Cookie Policy (Web App)
Effective date: 8 May 2026 Version: 1.0
This Cookie Policy applies to the AstroNum Web App at astronum.me. The Mobile App does not use cookies (it uses platform-native secure storage instead).
What are cookies
Cookies are small text files placed on your device by websites you visit. They are widely used to make websites work, more efficient, and to provide information to site owners.
Cookies we use
Strictly necessary (cannot be disabled)
| Cookie | Purpose | Retention | Provider |
|---|---|---|---|
sb-access-token |
Authentication session | 1 hour (refreshed) | AstroNum / Supabase |
sb-refresh-token |
Refresh authentication | 30 days | AstroNum / Supabase |
astronum_csrf |
CSRF protection on forms | Session | AstroNum |
Functional (set after consent)
| Cookie | Purpose | Retention | Provider |
|---|---|---|---|
astronum_locale |
Remember your language preference | 1 year | AstroNum |
astronum_theme |
Remember dark/light theme | 1 year | AstroNum |
Analytics (set after consent)
| Cookie | Purpose | Retention | Provider |
|---|---|---|---|
ph_* (multiple) |
Product analytics events | 1 year | PostHog (EU instance) |
PostHog is configured to use cookieless tracking by default. The cookies above are set only if you opt in via the cookie banner.
Payment (set during checkout)
| Cookie | Purpose | Retention | Provider |
|---|---|---|---|
__stripe_mid |
Fraud prevention | 1 year | Stripe |
__stripe_sid |
Session tracking during checkout | 30 minutes | Stripe |
Stripe cookies are set when you proceed to payment; they are necessary for Stripe to detect and prevent payment fraud and cannot be disabled while completing a purchase.
Cookies we do NOT use
We do not use cookies from:
- Google Analytics
- Facebook / Meta pixels
- TikTok pixel
- Advertising networks
- Affiliate-tracking pixels
Your choices
When you visit the Web App for the first time you will see a cookie banner with three options:
- Accept all — enables functional + analytics cookies.
- Reject non-essential — only strictly-necessary cookies are set.
- Customize — choose per-category.
You can change your choice at any time via Settings → Privacy → Cookies.
Browser-level controls
Most browsers let you block or delete cookies. See:
If you block strictly-necessary cookies, parts of the Web App may not function correctly (you may not be able to log in).
Updates
We may update this Cookie Policy. Material changes will be notified in-app.