It&#x27;s optional in iMessages, I believe it&#x27;s opt-in (not 100%, changed the setting a long time ago to have it on, personal preference).<p>That said, it was creepy when I realized the only reason it was enabled on my ex-girlfriend&#x27;s phone (she didn&#x27;t like it and is tech-illiterate) was that her <i>previous</i> boyfriend had enabled it to see if&#x2F;when she read his messages (creepy dude that&#x27;d send her flowers randomly two years after their break up, but she thought it was sweet and that they were &quot;just friends&quot;, yeah, sure).