Manage automatic ETA sharing in Maps
In Maps on iPhone and iPad (Wi-Fi + Cellular models), you’re able to automatically share your estimated time of arrival (ETA) to a Favourite location with anyone in your Contacts. After you set this up, each time you navigate to the Favourite location, your ETA is shared with the contacts. After you’re on your route, the bottom of the screen indicates you’re sharing ETA with other people.
Find out how: To view a task below, select the plus button 
next to its title.
Manage ETA sharing on your iPhone and iPad
In the Maps app
on your iPhone or iPad (Wi-Fi + Cellular models), tap your profile icon to the right of the search bar.Select Favourites to open a window containing all the locations you’ve designated as a Favourite.
Tap the Info button
next to the Favourite point of interest.Scroll down to the Share ETA section to review who you’re automatically sharing your ETA with.
To remove someone, tap the Remove button beside the name of the person you want to remove.
To add someone, tap Add Person, then select the person from your Contacts you want to automatically share your ETA with for this point of interest.
Repeat steps 3–6 for all additional points of interest in your Favourites.
Stop automatic ETA sharing after navigating has started
You can stop automatic ETA sharing even after you begin navigating to a Favourite location. If you stop sharing your ETA using this method, the person has already received a notification on their device informing them that you’re navigating to the Favourite location you selected; however, they’re no longer able to access your ETA or route information.
Important: This method doesn’t permanently remove automatic sharing with that person. The next time you navigate to this same Favourite location, automatic ETA sharing begins again. To prevent this, you must remove the contact from Share ETA in the Favourite location.
In the Maps app
on your iPhone or iPad (Wi-Fi + Cellular), tap “Sharing with [Name of Contact]” at the bottom of the screen.Identify the person on the list you no longer want to share your ETA with.
Select “Tap to stop”, located under that person’s name.