When you initially start signing up for Moneybox, you'll set up a password. Later on in the registration process, you'll be able to set up a 5 digit PIN number which will be used to log in to your account (as an alternative to using your email and password), and to authorise certain actions in the app, such as withdrawals.
When setting up your PIN you'll first need to enter your PIN number, then enter it again to confirm. Please avoid using consecutive or repetitive numbers (e.g. 12345 or 55555).
If you'd like to set up biometric authentication (e.g. Face ID or Touch ID), you'll be able to do so in the app once registration is complete in Settings > Security 👍