Know exactly when to open your windows to reduce indoor humidity, improve air quality, and prevent mold – powered by real‑time weather data.
Download on the App Store
The app gives you real‑time relative and absolute humidity so you always know the moisture level in your environment.
Our algorithm analyses upcoming humidity trends and notifies you when opening windows will actually lower indoor moisture.
At a glance humidity & ventilation advice right on your iPhone homescreen – no need to open the app.
Humidity Window App combines trusted Apple Weather data with proven indoor air‑quality science to compute the dew point, absolute humidity, and mold‑risk index. Set your typical home hours and the app highlights the lowest‑humidity 2‑hour window so you can ventilate efficiently.
Yes – the full feature set is completely free with no ads.
No. We use accurate local weather data; optionally add your indoor readings for personalised advice.
Absolutely. The app adapts advice based on your region’s humidity patterns.