This is a 3D HD digital environment(temperature and humidity) tracking free app. It is a humidity meter (barometer) that can track environmental conditions for up to 8 hours. It uses these sensors: Ambient temperature sensor (Thermometer) Humidity sensor These type of sensors are on devices such as the: Samsung Galaxy S5 Samsung Galaxy S4 Samsung Galaxy Note 3 For other phones without these sensors, the environmental conditions are extrapolated using other basic sensors in the device. Settin