Usually because of haze, or because rain is expected before your laundry would dry. Malaysian afternoons often turn quickly. The reason is shown under the verdict.

Under a roof, a porch or a covered balcony, rain only reaches your clothes when the wind blows it in from the open side. Jemur checks wind direction and gusts hour by hour. Drying in the open, like a yard or rooftop? Choose "Open to the sky" and any rain counts. If you are not sure which way it faces, Jemur assumes the worst.

No. Where community sensors are within about 15 km, Jemur goes by their PM2.5 (AirGradient's public network). Where none are, Google's air quality data (a blend of official stations, sensors, models and satellites) and sensors further away can warn of haze, but never on their own call it low. Near an airport it also reads the airport's haze report and visibility. Where nothing measures haze, Jemur says so instead of calling it low. Jemur shows haze as Low, Hazy or Heavy haze, never as "API". Check the official reading for your area too. Wondering why another app shows a bigger number? See why apps disagree about haze. All official readings are on APIMS by the Department of Environment.

Jemur uses good forecasts, but tropical storms are hard to predict and forecasts can be wrong. Use it as a helpful guide, not a guarantee. Telling Jemur whether your laundry dried helps us improve it.

No. There is no sign-up and no login. Your settings stay on your phone.

A morning verdict at the time you choose, and an "Angkat baju!" alert when rain is coming while your laundry is out. You can turn notifications off at any time.