Users can use one extension/wallet, and a single Substrate account to interact with the Substrate runtime, contracts in EVM, and wasm contracts or a hybrid of these. If a user wants to use a particular Ethereum address, then simply link it with his/her Substrate address (basically proving the user owns both addresses), thereafter the user can just use the Substrate account with Polkadot{js} extension or alike to sign any Ethereum transactions seamlessly.
This allows users to use all functionalities within Acala and cross-chain capabilities without managing multiple accounts or wallets.
{% content-ref url="../../../build/development-guide/smart-contracts/get-started-evm/evm-account.md" %} evm-account.md {% endcontent-ref %}