App Tracking Protection for Android is a free feature from the privacy-focused company that blocks third-party trackers within apps, even when said apps aren’t actively being used. When enabled in DuckDuckGo’s browser, it detects when apps are about to send data to a list of third-party tracking companies on DuckDuckGo’s publicly available blocklist and then blocks most of those data requests. It all happens on the device, without routing your data through DuckDuckGo’s servers.