A forecast tells you the weather. CloudCrown tells you when your own conditions are actually met — and shows the measurements behind every answer.
Set your own thresholds for temperature, rain, wind, UV, air quality and pollen. Nothing is assumed on your behalf.
Pick an activity, a place and a date range. CloudCrown returns actual intervals — not a vague daily summary.
Open any window to see which requirements passed, which failed, and exactly what each preference contributed.
Save a window as a plan. If the forecast it relied on shifts, CloudCrown compares snapshots and asks you to decide.
A missing measurement shows as Unknown, never as zero — and a window that depends on it is never called a best match.
Record how an activity actually felt. After ten reviews, CloudCrown surfaces the hours and places that really work for you.
Works without an account. Everything is stored on your device and every feature is available signed out. An account only adds synchronisation across your devices, and you can delete it from inside the app at any time.
Weather, air-quality and pollen data come from Open-Meteo (CC BY 4.0). Every value in the app shows its source, when it was updated, and how confident it is.
Not medical guidance. CloudCrown does not provide medical, health or safety advice. All thresholds are entered by you, and the optional starting values are general — not clinical limits.