The in-app blocking tool protects your privacy by automatically preventing invisible trackers from connecting to third-party servers in the background. Many apps run such trackers to collect user data without your consent.
Trackers collect as much information about you as possible, which can then be sold to third-party companies or stored for future use. The information collected usually contains your personal data, such as your interests, location, etc.
How to activate in-app blocking:
Currently, this feature is available in the iOS version of 1Blocker because the necessary tools are supported by iOS only.
You can activate it from the app's Privacy tab > Block In-App Trackers.
1Blocker installs a local VPN profile to perform on-device security checks of all Internet connections other apps make. No traffic or data is sent to our servers. The in-app blocking filter stops outgoing network traffic to some domains using open-source domain lists maintained by the filter community. It operates at the network level, so you will stay protected no matter what app you use.
The in-app blocking filter prevents app trackers from even connecting to the Internet. Everything is done locally on your device only, making this tool a gateway between you and the Internet. When it sees a request being sent to a block-listed server, the extension just drops the connection. Other requests stay untouched and keep working as usual.
It offers two filtering modes: DNS Proxy and HTTP Proxy.
They can be accessed from the (...) menu located at the top-right of the filter. Both modes operate similarly, but they process data slightly differently.
We recommend using the DNS Proxy as it is considered more reliable and battery-efficient.
The HTTP mode might come in handy if you experience issues with apps you frequent while connecting via DNS Proxy and want these apps to be covered by the in-app tracking filter. Otherwise, feel free to create a shortcut automation rule to pause the filter while working with these apps: Shortcut Automation Rules.
Another section that you may find helpful is Recent Activity, which provides an overview of the tracking requests blocked by the in-app blocking filter.