This is a submission for the OpenClaw Challenge . What I Built Finn is a personal finance assistant that lives entirely in WhatsApp. No app to install, no dashboard to remember to open — you just message Finn the way you'd message a friend. The problem Finn solves is a real one: most personal finance tools require you to change your habits (log into an app, categorize manually, remember later). Finn fits into a habit you already have — checking WhatsApp. What it can do: 📝 Log expenses and income via text or voice note (Whisper transcription) 📄 Parse credit card PDF invoices — send the PDF, review the itemized list, confirm, saved 🏦 Parse bank account statement PDFs — transactions extracted via a saldo-diff algorithm that works around garbled PDF text 🔍 Query spending — by period, category, card, or cost center (cross-source: credit cards + bank account + manual entries combined) ✏️ Edit or delete any saved record by just describing it 🔒 Phone whitelist — only your number gets a response Demo All four…