Cookie Policy
Last updated: 7 September 2026
How we use cookies and local storage
We use three groups. All of them load on every visit.
1. Strictly necessary — always on
session-id — a technical identifier used by our hosting provider to serve the page. Expires with the browser session.
__dpl — a routing cookie set by our hosting platform. Expires with the browser session.
sb-…-auth-token — keeps you signed in. Set only after you sign in. Up to one year.
synapse.day-program — remembers your progress through the Day 1 programme when you are not signed in. Stored in your browser's local storage.
2. Analytics
First-party product analytics. We record which exercises are started and completed and which steps of sign-up are reached, together with a random identifier stored in your browser and the campaign parameters of the link you arrived through. This data is stored in our own database and is not shared with anyone. The identifier lives for six months.
Google Analytics, provided by Google Ireland Limited, for audience measurement. Cookies _ga and _ga_*.
3. Advertising
Meta Pixel, set by us on behalf of Meta Platforms Ireland Limited, for audience measurement and advertising. It measures how many people who saw our advertising on Facebook or Instagram went on to use Synapse, and lets us reach similar audiences. Cookie _fbp.
Transfers and deleting cookies
Google and Meta may transfer data outside the European Economic Area. You can delete cookies in your browser settings.
Children
We do not direct advertising at users we know to be children. See section 9 of the Privacy Policy.