Two ways to split, one bill
A quick split takes one total and a number of people and gives you the per-person figure as you type — no Calculate button, no waiting. If everyone ordered something different, switch to splitting by item without starting again: the people, the tip and the service charge all carry over.
Shared dishes are the common case rather than an afterthought. Put a starter on three people and it divides three ways; give somebody two shares of the pizza and they pay double. Leaving one person off the wine takes a single tap.