A photo can carry the place it was taken in three copies at once: the one you send, the original in your library, and every new photo the camera takes. Apple and Google document a different switch for each. Turning one off leaves the other two as they were.
Do they get told?Apple documents that people you share a photo with may be able to access its location metadata and learn where it was taken, and it prints separate steps for leaving location out of a share and for removing it from the photo in your library. Google documents that, apart from partner sharing, new albums, links and conversations you share do not include location details by default, and that in Google Photos you can only remove an estimated or manually added location, not one your camera wrote into the file.
Do they get told?Apple documents that when photos with location metadata are shared, the people you share them with may be able to access it and learn where the photo was taken. With Location turned off in Options, Apple documents that Location Not Included is shown above the Options button. Apple documents removing the location from the photo in your library as a separate step.
Who can still see you
Off
The copy you send
The shared copy goes out without location metadata. Apple shows Location Not Included above the Options button once you turn Location off.
Still on
The original in your library
The photo in Photos keeps its location, and the Camera app keeps recording location on every new photo you take.
Still visible
What the picture shows
A street sign or a skyline places you without any data, and whoever you send it to can ask where it was taken.
Apple prints the same steps starting from the Camera app: open Camera, select the camera roll, then select the photos you want to share.
Do they get told?Apple documents this as removing location metadata from the photo in Photos. Apple's page does not address copies you have already shared or sent, each of which is a separate file. What it does say is that people you share a photo with may be able to access its location metadata and learn where it was taken.
Who can still see you
Off
This photo in your library
The location metadata comes off this photo, so anything you share from it afterwards carries none.
Still on
Your other photos and the Camera
Every other photo keeps the location it was taken with, and Camera keeps writing location into new ones.
Still visible
What the picture shows
A street sign or a skyline places you without any data, and copies you already sent are separate files this does not reach.
On a Mac, Apple prints Image > Location, then Hide Location or Revert to Original Location.
Do they get told?Apple documents this as stopping location metadata collection in Camera, which reaches photos you take from now on. Photos already in your library keep the location they were taken with; Apple documents removing that separately, one photo at a time, in Photos. Apple does not document a notification for changing an app's location access.
Who can still see you
Off
New photos from the Camera app
Camera can no longer read your position, so photos you take from now on carry no location metadata.
Still on
Photos already in your library
Every photo taken before this keeps its location, and every other app keeps its own location permission.
Still visible
What the picture shows
A street sign or a skyline places you without any data, and your carrier still places the phone by cell tower.
Do they get told?Google documents Don't allow as meaning the app cannot use the permission, even when you're using the app. Google does not document a notification for changing an app's permission. Photos already on the phone keep the location they were taken with, and Google documents that a location your camera added cannot be edited or removed in Google Photos.
Who can still see you
Off
New photos from the Camera app
The Camera app cannot use your device's location, so photos you take from now on carry no location metadata.
Still on
Photos already on the phone
Photos taken before this keep their location, and every other app keeps the location permission you gave it.
Still visible
What the picture shows
A street sign or a skyline places you without any data, and your carrier still places the phone by cell tower.
Google's camera app has its own switch as well: open your camera's settings and turn off Save location on a Google or Pixel phone, Location tags on Samsung, Store location data on OnePlus.
Do they get told?Google documents that you can only update or remove estimated locations, and that a location your camera added cannot be edited or removed in Google Photos. Google also documents that, apart from partner sharing, new albums, links and conversations you share do not include location details by default, and that estimated locations are not shared even when you choose to include location details. Google adds that people may still be able to guess the place from landmarks in the picture.
Who can still see you
Off
The location on that item
Google Photos drops an estimated or manually added location from the photo in your library.
Still on
Locations your camera wrote in
Google says a camera-added location cannot be edited or removed here; the camera's own switch is the one that stops it.
Still visible
What the picture shows
A street sign or a skyline places you without any data, whatever the file says.
Location estimates have their own switch: tap your profile photo, then Photos settings, then Privacy, then Location options, then Estimate missing locations.
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.