Rainmaker, an account-abstraction-based mobile crypto wallet, simplifies DeFi investments by reducing the complex process to just a few taps. Leveraging Multi-Party Computation (MPC) and smart contracts, Rainmaker allows users to safely self-custody funds with a simple email login. Rainmaker's mission is to be the operating system for DeFi, providing an accessible and secure way for users to participate in the world of decentralized finance.