Despite what Apple says about privacy (“What happens on your iPhone, stays on your iPhone”), ads most definitely track you on your iPhone and iPad. They also track you in every web browser, including Safari. False advertising from Apple regarding ads.
The Verge published a nice piece that shows how to limit some of that tracking. Emphasis on ‘limit’; this will not eliminate ads. Still, it’s good to do everything you can to minimize or eliminate all forms of intrusion.
To limit ad tracking on your IOS device:
Go into “Settings” on your iPhone/iPad
Select “Privacy”
Select “Advertisements”
Turn on the “Limit ad tracking”
To limit ad tracking in Safari:
Go into “Settings” on your iPhone/iPad
Find the section titled “Privacy & Security”
Turn on “Prevent Cross-Site Tracking”
Turn on the “Block All Cookies”
Block apps from phoning home when you aren’t using them:
Go into “Settings”
Select “General”
At the top, select “Background App Refresh”
From here you can allow apps to phone home via wifi, cellphone data or not at all.
Select the back button and make sure all apps are turned off.
Beyond all this, it’s better to use a VPN and Firefox, along with the Firefox addons: “Ghostery”, “https everywhere” and “Noscript Security Suite.” Regarding the “Noscript” add on, you can select it to allow scripts on pages you trust.
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