Echooo is a decentralized self-custodial MPC&AA smart contract wallet app that supports multi-signature and social recovery. The multi-signature mechanism ensures security while significantly reducing transaction costs through Echooo's unique AI-driven technology architecture, combined with the layer2 network. Echooo uses the 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 is also the easiest and most secure way to collect and view NFTs, earn cryptocurrency returns through staking or decentralized finance (DeFi), and access thousands of decentralized applications (dapps) in the blockchain.

Hybrid Wallet (EOA + AA Vault):
- EOA wallet with MPC protection for high-frequency transactions.
- AA Smart contract account vault for secure transactions through multi-signature and social recovery, supporting ERC-4337.

Security:
- Echooo is an algorithmically encrypted and cloud storage-based non-custodial wallet that eliminates the need for mnemonic phrases. You have complete control over your cryptocurrencies, digital assets, keys, and data.
- Multiple layers of security infrastructure, combining MPC, TEE (Trusted Execution Environment), and multi-signature infrastructure, ensuring impeccable asset security.
- Establishing an account recovery mechanism to eliminate single points of failure.

Multi-chain Support:
- Echooo currently supports mainstream public chains and their on-chain assets, including Bitcoin, Ethereum, zkSync Era, Polygon, Arbitrum, Optimism, BNB Chain, Tron, Meter, Scroll, and more, providing comprehensive asset management across chains.

Embedded AI Engine:
- Unique AI-driven technology architecture: Combined with layer2 networks like zkSync, it significantly reduces transaction costs for the Echooo wallet.
- Real-time risk detection: Immediate user notifications when risks are detected.
- Intelligent transaction router: Obtains liquidity from various DEX exchanges and can split a single transaction across multiple DEXs to ensure the best exchange rate when performing multi-token swap transactions.

Convenience:
- Supports multiple currency payments for gas fees, such as Tether (USDT), USD Coin (USDC), DAI.
- Stay updated on the latest market trends, including price movements of major cryptocurrencies, top tokens, trending assets, and engage in trading operations such as purchasing, staking, and exchanging to earn additional returns.
- Continuously optimize account abstraction using the ERC-4337 standard.
- Provide the best exchange channels for leading and local providers.