To set up an auto clicker on an iPhone or iPad: open up the Settings app and go into the general section. then into the accessibility options. Now scroll down to the bottom of the page and press on accessibility shortcut.
How do I set up auto click on my iPhone?
Turn on Auto Tap at Settings > Accessibility > Switch Control > Tap Behavior > Auto Tap. After you turn on Auto Tap, you can select an item and wait for the Auto Tap interval to finish.