Real Time test on mobile device

Hi guys, I have a question - is there a way to test in real time my app on mobile phone or I have to run the command -> ionic run android every time I make a change?

ionic run is for running your app.
ionic prepare is for times that you change your resources.

but for transfering change to your phone you have to run build and copy output (apk to your android ) device and start that and debug.

oh, I got it now, ok I will give it a try. thank you karwan!