iOS defaults to asking for TouchID and passcode if more than 48 hours have elapsed since you last interacted with the phone, or if the phone has been power cycl

iOS defaults to asking for TouchID and passcode if more than 48 hours have elapsed since you last interacted with the phone, or if the phone has been power cycled. There's a certain point at which asking for TouchID and passcode too often will encourage people to use less secure pass codes, which defeats the point of having 2-factor authentication in the first place.