Why do I need a passcode as well as a password?

With the latest Zumo App upgrade, you now have access to two different wallets within your Zumo App: Zumo Infinite (which is your existing non-custodial wallet) and Zumo Trade, a new custodial wallet that allows you to trade without blockchain network fees. From now on, your passcode/biometrics is what you will use to log in to your Zumo app, while your existing password is what you will use to access your Zumo Infinite non-custodial wallet within the app.