Blocking Trackers on Android Without Root

I used to think that because I wasn't clicking on sketchy ads, I was doing okay on the privacy front. Then I installed a tracker monitor and realized my "simple" flashlight app was trying to talk to servers in three different countries every time I turned it on. It's frustrating how much happens behind the scenes. The good news is that you don't have to "root" your phone—which is a technical nightmare that breaks things like banking apps—to put a stop to this. We can build a pretty solid wall around our data using tools that stay within Android's normal rules.

DNS-based blocking

The easiest first step is using a filtering DNS. I talk to a lot of people who get overwhelmed by privacy apps, and I always tell them to start here because it requires zero battery life and zero background app maintenance. When your phone tries to connect to a known tracker like graph.facebook.com, a filtering DNS just says "I don't know where that is," and the connection dies before any data is sent.

I personally use NextDNS for this. It's a service where you can toggle "EasyPrivacy" or "AdGuard DNS Filter" lists on a website, and it pushes those rules to your phone via the Private DNS setting in your Android menus. The benefit here is that it's "system-wide." Whether you're in Chrome, a random game, or your news app, the trackers are getting blocked. I remember checking my logs after a week and seeing that NextDNS had blocked over 4,000 queries from just 20 apps. That's 4,000 times my phone didn't have to wake up the radio to send my data away.

Local VPN blockers

If you want more control, you can use what's called a "Local VPN" blocker. Apps like NetGuard or RethinkDNS create a VPN tunnel that never actually leaves your phone. Instead of sending your data to a remote server, it acts like a filter right on the device. This is where you get the "big guns" of privacy control.

With NetGuard, for example, I can tell my phone: "This calculator app is never allowed to touch the internet." It’s incredibly satisfying. You pull up a list of all your apps and just tap a little Wi-Fi or Signal icon to cut them off. There’s a slight learning curve, and because it uses the VPN slot in Android, you can't usually use a "real" VPN (like Mullvad or Proton) at the same time unless you use an app like RethinkDNS which tries to handle both. It does use a tiny bit of battery, but for apps that have no business being online, it's the ultimate "mute" button.

Browser-level blocking

Browsers are the biggest hole in most people's privacy. Chrome is the default, and while it's fast, it's built by an advertising company. I eventually switched to Firefox or Mull (a hardened version of Firefox) on my phone. Why? Because they allow real browser extensions like uBlock Origin.

When you use uBlock Origin on Android, the mobile web feels like a different planet. Pages load faster because you aren't downloading 2MB of tracking scripts just to read a 500-word article. If you prefer the speed of Chrome's engine, Brave or Vivaldi are great alternatives that have blocking built-in. I’ve found that using a browser with aggressive "Fingerprinting" protection makes it much harder for sites to track me across the web even when I'm not logged in. Just be prepared: some very old websites might look a bit "broken" when you block all their scripts, but a quick refresh usually fixes it.

App-level controls

Android has gotten a lot better about permissions in versions 13 and 14, but we still tend to give apps more than they need. Once a month, I like to go to Settings > Privacy > Permission manager. It's a bit tedious, but it's eye-opening. Do you really need that shopping app to have "Nearby Devices" or "Sensors" permission?

The big one is "Location." I always set my apps to "Only while using the app." For things like weather, you can often just type in a zip code instead of giving them your precise GPS coordinates. Another "secret" setting is the Android Advertising ID. You can find this under Settings > Privacy > Ads. I always hit "Delete advertising ID." This doesn't stop ads, but it prevents apps from using a unique "fingerprint" to link your activity in the game you play to the things you search for in your browser. It effectively resets your profile to zero.

Samsung's built-in tracker blocker

If you're on a Galaxy device, Samsung actually has some decent tools hidden in their "Device Care" and "Samsung Internet" settings. In the Samsung Internet browser, there's a "Privacy Dashboard" that shows you which sites are trying to track you. They have a feature called "Smart Anti-Tracking" which uses on-device machine learning to identify and strip out tracking cookies.

There's also a menu called "Security and Privacy" in the main Samsung settings. One thing I actually find useful there is the "Auto Blocker" (introduced in One UI 6). It prevents apps from being installed from unauthorized sources and blocks malicious commands being sent via USB. It's a bit "nanny-state," but for a non-technical friend, it’s a great layer of protection that doesn't require installing third-party apps. I keep it on for my parents' phones because it genuinely stops a lot of the "accidental" malware that comes from sketchy browser redirects.

A no-root tracker-blocking stack

So, what does a "complete" setup look like? If I were setting up a friend's phone today, here is the exact stack I'd use. It’s what I use on my own device, and it stays out of the way for 99% of tasks.

• The Foundation: Set Private DNS to dns.adguard-dns.com. This handles the easy stuff system-wide.
• The Browser: Use Firefox with the uBlock Origin extension. This is your primary window to the web.
• The Cleaner: Go to Settings > Privacy > Ads and delete the Advertising ID.
• The Policy: Only grant "Approximate" location unless it’s a maps app.

The only caveat? This setup won't stop Google or Samsung themselves from knowing what you're doing with their system apps. To truly escape that, you'd need a custom ROM like GrapheneOS, but for most of us, this "stack" cuts out about 90% of the junk. It makes the phone feel faster, the battery lasts a little longer, and your private conversations don't suddenly turn into "recommended products" on your social feed an hour later.