In spatial aspect, people in different places may employ various Apps for their purposes. A person at home may want to open an entertainment App for leisure, while if she is the the office, a professional App regarding her work may be used.
In our collected data, although we have the detailed GPS information, the divisions of locations is difficult by GPS coordinates.
Instead, we identify one location by using the cell ID indicated by cell id entry.
On the one hand, they are easy for processing.