview. Open Window Plus • Continued weather alerts and widgets after the 3-day preview • Custom summary times and quiet hours • Up to four saved places with sorting and place-specific alerts • Detailed hourly views for temperature, air quality, wind, humidity, rain, and UV • Up to 10 days of forecasts, including today • Widgets for multiple places • Direct access to the matching place from an alert or widget • An option to skip repetitive default summaries when there is no meaningful weather change (In-App Purchase) Plus is available as a monthly or yearly auto-renewing subscription. Price and any available offer are shown before purchase. Subscriptions renew automatically unless canceled in your Apple account settings. Location and Privacy • No account is required • Weather data comes from Apple Weather • Air-quality details may be supplemented by the Open Window server where available • Location is used only for app features and optional alerts, not for tracking Device Support • Supports iPhone, iPad, Mac, Apple TV, and Apple Vision Pro • Feature availability varies by platform - Contact: help@paran.app - Terms of Use: https://paran.app/open-window/terms - Privacy Policy: https://paran.app/open-window/privacy/