For iPhones/iPads running iOS 6, you can Limit Ad Tracking for apps by navigating to Settings > General > About > Advertising > Limit Ad Tracking and turning the feature on.
On iOS 7, the option is now also available at Settings > Privacy > Advertising. You can also manage the privacy settings for individual apps on iOS 6 or 7 by navigating to Settings > Privacy and selecting the type of data you would like to manage app settings for.
Google’s new Advertising ID for apps is available for devices running Android 2.3 or later. In Google Settings, select “Ads” and you will see your Advertising ID, which is used to deliver targeted ads on apps. On this screen you can select the option to reset your ad ID, which functions essentially like clearing your cookies in a browser. Additionally, tap the box labeled “Opt Out of interest-based ads” to opt out.
The Do-not-track feature is turned off by default. To turn it on, scroll and find the Settings application. Find and tap the Do Not Track item, under the Privacy & Security category. Tap the circle right of the Do Not Track label to enable or disable this feature.
Note that enabling DNT on the Firefox OS will send a signal to both the Firefox browser as well as individual apps that you do not wish to be tracked.
Firefox’s Do-not-track feature is turned off by default. To turn it on, scroll and find the Settings application. Find and tap the Do Not Track item, under the Privacy & Security category. Tap the circle right of the Do Not Track label to enable or disable this feature.
For Windows Phone 8: In the App list, tap Settings, flick left to Applications, tap Internet Explorer, and then tap Advanced Settings. Then select or clear the “Send a Do Not Track request to websites you visit” check box to enable or disable this feature.
For Windows Phone 7: In Internet Explorer, tap More > Settings. (You can also access Internet Explorer’s settings through Settings on the App list.) From there you can select or deselect “Allow Internet Explorer to collect my browsing history.”
There are two ways to turn on Do Not Track on iOS. On iOS 6 or 7, you can adjust Safari’s Do Not Track setting is in Settings > Safari > “Private Browsing.” (On iOS 7, the setting is simply labeled “Do Not Track.”) Enabling private browsing will also turn on Do Not Track.
iPhone running iOS 6
iPhone running iOS 7
In addition, you can also enable Do Not Track on iOS 7 through the Safari Browser itself: to do this, open Safari and tap the tabs icon on the lower right hand corner. Then tap the lower left hand corner marked “Private” to enable Private Browsing for that session. Doing so also enables Do Not Track.