Cashew is a production-grade, cross-platform personal finance and budget tracking application built with Flutter/Dart. It manages transactions, multi-currency wallets, budgets with category-level spending limits, savings goals and loans, subscriptions, recurring/auto-pay rules, credit/debt tracking, and spending analytics (pie charts, line graphs, heatmaps, net worth summaries). It ships to Android (with home screen widgets), iOS, web (PWA), and desktop. Data persists locally in SQLite via the Drift ORM with 46 managed schema migrations, and synchronizes across devices through a custom Google Drive sync client, with shared-budget features on Firebase Auth/Firestore/Cloud Functions, plus optional Gmail and notification scanning for auto-generated transactions.