X has two switches that do different jobs: one keeps a location label off your new posts, the other stops the app reading your precise position at all. A third button, next to the first, deletes the location information already attached to your past posts. X still receives your IP address whenever you use it, and sets your account's country from it.
Do they get told?X is not a person-to-person location share, so there is nobody for it to notify, and X does not document a notice to anyone when you turn these settings off. What X does document is that when you access X it receives information about your location, such as your IP address, and uses that information to set your account's country, with the country or region shown under About this Account inferred only from your aggregated IP addresses. X also warns that deleting location information does not guarantee removal from copies held by third-party applications or in external search results, and does not cover locations shared through Direct Messages.
Do they get told?There is nobody for X to notify, and it does not document a notice when you uncheck the box. X documents what the setting controls: your selected location label is displayed underneath the text of the post, and once you post with a location your next post automatically includes a general location label.
Who can still see you
Off
Location labels on your future posts
New posts stop carrying a location label, and the in-app camera stops attaching coordinates that X says are findable via its API.
Still on
Past posts and X's other location uses
Labels already on older posts stay until you delete them, and Precise location is a separate switch on its own screen.
Still visible
X, from your IP address
X says it receives information about your location, such as your IP address, whenever you access it.
X prints this path in its desktop instructions, where step one is the more icon on the left nav menu; the setting belongs to your account, so it applies to the iOS app too.
Do they get told?There is nobody for X to notify, and it does not document a notice when precise location goes off. X documents what the setting does: enabling it allows X to collect, store, and use your precise location, such as GPS information, and shows your followers the location you are posting from if you geotag a post.
Who can still see you
Off
X's access to your GPS position
X stops collecting the precise location it describes as GPS information for your account on this phone.
Still on
Post location labels, and other apps
Add location information to your Posts is a separate box, and every other app keeps its own permission.
Still visible
X, from your IP address
X says it receives information about your location, such as your IP address, whenever you access it.
X's page says precise location needs two switches: the app's permission at the device level and this one at the account level.
Do they get told?What anyone else sees when the X app's own access is set to Never is not documented on Apple's Location Services page. What X documents is that precise location through its apps needs both this device-level permission and the Precise location switch inside the app.
Who can still see you
Off
The X app on this iPhone
X can no longer read your position on this phone, so it has nothing to attach to a post from it.
Still on
X on your other devices, and every app
This is one app's permission on one phone. Your account settings and every other app's permission are unchanged.
Still visible
X, from your IP address
X says it receives your IP address when you access it and uses location information to set your account's country.
X's own page still prints this route with the older menu name, Settings › Privacy › Location Services; Apple's current page prints Privacy & Security.
Do they get told?There is nobody for X to notify, and it does not document a notice when you delete this data. X documents the limits instead: deleting location information does not guarantee the information will be removed from all copies of the data on third-party applications or in external search results, and the setting will not remove locations shared through Direct Messages.
Who can still see you
Off
Location labels on your past posts
The location information attached to your posts stops displaying on X, in one action for all of them.
Still on
Copies elsewhere, and DM locations
X says copies on third-party applications or in external search results, and locations sent in Direct Messages, are not covered.
Still visible
The posts themselves
A landmark, a caption or a photo can still place you after the label is gone, and old copies of a post may still hold it.
This button sits with the post location box, so deleting the history and turning the setting off are two separate actions on one screen.
Do they get told?There is nobody for X to notify, and it does not document a notice when this slider goes off. X documents what it uses: trends are tailored for you based on who you follow, your interests, and your location, and with the feature disabled you can pick an Explore location yourself.
Who can still see you
Off
Trends tailored to where you are
X stops using your current location to pick your trends; you choose an Explore location instead.
Still on
Post location and X's other uses
This is one personalisation switch. Post location, Precise location and Personalization and data are separate.
Still visible
X, from your IP address
X says it receives your IP address when you access it and uses location information to set your account's country.
X's wider personalisation controls sit on their own screen at Settings and privacy › Privacy and safety › Personalization and data.
Do they get told?There is nobody for X to notify, and it does not document a notice when you uncheck the box. X documents what the setting controls: your selected location label is displayed underneath the text of the post, and once you post with a location your next post automatically includes a general location label.
Who can still see you
Off
Location labels on your future posts
New posts stop carrying a location label, and the in-app camera stops attaching coordinates that X says are findable via its API.
Still on
Past posts and X's other location uses
Labels already on older posts stay until you delete them, and Precise location is a separate switch on its own screen.
Still visible
X, from your IP address
X says it receives information about your location, such as your IP address, whenever you access it.
X prints this path in its desktop instructions, where step one is the more icon on the left nav menu; the setting belongs to your account, so it applies to the Android app too.
Do they get told?There is nobody for X to notify, and it does not document a notice when precise location goes off. X documents what the setting does: enabling it allows X to collect, store, and use your precise location, such as GPS information, and shows your followers the location you are posting from if you geotag a post.
Who can still see you
Off
X's access to your GPS position
X stops collecting the precise location it describes as GPS information for your account on this phone.
Still on
Post location labels, and other apps
Add location information to your Posts is a separate box, and every other app keeps its own permission.
Still visible
X, from your IP address
X says it receives information about your location, such as your IP address, whenever you access it.
X's page says precise location needs two switches: the app's permission at the device level and this one at the account level.
Do they get told?What anyone else sees when the X app's location permission is set to Don't allow is not documented on Google's app-permissions page. What X documents is that precise location through its apps needs both this device-level permission and the Precise location switch inside the app.
Who can still see you
Off
The X app on this phone
X can no longer read your position on this phone, so it has nothing to attach to a post from it.
Still on
X on your other devices, and every app
This is one app's permission on one phone. Your account settings and every other app's permission are unchanged.
Still visible
X, from your IP address
X says it receives your IP address when you access it and uses location information to set your account's country.
Google notes some of these steps work only on Android 11 and up on Pixel phones; X's own page routes to the same switch through Settings › Apps › X › Permissions.
Do they get told?There is nobody for X to notify, and it does not document a notice when you delete this data. X documents the limits instead: deleting location information does not guarantee the information will be removed from all copies of the data on third-party applications or in external search results, and the setting will not remove locations shared through Direct Messages.
Who can still see you
Off
Location labels on your past posts
The location information attached to your posts stops displaying on X, in one action for all of them.
Still on
Copies elsewhere, and DM locations
X says copies on third-party applications or in external search results, and locations sent in Direct Messages, are not covered.
Still visible
The posts themselves
A landmark, a caption or a photo can still place you after the label is gone, and old copies of a post may still hold it.
This button sits with the post location box, so deleting the history and turning the setting off are two separate actions on one screen.
Do they get told?There is nobody for X to notify, and it does not document a notice when this slider goes off. X documents what it uses: trends are tailored for you based on who you follow, your interests, and your location, and with the feature disabled you can pick an Explore location yourself.
Who can still see you
Off
Trends tailored to where you are
X stops using your current location to pick your trends; you choose an Explore location instead.
Still on
Post location and X's other uses
This is one personalisation switch. Post location, Precise location and Personalization and data are separate.
Still visible
X, from your IP address
X says it receives your IP address when you access it and uses location information to set your account's country.
X's wider personalisation controls sit on their own screen at Settings and privacy › Privacy and safety › Personalization and data.
Location spoofing, fake-GPS apps and mock-location settings are outside this site on purpose. This page describes the settings the app and your phone provide, and what the vendor documents about them.
If someone is tracking you against your will, turning a setting off may not be the safest first step. Read this first.