VAULT is a browser-based personal banking simulator. You can open multiple accounts, each represented as a tab at the top of the screen. Once inside an account, you can deposit funds to increase your balance or withdraw funds to decrease it. Every transaction is recorded in a scrollable history log so you can track all deposits and withdrawals at a glance. Balances update in real time and turn red when an account goes negative. No data is stored permanently — everything resets when the page is refreshed, making it a safe sandbox for learning how basic banking operations work.