I forget that 3D Touch exists because I own an iPad, which does not have it. After using the iPad for a while, I stopped trying to use 3D Touch on my phone, because I got conditioned to the idea that it isn't there.
That's funny because i got used to the force touch application switching gesture of swiping from the left side. When I got handed an ipad, I found myself making the gesture and then remembering that I need the double press on the home button.
If you didn't know a four finger swipe will switch apps on the iPad.
But it's a somewhat unnatural gesture to make. I often find I have to repeat it a couple of times until it works. Ditto for the five-finger pinch.