How can I set my ionic application for android only

Just purely out of curiosity, why do you want to make a desktop browser application look like it should be on a phone? Isn’t that just limiting to your application and the user experience? Why limit a desktop web app to the size of a phone?

I am doing one user study, which includes android mobile application GUI. So I will include this application into my survey webpage as iFrame, as suggested by @mhartington.

Users first will fill some basic survey question and then they can play with this application which looks like android mobile application. My purpose is collected user study data on my server thru this application.