Split a bill and tip fairly — choose a percentage or a custom tip, share between friends, and see per-person totals.
Custom tip: enter a % (e.g. 12.5) or type a fixed amount in the Tip box in the form of £5 or 5. Tips in the UK are discretionary — many restaurants add a 10–12.5% service charge, so check the bill first. Round-up helps when you're paying in cash.