We are sorry to see you go!
To close your account in the app, Click Account tab > App settings > (Scroll down) Close Account.
This will liquidate (sell) your entire portfolio and withdraw all of your funds back to your bank account. It generally takes 1-2 business days to liquidate and another few business days for your funds to settle and be transferred to your bank. Other regulatory compliance policies such as Anti-money laundering (AML) holding periods, could further extend the withdrawal periods.