SproutFi is a family portfolio product built on Robinhood Chain. A parent creates a separate on-chain vault for a child, chooses a supported mix of tokenized stocks, and can fund it through direct contributions, recurring plans, family gift links and earned allowances. The vault records the parent, beneficiary, asset mix and a fixed graduation date on-chain. Before that date, the parent can guide the setup but cannot simply withdraw the portfolio. At graduation, the beneficiary receives direct control. The aim is to make long-term ownership something a family can build into ordinary moments, rather than another trading screen.