Some things are best left unknown

or private at least.

This article states “It’s easy to forget that convenience can also leak information about you to anyone who can touch your iPhone or iPad.”

Here are some of the tips the article offers

“Although Apple generally positions itself rightly as privacy conscious vis-a-vis the information about yourself that it allows itself and others to see, there’s no one-stop-shop for dialing up or down what appears on the lock screen. You have to visit several places in Settings: 

  • Touch ID & Passcode
  • Control Center
  • Notifications

Touch ID & Passcode allows access to major features, and all the options are enabled by default. You can turn them off under Allow Access When Locked:

  • Today View, the summary of what’s going on in your day plus widgets. (Some widgets show limited information while locked, such as Activity and Find My Friends.)
  • Notifications View, the swipe-down view that’s a swipe left from Today View, which reveals the history of notifications. You can keep notifications active and adjust how much information is displayed, however, as discussed below.
  • Siri, which won’t respond to everything, but does give away a lot. Disabling Siri in this fashion prevents the “Hey, Siri” option from working while locked.”