Mold & Humidity Risk

Stop mould before it starts. Get a mould-risk score, your dew point, and a clear answer to "should I open the window right now?"

Damp, condensation and black mould all start the same way — air holding too much moisture. Mold & Humidity Risk turns that invisible problem into a number you can act on: a clear mould-risk score, your indoor and outdoor humidity, your dew point, and practical advice for every room in your home.

The home screen shows a mould-risk dial driven by humidity and dew point, plus how much of the last 24 hours has sat in the damp danger zone.

WHAT YOU GET

• Mould-risk score & dew point — a single risk dial from Low to Severe, with outdoor humidity, temperature and dew point, and a dust-mite comfort read. • Indoor reading — enter the temperature and humidity from a room thermometer/hygrometer for a personalised result, because indoor air is what actually drives mould. • Per-room log & tips — track bathrooms, basements, bedrooms and other hotspots one by one, each with tailored advice from "healthy" to "severe." • Ventilation window advisor — the Guide compares the moisture in your indoor air against outdoor air and tells you plainly: open up, little to gain, or keep closed — so you only air out when it actually dries the room. • Condensation calculator — enter the temperature of a cold surface (a window pane, a wall corner, a pipe) and see whether water will condense on it given your indoor air, with advice to stop it. • Burst-airing (Stosslüften) guidance for fast, effective ventilation without chilling your walls.

WHO IT'S FOR

Renters and homeowners fighting damp or black mould, people with humid bathrooms, basements or poorly insulated walls, allergy and asthma sufferers, dust-mite-sensitive sleepers, and anyone who wants to ventilate their home the smart way.

HOW IT WORKS

Outdoor humidity and dew point come from the Open-Meteo model for your area; indoor values are the readings you enter. Everything you log stays on your device.

A NOTE ON ACCURACY

Outdoor humidity and dew point are model estimates for your area, not a sensor reading in your room. This app gives guidance, not a guarantee against mould.