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 Favorite location with anyone in your Contacts. After you set this up, each time you navigate to the Favorite 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 or iPad
In the Maps app
on your iPhone or iPad (Wi-Fi + Cellular models), tap your profile icon to the right of the search field.Select Favorites to open a window containing all of the locations you’ve designated as a Favorite.
Tap
next to the Favorite point of interest.Scroll down to the Share ETA section to review the names of people you’re automatically sharing your ETA with.
To remove someone, tap Stop Sharing ETA beside the name of the person you want to remove.
To add someone, tap Add Person, then in the Contacts app, select the person 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 Favorites.
Stop automatic ETA sharing after navigating has started
You can stop automatic ETA sharing even after you begin navigating to a Favorite 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 Favorite 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 Favorite location, automatic ETA sharing begins again. To prevent this, you must remove the contact from Share ETA in the Favorite location.
In the Maps app
on your iPhone or iPad (Wi-Fi + Cellular), “Tap the 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.