{
  "slug": "1blocker",
  "category": "ad-blockers",
  "name": "1Blocker",
  "description": "Safari content blocker for iPhone, iPad, Mac and Vision Pro with filters for ads, trackers, annoyances and adult content, plus custom rules and an in-app tracker filter.",
  "website": "https://1blocker.com",
  "license": null,
  "platforms": [
    "macos",
    "ios"
  ],
  "jurisdiction": null,
  "pick": false,
  "pick_reason": null,
  "disclosure": null,
  "grade": "D",
  "score": 53,
  "coverage": 100,
  "summary": "1Blocker scores 53 out of 100 (grade D) on the ad and tracker blockers criteria. It meets 4 of 7 criteria: no trackers or telemetry, no ads or data sales, no browsing data collected and custom filters. It does not meet open source, independent audit and effective by default.",
  "url": "https://privacyratings.com/ad-blockers/1blocker/",
  "markdown": "https://privacyratings.com/ad-blockers/1blocker/index.md",
  "answers": {
    "open_source": {
      "title": "Open source",
      "weight": 3,
      "answer": "no",
      "evidence": null,
      "note": "Closed source."
    },
    "no_trackers": {
      "title": "No trackers or telemetry",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://1blocker.com/privacy",
      "note": "The app contains no analytics tracking code and does not track visited sites."
    },
    "no_ads": {
      "title": "No ads or data sales",
      "weight": 2,
      "answer": "yes",
      "evidence": "https://1blocker.com/privacy",
      "note": "Funded by Premium subscriptions and lifetime licenses. No data is collected or sold."
    },
    "independent_audit": {
      "title": "Independent audit",
      "weight": 2,
      "answer": "no",
      "evidence": null,
      "note": "No independent audit is published."
    },
    "transparency_report": {
      "title": "Transparency report",
      "weight": 2,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "user_notice": {
      "title": "Tells users about requests",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "tls": {
      "title": "TLS configuration",
      "weight": 2,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "security_headers": {
      "title": "Security headers",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "web_standards": {
      "title": "Modern web standards",
      "weight": 1,
      "answer": "n/a",
      "evidence": null,
      "note": "Only applies to hosted services with a website to test."
    },
    "blocks_by_default": {
      "title": "Effective by default",
      "weight": 3,
      "answer": "no",
      "evidence": "https://support.1blocker.com/en/articles/9311963-free-version-vs-1blocker-premium",
      "note": "The free version allows only one filter category at a time, so blocking ads and trackers together requires Premium."
    },
    "no_data_collection": {
      "title": "No browsing data collected",
      "weight": 3,
      "answer": "yes",
      "evidence": "https://1blocker.com/privacy",
      "note": "Filtering happens in Safari on the device, and the app does not collect browsing data."
    },
    "custom_filters": {
      "title": "Custom filters",
      "weight": 1,
      "answer": "yes",
      "evidence": "https://support.1blocker.com/en/articles/9312016-custom-rules-overview",
      "note": "Custom rules are available for free."
    }
  },
  "tests": {
    "ssllabs": null,
    "observatory": null,
    "internetnl_web": null,
    "internetnl_mail": null,
    "trackers": [
      {
        "name": "Intercom",
        "host": "widget.intercom.io",
        "effect": "none"
      }
    ],
    "tested_at": "2026-10-01T07:02:38.919Z"
  },
  "last_modified": "2026-10-01T07:44:20Z"
}