Protect lists with Touch ID and a pin code
Lists containing confidential data can be protected with a pin code and with your fingerprint using Touch ID so that only you can access the details of the list. Tasks within protected lists are not shown in the filter area.
If your device supports Touch ID then you can easily open your protected lists with your fingerprint.
Protected list on a device without Touch ID
If your devices does not support Touch ID then you can protect your lists and todos with a 4-digit pin code.