How to create network fluctuation env in mobile device to test an application

I am testing a mobile app. I want to check the application behavior with network fluctuation condition. Do anyone knows any another application or way so I can achieve my task.

I have tried to search but some required root device etc. I need a clean solution which can be achieved without rooting the device

I have look into app like:-

http://ift.tt/2xQx2fk