WalleK is a personal finance ledger. Through ChatGPT it can add an expense or income, look up what was spent over a period, break spending down by vendor or category, show account and card balances, list recurring bills and mark them paid, follow loan installments and salary records, and read an uploaded bank or card statement and turn it into ledger entries for the user to approve. It works in multiple currencies. Every write goes to the signed-in user's own ledger only.