To use a variation of Google's Circle to Search feature on an iPhone, you can create a shortcut using the iOS Shortcuts app and the Google Lens app. Follow these steps to set it up:

  1. Open the Shortcuts app on your iPhone.
  2. Create a new shortcut or find the pre-made "Search your Screenshot" shortcut (if available).
  3. Configure the shortcut to take a screenshot and then use the "Search with Google Lens" action.
  4. Set the shortcut to the Action button on iPhone 15 Pro or use Back Tap or voice commands on older models.

Once the shortcut is set up, you can activate it to take a screenshot and automatically search the content using Google Lens. This feature allows you to select elements in an image or webpage and search for related information using Google.

To enable the shortcut using Back Tap on an iPhone:

  1. Open Settings on your iPhone.
  2. Go to Accessibility.
  3. Tap on Touch.
  4. Scroll down to Back Tap.
  5. Choose either double tap or triple tap.
  6. Scroll down to the Shortcuts area and select the "Search your Screenshot" shortcut.
  7. Tap back to apply the setting.

Remember to select 'Always Allow' when prompted to share the screenshot with Google Lens. This process is a workaround for the Circle to Search feature, which is not natively available on iPhones but can be emulated using iOS Shortcuts and Google Lens.