Yes — completely free, no sign-up, unlimited calculations.
Set "Split between" to the number of people — each person’s share updates instantly, tip included.
USD, EUR, GBP, INR, BDT and PKR are built in — the symbol shows on every figure.
It varies by country — 10–15% is common in many places, 18–20% in the US. The quick buttons cover the usual choices.
No. All math happens in your browser; nothing leaves your device.