OpenAir vs Coolhouse

OpenAir helps you decide when to open or close your windows using outdoor weather and your comfort settings. It checks outdoor temperature, dew point, rain, and wind, then gives you a clear recommendation. Explore up to 10 days of hourly temperature and dew point charts, with your comfort limits and window guidance shown alongside them. Use OpenAir to: * See a simple open or close recommendation * Find upcoming periods when outdoor conditions suit your preferences * Check temperature and dew point trends before opening your windows * Avoid rain, strong wind, and humid outdoor air * Get alerts when the recommendation changes * Check your status with iPhone widgets and Apple Watch Set your preferred outdoor temperature range, maximum dew point, and wind limits to tailor the guidance. OpenAir uses outdoor conditions only. It does not measure indoor temperature, indoor humidity, or air quality. Alerts and background updates are best-effort and may be delayed by iOS.

Coolhouse — should you open the windows? During hot weather, the right move isn't always obvious: opening at the wrong time heats your home up. Coolhouse tells you whether to open or close your windows right now — and when — to keep the inside cool, without air conditioning. The app compares your city's outdoor temperature with your indoor temperature in real time, and applies rules drawn from scientific studies. Nothing is made up. What Coolhouse does: • A clear verdict at a glance: OPEN, CLOSE or airing possible • The right window to ventilate, hour by hour • Tropical night warning (overnight low ≥ 20 °C / 68 °F) • Estimated indoor temperature, adjustable to how it actually feels • Next action to plan ahead (“remember to close before noon”) • Automatic location or manual city search — your last place is remembered Science-based advice: Every rule is sourced and viewable in the app — including the WHO and building thermal-comfort standards (EN 16798-1, ASHRAE 55, CIBSE). Your privacy: No account, no ads. Your location is used only to fetch local weather and is never shared. — Thermal-comfort guidance, not medical advice. In an emergency, call your local emergency number.