You'll get a wallet automatically. Satsume creates an embedded wallet for your account on signup (powered by Privy in production). No seed phrases, no extensions to install. You can export your private key any time from Account → Wallet to take full self-custody, or link an existing MetaMask / Coinbase Wallet alongside it.
Prototype mode. Accounts + wallet keys are stored in your browser's local storage — no server, no encryption. Clearing browser data will erase the account.