Various sensors are installed in the smartphone. In the meantime, I can say that there are 5 sensors that I can use for user analysis. And various smartphone applications for obtaining data through such sensors are disclosed.
It is possible to track the position of the user outdoors.
I am testing GNSS Logger smartphone app made by google.
2. Magnetometer Sensor
It is possible to track the location of the user in the room where GPS can not be used through the geomagnetic sensor.
3. Accelerator Sensor
Through this sensor, it is possible to measure at what speed the user is moving.
4. Gyro Sensor
Through this sensor, it is possible to analyze which direction the user is facing.
5. Light Sensor
You can measure the degree of light.