Camera Shutter App?

[AnalogLudite]

I have a tremor, so it is very hard for me to take a steady picture without using both hands. Is there an app that will allow me to use the side power button as the shutter in camera mode, in stead of the spot on the screen, like a real camera? I don't need all kinds of filters or fancy editing, just to reassign a button function so I can squeeze it. Does such an app exist? I am using a Galaxy A02s with the most current version of Android.

[Tidbitty]

Open the camera app. Tap settings then look for shooting methods. You can use the volume buttons for a shutter button.