Echooo is a decentralized self-custodial smart contract wallet app that supports multisig and social recovery. The multisig mechanism ensures security while significantly reducing transaction costs through Echooo's unique AI-driven technology, combined with the zkSync layer2 network. Echooo uses ERC-4337 standard and continuously optimizes account abstraction, so as to deliver a better user experience and a seamless transition from Web2 to Web3 for more users. Echooo now fully supports EIP-6963 to make it more user friendly in even more DAPP scenarios.