Google is finally rolling out their Lens feature on iOS following its release on Android last week. Lens can identify objects in photos, visually analyze them, and provide additional information about them as well as take complementary actions, such as mark an event to your phone’s calendar or even add a number to your contacts. The release will continue and be completed within the week.
— Google Photos (@googlephotos) March 19, 2018
To access the feature, first download the Google Photos app from the App Store. Then launch the app, and select the Google Lens icon. Point your camera to any subject, and Google will add info to the corresponding object.