Privacy Policy

1. Who We Are

MindBenchmark — the website at mindbenchmark.com and the MindBenchmark iPhone app (together, the “Service”) — is operated by RandomFuse LLC (“we,” “us,” “our”), the data controller for the information described below. For privacy questions, contact contact@mindbenchmark.com.

2. Information We Collect

We collect the minimum needed to operate and improve the Service.

Information collected automatically

• Usage analytics. We use Google Analytics 4 and Vercel Analytics to record events such as page views, test starts, completions, resets, dwell time on results, and share/challenge interactions. These events include anonymous identifiers and approximate geographic location (derived from IP), but we do not store raw IP addresses in our systems.
• Device and browser information. User agent, device type (mobile/desktop/tablet), screen size, language, and referrer.
• Cookies and similar technologies. See Section 5.
• Test results. When you complete a cognitive test on this site, we transmit the following to our backend to power community percentile rankings:
  • the test you took (its slug) and the score you earned;
  • the test version (a small integer; used to segregate scoring rule changes);
  • the time you completed the test (achieved_at);
  • an anonymous device identifier generated in your browser’s localStorage (a random UUID, not linked to your identity);
  • one-way hashed forms of your IP address and user agent (used for fraud detection; the IP hash is cleared 30 days after submission);
  • your browser’s name and version, and whether you’re using a desktop or mobile platform;
  • optionally, an age bracket (only if you choose to provide one in a future release) and a session-duration measurement (how long the test took).
  We do not collect your name, email address, or any other identifier you would recognize. You can disable score submission at any time using the toggle below. Note: this is separate from the analytics described above; opting out here does not stop analytics collection (use your browser’s settings for that).

Information stored on your device

• Best scores, most-recent results, and test history are stored in your browser via localStorage. This data never leaves your device unless you share a challenge link.
• A rotating anonymous session identifier used to deduplicate analytics events.

Information you provide directly

• Email address, if you contact us at support@mindbenchmark.com or contact@mindbenchmark.com.
• Any content you share publicly (e.g., challenge links) — see our Terms.

3. How We Use Information

• Operate, maintain, and improve the Service;
• Understand which tests are used, how well they perform, and where users drop off;
• Compute aggregate statistics (averages, distributions, percentiles) that may be published as public benchmarks on the Service;
• Detect, investigate, and prevent fraud, abuse, and technical issues;
• Respond to inquiries you send to our contact addresses and enforce our Terms of Service;
• Comply with legal obligations.

We do not sell or rent personal information. We do not use the Service to profile you for behavioral advertising outside the Service.

4. How We Share Information

We share information only in these narrow cases:

• Service providers. Google (Google Analytics 4), Vercel (hosting, edge analytics), Microsoft (IndexNow indexing), and Neon or an equivalent database provider (if and when the data capture layer is activated). These providers process data on our behalf under contractual safeguards.
• Public aggregates. We may publish statistics derived from collective results (e.g., “median reaction time: 258 ms”). Public aggregates never identify an individual.
• Challenge links. When you share a challenge link, the score you chose to share is encoded in the URL and visible to anyone who opens the link.
• Legal compliance. We may disclose information to comply with law, a valid legal process, or to protect the rights, property, or safety of MindBenchmark, our users, or the public.
• Business transfers. In a merger, acquisition, or asset sale, information may be transferred. We will notify users of any change in ownership or use of information.

5. Cookies and Similar Technologies

We and our third-party providers use cookies and similar technologies to:

• Measure traffic and understand how the Service is used (Google Analytics, Vercel Analytics);
• Maintain session continuity (session identifier);
• Remember your best scores and last-used settings (localStorage).

Most browsers let you control cookies through settings. Blocking cookies may impair certain features (e.g., best-score persistence). We honor the GPC and Do Not Track signals by refraining from third-party analytics where technically feasible.

5a. Score Sharing Controls

By default, anonymous test scores are shared with our backend so we can compute community percentile rankings. The data we collect for this purpose is described in Section 2 above and includes no personal identifiers. To opt out on this device:

5b. MindBenchmark for iPhone

The iOS app is covered by this policy, with one important difference from the website: score sharing in the app is opt-in and OFF by default. The app is fully usable offline, requires no account, and makes no network request for score sharing until you explicitly turn it on — during first-run onboarding or later in Settings → Sharing.

When sharing is on, each submitted result sends:

• a random identifier generated on this device (no name, no email, no account) — you can replace it any time with Settings → Reset anonymous ID;
• the test played, its version, your score, and when you achieved it;
• your age band, only if you chose to provide one;
• app version and iOS version, plus a temporary hashed form of your IP address used for rate limiting and deleted within 30 days.

The app does not use advertising identifiers, does not track you across apps or websites, and contains no third-party analytics or advertising SDKs. Crash diagnostics are collected by Apple’s MetricKit and stay on your device unless you choose to share them with us. Turning sharing off stops all future submissions; scores already contributed are anonymous and cannot be traced back to you, so they remain in the aggregate pool. Deleting the app removes all locally stored scores.

Questions or requests about app data: support@mindbenchmark.com.

6. Your Rights

Depending on your jurisdiction (including the EU/UK under GDPR, California under the CCPA/CPRA, and similar laws in other regions), you may have the right to:

• Access, correct, or delete personal information we hold about you;
• Object to or restrict certain processing;
• Port your personal information to another service;
• Withdraw consent where processing is based on consent;
• Opt out of the “sale” or “sharing” of personal information (we do not do this);
• Lodge a complaint with a supervisory authority.

Because we operate without accounts and collect only pseudonymous analytics, our ability to locate data tied to a specific individual may be limited. To exercise rights, email contact@mindbenchmark.com with enough detail (e.g., approximate dates, browser) for us to act on the request. You can delete all data stored on your device by clearing your browser’s site data for mindbenchmark.com.

7. Children’s Privacy

The Service is not intended for children under 13. We do not knowingly collect personal information from children under 13. If you believe a child under 13 has provided us personal information, email contact@mindbenchmark.com and we will delete it.

8. Data Retention

Analytics events are retained for up to 26 months (Google Analytics default), after which they are deleted or anonymized. localStorage data persists on your device until you clear it. Aggregate statistics derived from data (medians, distributions) may be retained indefinitely, as they cannot be traced back to an individual.

9. International Data Transfers

The Service is hosted in the United States and information may be processed in countries other than where you live. Where required, we rely on approved transfer mechanisms (including Standard Contractual Clauses) to protect personal information transferred out of the EU/UK.

10. Security

We use reasonable administrative, technical, and physical safeguards designed to protect information (TLS in transit, limited access, scoped credentials). No system is perfectly secure; we cannot guarantee absolute security.

11. Changes to This Policy

We may update this Privacy Policy. The “Last updated” date above reflects the current version. Material changes will be communicated via the Service.

12. Contact

Questions or privacy requests? Email contact@mindbenchmark.com.