PayOut is a dividend analysis dashboard for US stock investors. You enter your portfolio and it shows projected annual income, yield on cost, sector diversification, and dividend growth history.
The data layer pulls from a financial API and is cached aggressively to avoid hitting rate limits. The frontend uses React with Recharts for visualizations. It was launched on Product Hunt and got a decent initial response.
The main thing I learned from this project: financial data is messy. Splits, special dividends, suspended payments — there's always an edge case you didn't account for.