Legal

Cookie Policy

Last updated: Feb 27, 2026

This Cookie Policy explains how Bloodwork.app ("Bloodwork," "we," "us," or "our") uses cookies and similar tracking technologies when you visit our website and use our platform.

This Policy should be read alongside our Privacy Policy, which explains how we collect and use personal information more broadly.

1. What Are Cookies

Cookies are small text files placed on your device by a website when you visit it. They allow the website to remember your actions and preferences over a period of time so you don't have to re-enter them whenever you return.

We also use similar technologies such as pixels, tags, web beacons, and local storage, which function in a comparable way. This Policy covers all such technologies collectively referred to as "cookies."

2. Categories of Cookies We Use

Strictly Necessary

These cookies are essential for the website and platform to function. They enable core features such as user authentication, session management, security, and access to paid features. You cannot opt out of strictly necessary cookies.

  • Authentication tokens to keep you logged in
  • Session identifiers for secure platform access
  • Security and fraud-prevention cookies
  • Load-balancing and performance cookies required for stability

Functional

Functional cookies remember your preferences and settings to improve your experience. These cookies are not strictly necessary but enhance usability.

  • Language and regional preferences
  • UI preferences and layout settings
  • Recently viewed content

Analytics

Analytics cookies help us understand how visitors use the website — such as which pages are visited most often and where users encounter difficulties. This data is used in aggregated, anonymized form to improve the platform.

  • Google Analytics — measures page visits, session duration, and user flow
  • Error and performance monitoring tools

Google Analytics is configured with IP anonymization enabled. For more information, see Google's Privacy Policy.

Marketing and Advertising

Marketing cookies are used to measure the effectiveness of our advertising campaigns and to show you relevant ads about Bloodwork on third-party platforms. These may be set by advertising partners such as Google and Meta.

  • Conversion tracking for advertising campaigns
  • Audience matching using hashed identifiers (not health data)
  • Frequency capping to limit how often you see the same ad

We do not pass health data, lab results, or biomarker values to advertising networks. Marketing cookies are based solely on your account or engagement status with Bloodwork. For EU/UK users, marketing cookies are only activated after you provide consent via our cookie consent banner.

3. Third-Party Cookies

Some cookies on our platform are set by third-party services that we use to provide functionality or measure performance. These third parties have their own privacy policies governing how they use the data collected.

  • Google Analytics — website analytics (Google Privacy Policy)
  • Google Ads — advertising measurement and audience matching
  • Meta (Facebook) — advertising measurement and custom audience matching via hashed identifiers only

We use Google Consent Mode v2, which ensures that ad measurement and personalization cookies are only activated once you provide consent (for EU/UK users) or are otherwise permitted under applicable law.

4. Managing Your Cookie Preferences

You have several options for managing cookies:

Cookie Consent Banner (EU / UK)

If you are located in the European Union or United Kingdom, you will be presented with a cookie consent banner when you first visit our site. You may accept all cookies, reject non-essential cookies, or customize your preferences. You can change your preferences at any time by clicking the "Cookie Settings" link in the footer.

Browser Settings

Most browsers allow you to view, manage, block, or delete cookies through your browser settings. Blocking strictly necessary cookies may prevent the platform from functioning correctly.

  • Chrome: Settings → Privacy and Security → Cookies
  • Safari: Preferences → Privacy → Manage Website Data
  • Firefox: Settings → Privacy & Security → Cookies and Site Data

Advertising Opt-Outs

You can opt out of interest-based advertising through your platform settings:

5. Do Not Track

Some browsers transmit "Do Not Track" (DNT) signals. We do not currently alter our data practices in response to DNT browser signals, as no uniform industry standard for interpreting them exists. We disclose our tracking practices fully in this Policy.

EU and UK users can manage their preferences through the cookie consent banner described above, which provides a more granular and legally meaningful mechanism than DNT.

6. Changes to This Policy

We may update this Cookie Policy from time to time to reflect changes in the technologies we use or applicable legal requirements. Material changes will be communicated via an updated notice on our website or through the cookie consent banner.

The date at the top of this Policy reflects when it was last updated.

7. Contact Us

For questions about our use of cookies or this Policy:

Bloodwork – Privacy Department

privacy@bloodwork.app