Family Balance
A family savings tool combining multi-bank rates, compound-interest calculations, member tagging, cloud sync, and shareable reports.
What this project proves
AI agents support product planning, frontend and Supabase implementation, testing, and documentation; I own the ledger rules, interest logic, privacy boundaries, and acceptance decisions.
A shared tool used for a real household need; public portfolio evidence is deliberately limited to a sanitised product architecture with no names, banks, balances, credentials, or household records.
LedgerTransaction-first source of truth
RatesEffective-dated interest rules
CloudShared Supabase sync
Problem
Family savings span multiple banks and people, while interest rates change over time. A basic spreadsheet quickly becomes hard to trust and maintain.
Build
Use a transaction ledger as the source of truth, then add effective-dated rate rules, member tagging, Supabase sync, and shareable summaries.
Outcome
A complete tool shaped by a real household need and designed for shared use across family members.