Every category's budget is added up for the total, and that total divided by the number of trip days gives the per-day figure — a quick sense check for whether the overall budget is realistic, even though one-off costs like flights don't actually repeat daily.
FAQ
Can I add my own categories?
Yes — use the "Add category" button to add as many extra rows as you need, alongside the common ones already included.
Does the per-day figure include one-off costs like flights?
It divides the whole total, including one-off costs, by the number of days — useful as a rough daily average, but flights and other one-off costs don't actually repeat each day of the trip.
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