zEt/n;h-b
Open-Source Personal Finance Platform for Up Bank
A personal finance app for Up Bank that turns raw transactions into merchant-level spending breakdowns, category analytics, and drag-and-drop budgeting for individuals and couples.
Up Bank is an Australian neobank with a developer-friendly API and real-time webhook system for transaction events.
Solo developer. Designed, built, and deployed everything.
ARCHITECTURE
HIGHLIGHTS
Click into any merchant and see full transaction history, total spend, average purchase size, and frequency. Category views group merchants with trend charts
Each partner gets their own budget view plus a combined household view. Expense splitting works per category -- rent can be 60/40 while groceries are 50/50
Tap your card and the purchase shows up in seconds. HMAC-SHA256 verification, balance updates for both partners, and async AI categorization
Ask it how much you spent on groceries last month and it queries the database directly. Supports Claude, GPT-4o, and Gemini, switchable in settings