Fix a category Spense got wrong.
Spense sorts your spending for you. When it guesses wrong, correcting it once teaches it that merchant for good.
Find the transaction
Open the Spending tab and find the transaction that landed in the wrong place. If it's not near the top, the Search box and the filter chips (date, Account, Category, amount) under the header will get you there.
Swipe right and tap the pencil
Drag the row to the right and a pencil button appears on its left edge. Tap it and the Edit Transaction dialog opens with the transaction's details. (Swiping the other way reveals delete — the red trash can.)
Pick the category you meant
Tap the Category field, pick the category you meant from the list, and hit Save Changes. The transaction moves, and your budget totals follow a moment later.
Curious why Spense groups every coffee shop under one category instead of one per merchant? That's part of how auto budgeting works.