Cookie Policy
Applies to purehelix.bio and the Pure Helix research workspace
This page lists the cookies and browser storage this site actually uses, grouped by category. Only the strictly necessary category runs before you make a choice. Everything else stays switched off until you allow it, and you can change or withdraw your choice at any time.
Strictly Necessary
Required for the site to function. These cannot be switched off, and they are used only to deliver the service you asked for.
| Name | Provider | Purpose | Duration |
|---|---|---|---|
| Authentication session | Pure Helix (backend auth service) | Keeps you signed in to your account and the research workspace. | Session, refreshed while signed in |
| Cart contents | Pure Helix (browser local storage) | Remembers the items in your cart between pages so checkout works. | Persistent until cleared |
| Checkout session | Stripe | Processes card payment and protects the payment page against fraud. | Set by Stripe during checkout |
Functional
Remembers choices you make. Switching this off means those choices are forgotten.
| Name | Provider | Purpose | Duration |
|---|---|---|---|
| Interface preferences | Pure Helix (browser local storage) | Remembers dismissed notices, acknowledged research-use prompts, filter and unit choices, and workspace layout. | Persistent until cleared |
Analytics
Our measurement is first-party: usage rows are written to our own backend rather than to an external advertising network. No analytics rows are written unless you allow this category.
| Name | Provider | Purpose | Duration |
|---|---|---|---|
| Measurement session id | Pure Helix (first-party, stored in our own database) | A rotating local identifier used to count page views, catalog interest, search and tool usage. Records coarse device type, viewport size, language, and time zone. Not sold or shared. | Persistent until cleared; session flag ends when the tab closes |
Marketing
We do not run advertising pixels or sell data to advertisers. This category covers first-party campaign attribution only.
| Name | Provider | Purpose | Duration |
|---|---|---|---|
| First-touch campaign attribution | Pure Helix (browser local storage) | Records the campaign parameters or referring site that brought you here, so we can measure which channels work. | Persistent until cleared |
Third-Party Services That May Set Storage
- Stripe — payment processing and fraud prevention on the checkout page. Strictly necessary when you check out.
- Backend platform (database, authentication, file storage) — hosts your account, orders, and workspace data. Strictly necessary.
- Google Fonts — serves the site typefaces from Google's content delivery network; your IP address is visible to that network when fonts are fetched.
- YouTube — educational videos are linked out to YouTube rather than embedded, so YouTube storage is only set if you follow a link.
Managing and Withdrawing Consent
Use the Cookie Preferences control above, or the same link in the footer of every page, to change your categories or withdraw consent. Your choice is stored locally in your browser; clearing site data resets it and you will be asked again. You can also block or delete cookies in your browser settings, though the strictly necessary items are required for sign-in, cart, and checkout to work.
Contact
Questions about this policy can be sent to privacy@purehelix.bio.