We understand that some users are interested in importing block lists from other apps. However, this feature is not supported because the rule format used by most third-party filters is completely different from the one used by the native Safari content-blocking mechanism.

We do our best to deliver well-balanced and optimized filters tailored for the Safari content-blocking engine. While we convert filters on our end, this process involves thorough testing to ensure the rules integrate smoothly and work effectively within our app without affecting its performance.

If you'd like to suggest a new filter for 1Blocker, we are open to your feedback on this. You are always welcome to share your thoughts and ideas on how we can improve our filters further.