What Is Unseen App Tracking?
When you're not actively using an app, it can still run in the background. This 'background activity' allows apps to check for messages, refresh content, or sync data. However, it also enables them to collect information about your behaviour, location,
and habits, often to build a detailed profile for targeted advertising. This data can be shared with or sold to data brokers without your direct knowledge. This tracking consumes battery and mobile data, but more importantly, it chips away at your privacy. The good news is that both Apple and Google provide tools to manage and block this activity.
The First Step: A Full Permissions Audit
Before diving into specific settings, conduct a permissions audit. Many apps request access to your location, microphone, camera, and contacts, even when they don't need it to function. Go through your phone's settings and review which apps have access to what. For an app that edits photos, does it really need your location? For a social media app, does it need access to your entire contact list? Be strict. If a permission isn't essential for the app's core purpose, turn it off. This is one of the most effective ways to immediately reduce your data footprint.
For iPhone Users: Embrace App Tracking Transparency
Apple gives its users a powerful tool called App Tracking Transparency (ATT). Since iOS 14.5, every app must ask for your permission before it can track your activity across other companies' apps and websites. If you've been tapping 'Allow' without thinking, it's time for a review. Go to 'Settings' > 'Privacy & Security' > 'Tracking'. Here, you can turn off the main 'Allow Apps to Request to Track' toggle. This single action prevents all new apps from even asking, and it revokes permission for any apps you previously allowed. You can also manage permissions on an app-by-app basis from this screen.
For Android Users: Delete Your Advertising ID
On Android, the key to stopping cross-app tracking is the Advertising ID. This is a unique code that allows advertisers to link your activity across different apps. By deleting it, you break that chain. To do this, go to 'Settings' > 'Privacy' > 'Ads'. From there, tap 'Delete advertising ID' and confirm. While you're there, explore the 'Privacy Sandbox' settings. This is Google's newer initiative to provide more privacy-focused advertising by grouping users into cohorts rather than tracking them individually. You can manage ad topics and app-suggested ad settings here for added control.
Limit Location Tracking for Good
Your location data is highly sensitive and valuable. Most apps that ask for it don't need it constantly. Both iOS and Android allow you to grant location access only 'While Using the App' or 'Ask Next Time'. Avoid granting 'Always' access unless absolutely necessary, for example, for a navigation app. For iPhone, head to 'Settings' > 'Privacy & Security' > 'Location Services'. On Android, it's 'Settings' > 'Location' > 'App permissions'. Review the list and demote every non-essential app to a more restrictive setting. For extra privacy, you can also turn off 'Precise Location' for apps that only need a general idea of where you are.
Opt Out of Personalized Ads System-Wide
Blocking trackers is one part of the puzzle; the other is opting out of ad personalization directly. This tells services not to use your data to tailor ads to you. On iPhone, go to 'Settings' > 'Privacy & Security' > 'Apple Advertising' and turn off 'Personalized Ads'. On Android, you already took the main step by deleting your Advertising ID, but you can also go to your Google Account's 'Ad settings' and turn off 'Ad Personalization' there to cover Google's wider network. You will still see ads, but they will be generic rather than based on a profile of your interests and behaviour.
