Hygrometer app is vintage relative humidity meter that measures atmospheric relative humidity. It features direct reading in percent and also includes a digital display readout containing a dew point temperature calculation for the current weather conditions. NOTE: This app requires device with a humidity sensor. If the humidity sensor is not present this app will load measured relative humidity by your local meteorological station using your location and a weather web service. Outdoor humidity information is provided by the Meteorologisk institutt of Norway NRK weather web service accessible at YR.NO Optional altitude information is provided by Open-Elevation web service accessible at open-elevation.com