1Blocker

1Blocker is a privacy-focused content blocker for Apple's Safari browser on iOS, iPadOS, and macOS. It blocks ads, trackers, and other unwanted resources by applying a set of rules to every loaded page. The app relies on Safari’s content blocker extension, which runs in a separate process and enforces blocking before a page renders, contributing to faster page loads and reduced data usage.

A core feature of 1Blocker is its rule-based system. Users can enable prebuilt rule lists organized into categories such as ads, trackers, and social widgets, while also creating custom rules to block specific domains, URLs, or page elements. The app supports per-site exceptions and whitelisting, enabling fine-grained control. For power users, there is a rule editor and options to import, export, or share custom rule sets within the community. The rule format emphasizes portability, allowing users to apply preferred configurations across devices and updates.

Platform support covers devices running Safari on iPhone, iPad, and Mac, with some configurations offering syncing of rule sets across devices. The product is typically offered in a freemium model, providing a basic set of blockers for free with optional paid upgrades for additional features or rule sets.

Reception has noted the program’s user-friendly interface and flexibility relative to other blockers, though some sites may require whitelisting or manual rule adjustments to maintain full functionality. Critics often point to the balance between blocking effectiveness and site compatibility as a consideration for users.

See also: content blocker, ad blocker, privacy tools.