Mold & Humidity Risk
Dew Point & Damp Tracker
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Thanks for using our app! This update brings behind-the-scenes performance and stability improvements for a smoother, more reliable experience. Your support means the world to us.
The developer, heekyung moon, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- heekyung moon
- Size
- 55 MB
- Category
- Weather
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Contains
Advertising
- Copyright
- © 2026 Moon