If you have an iOS device, location-tracking settings are found under "privacy" in Settings.
Next, selection "Location Services" ...
... Where you'll find the location-data permissions for every app on your device.
Under each app, you can select the level of access to your location data you want to give. You can choose whether you want the app to always have access, even when the app isn't being used, if you only want to give it access while using the app, or if you never want the app to track your location. Some apps will provide an explanation for what they use your location for.
If you own an Android device, location tracking is under "Security & location" in Settings:
Under the Privacy section, select "Location" ...
... Then select "App-level permissions."
For Android, you can't toggle between options like on iOS devices. You can choose either to grant your apps permission to access your location, or take away their access altogether. But you can always turn location-sharing off and then re-enable it when you want to use your app, as a workaround.
