Cookie Policy
Last updated: 1 March 2026 · Version 1.0
This Cookie Policy explains what cookies are, how Healzen uses them, and how you can manage your preferences. We aim to use only what is necessary and give you full control over optional cookies.
What Are Cookies?
Cookies are small text files stored on your device by your browser when you visit a website or use a web app. They allow the app to remember information about your visit — such as your language preference or login state — making your next visit faster and more personalised.
Cookies set by the site you are visiting are called “first-party cookies”. Cookies set by third-party services (analytics, error monitoring) are “third-party cookies”. We use both types, as described below.
Cookies We Use
Strictly Necessary Cookies
ALWAYS ACTIVEThese cookies are required for the app to function. They manage your login session and protect against cross-site request forgery attacks. You cannot opt out of these cookies while using the app.
- Examples
- session_token, csrf_token, auth_refresh
- Retention
- Session / up to 7 days (refresh token)
- Provider
- Healzen (first-party)
Functional Cookies
ALWAYS ACTIVEStore your preferences such as language, colour theme, and dismissed banners so the app remembers your choices across visits.
- Examples
- NEXT_LOCALE, theme_preference, health_disclaimer_v1
- Retention
- Up to 12 months
- Provider
- Healzen (first-party)
Analytics Cookies
OPT-INHelp us understand how users interact with the app: which features are used, error rates, and performance metrics. This data is fully anonymised. These cookies are only set with your explicit consent.
- Examples
- _ga, _gid (Google Analytics — opt-in only)
- Retention
- Up to 13 months
- Provider
- Google Analytics (third-party, anonymised IP)
Performance / Error Monitoring
OPT-INCapture anonymous error reports and performance data to help us debug issues faster. No personal or health data is captured in these traces.
- Examples
- sentry_id (Sentry — opt-in only)
- Retention
- 90 days
- Provider
- Sentry (third-party)
Managing Your Cookie Preferences
You can manage optional cookies at any time from Settings → Privacy → Cookie Preferences, or from the consent banner shown on first use.
You can also control cookies through your browser settings. Most browsers allow you to view, delete, and block cookies from specific sites. Note that blocking strictly necessary cookies will prevent the app from functioning correctly.
For more information on managing cookies in your browser:
- Chrome: Settings → Privacy and security → Cookies
- Firefox: Options → Privacy & Security → Cookies
- Safari: Preferences → Privacy → Cookies
- Edge: Settings → Cookies and site permissions
Do Not Track
Some browsers transmit a “Do Not Track” (DNT) signal. Health AI currently does not respond to DNT signals because there is no consistent industry standard. You can control analytics cookies explicitly through our Cookie Preferences panel or your browser settings.
Third-Party Cookie Policies
Optional third-party cookies are only set with your explicit consent. The third parties we use are subject to their own privacy policies:
- Google Analytics — analytics.google.com
- Sentry — sentry.io/privacy
Changes to This Policy
We may update this Cookie Policy when we add or remove cookies. We will notify you of significant changes via in-app notification. The “Last updated” date at the top of this page will always reflect the most recent revision.
Contact
Questions about our use of cookies? Contact us at [email protected] or write to: [email protected]
Questions? Email [email protected]