Dmitry, good afternoon. But how to practically install the application without access to the device?
		
		
	 
 Almost nothing !!! If a person is careful, attentive, never leaves his smartphone anywhere, then installing such a program is not possible. 
 In order to install such a program on a smartphone, you need to get the smartphone in your hands for a certain time (not five and not ten minutes), 
 to have time to install and configure the program. And in order to access your smartphone from a distance - this event requires other knowledge in 
 field of IT technology. And in order to take such a risk - it must be economically justified. The only option is such a program 
 it is possible to establish a minor child with the written consent of his parents.