Freshersworld Jobs Search Android App - Functionality ,Uses

I want to log out from fresher world. What is the procedure? Please tell about this.

Is there any option of job preferred location? If yes, then how can update or change it in profile?

Do you also send messages like we have partnered with ministry of labour and send us our email and password????? As I am getting messages in my inbox for the same just want to know if they are genuine or some spam????