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.
Settings: Celsius or Fahrenheit Outdoor range: -15 to 40 Celsius (5 to 104 Fahrenheit) Indoor range: 12 to 34 Celsius (54 to 93 Fahrenheit)