Samsung Galaxy S4 features certain sensors including temperature, humidity, barometer, and RGB Light Sensors. You can check ambient temperature, pressure and humidity level of your surrounding environment as well as measure RGB and white intensity of a light source. Unfortunately, Galaxy S4 does not have an easy solution to use these sensors.
There are several third party apps available at Play Store to fully utilize Galaxy S4 sensors, for instance the free app “Galaxy S4 Sensors” lets you easily measure ambient air temperature, Illuminance, ambient air pressure, and ambient relative humidity.
The app Galaxy S4 Sensors has a minimal design and shows data from S4’s four sensors – temperature, humidity, barometer, and RGB Light Sensors – in a cool background. Interested Galaxy S4 users can download the app free from Play Store.
Galaxy S4 users can install the app free from Play Store