On my phone, I prefer Emu48, with a 50g skin. It ends up being almost exactly the same scale as the real calculator, so my muscle memory from the 50g transfers

On my phone, I prefer Emu48, with a 50g skin. It ends up being almost exactly the same scale as the real calculator, so my muscle memory from the 50g transfers over about as well as possible give that it's on a touchscreen instead of a real keyboard. And the extra screen space over the 48 series sometimes comes in handy.