Ventilate: When to Open

Hot apartment. No air conditioning. Every hour feels like a gamble. Do you open the windows and pull in warm air, or shut them and trap yesterday's heat? Ventilate is a heatwave companion for your home. It reads local weather and your indoor temperature, maps each window to the sun and the street, then tells you whether to close, crack open, open wide, or aim a fan. One clear answer per window, updated as the day shifts. WHAT YOU GET FOR FREE • Window-by-window advice that follows the forecast, not a fixed schedule • Close, open, and fan guidance tuned to your building and layout • Indoor and outdoor temperature history over 24 hours, 7 days, or 30 days • See how today compares with yesterday on your dashboard • Fan placement tips for single-sided and cross-ventilation homes • Gentle notifications before the next recommended change • Heat toolkit with practical guides for hot nights and heatwaves • Home screen widget and app shortcuts, so you can check advice without opening the app QUICK SETUP Aim your phone at each window once so Ventilate knows which way it faces. Add your indoor temperature when you can. A cheap thermometer helps, but you can start without one. VENTILATE PRO (OPTIONAL) Unlock outdoor air quality, pollen, UV index, and humidity on your dashboard. Pro feeds those signals into smarter advice, so you know when cooler air outside is worth letting in, and when it is not. Pro also unlocks 24-hour forecast curves for window advice and outdoor conditions. Window advice, history, widget, and toolkit stay free. Subscriptions are billed through Google Play. Payment is charged to your Google Play account at confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Google Play → Payments & subscriptions. Terms of Use: https://getventilate.app/terms Privacy Policy: https://getventilate.app/privacy