I know this topic has been discussed many times in the past. I really wanted to give an iPhone a try coming from an Android, but the navigation on the phone seems to be a huge downgrade.
The back button is in most applications out of reach with one hand. And swiping on the right edge is not user friendly for a right hander.
On android you can do that from both sides and it makes the overall experience much smoother!
Will apple ever catch up with android?
The first thing I disable on my android tablet is the bottom taskbar that contain back gesture, take up space and yet a simple swipe does the trick. Thankfully, Samsung tablet is support swipe to go back gesture