Families settle as one.
Add a family once. Weights per person — 1× adults, 0.5× kids, adjustable per expense — but one balance line and one payment per household. No more four separate transfers to settle one family's dinner share.
Currencies that never rewrite history.
Pick a settling currency for the trip. Every expense keeps its original amount and the exchange rate from the day it happened — visible, overridable, permanent. Your past expenses never silently change.
Settlement you can check.
Every suggested payment expands to show exactly which expenses produced it. Flip between the simplified plan and the raw who-owes-whom view anytime. Provably minimal plans — not a black box.