No passwords. Your data stays private to you.
When does your spending month start?
How do you pay? Add your cards and methods.
Frequent expenses? (optional)
Recurring monthly payments? (optional)
These are added automatically at the start of every billing period. You can set start dates and end them after a number of months later in Settings.
Changing this re-buckets which period past expenses fall into. It does not move any expense dates.