02Essential cookies
These cookies are required for the site to function. You cannot opt out — without them, you can't stay signed in.
| Name | Purpose | Lifetime | Set by |
|---|---|---|---|
convexa_session | Signed JWT that keeps you logged in. HttpOnly, Secure, SameSite=None — unreadable by JavaScript. | 30 days from the last successful login. | Vertexa |
__cf_bm | Cloudflare bot-management challenge. Filters automated traffic before it reaches our servers. | 30 minutes, sliding. | Cloudflare |
03Preference storage (localStorage)
These items live in your browser's localStorage. They never touch our servers unless you sign up.
| Key | Purpose | Lifetime |
|---|---|---|
convexa_language | Remembers your language selection (one of 9). | Persistent until cleared. |
convexa_prefs | Your default FROM / TO currencies and the amount you last converted. | Persistent until cleared. |
convexa_geo | A cached copy of your detected country so we don't need to look it up on every visit. | 24 hours. |
04What we don't use
- No Google Analytics, no Facebook Pixel, no LinkedIn Insight tag.
- No advertising cookies. Vertexa does not run ads.
- No cross-site tracking pixels.
- No session-replay tools (Hotjar, FullStory, Mouseflow, etc.).
05How to control cookies
Every major browser lets you view, block, and delete cookies from a single settings screen:
- Chrome — Settings → Privacy and security → Cookies and other site data.
- Firefox — Settings → Privacy & Security → Cookies and Site Data.
- Safari — Settings → Privacy → Manage Website Data.
- Edge — Settings → Cookies and site permissions → Cookies and site data.
06Changes to this policy
If we add, remove, or change a cookie we'll update the table above and bump the Last updated date. If a new cookie ever becomes non-essential (for example, if we start using analytics) we'll ask for your consent before setting it.