Cookies and visit measurement
This site uses no advertising or third-party cookies. Without your permission only anonymous daily counters are kept: page, referring site, campaign, language, total time each page is read, how many times each feature is used (for example the “Surprise me” button or exporting a strategy) and approximate country. The country is derived from the IP address at the time of the visit with a local database; the IP is not stored. None of this carries an identifier or user agent, so what a specific person did cannot be known.
| Cookie | Purpose | Type | Expires |
|---|---|---|---|
arena_consent | Your cookie choice | Necessary | 1 year |
lang | Language you pick with the globe button | Necessary (preference) | 1 year |
theme (localStorage) | Light or dark theme you pick | Necessary (preference) | until you clear it |
arena_session | Keeps you signed in | Necessary | 14 days |
arena_vid | Random identifier to measure returning visits, source and conversion | Analytics (only if you accept) | 13 months |
What we keep if you accept analytics
If you accept, besides the random identifier (arena_vid) we keep the pages you visit, date and time, referring site, campaign (utm_*), language, device type (mobile, tablet or desktop) and your IP address. An IP address is personal data: we use it only for audience statistics and abuse detection, we do not share it with third parties, and it is deleted after 13 months, like the identifier. If you reject, none of this is kept: only the anonymous counters above.
With analytics accepted we also keep, linked to that identifier, the time you spend on each page and the actions you take (which buttons and features you use, never the content of what you type).
If you have an account
While you are signed in we record the use you make of your account, whether or not you accept analytics: time on each page and actions, and in the Laboratory the strategies you save, load, export, import, enable or delete, the “Surprise me” searches and the questions to the help assistant. We use it to improve the service, to apply usage limits (for example the daily “Surprise me” allowance) and to understand which features matter. It is not shared with anyone. It is kept for 13 months and deleted with your account. Legal basis: legitimate interest.
You can change your choice at any time with “Cookie settings” in the footer. Rejecting does not limit any feature. If you withdraw consent, we delete the cookie and the visit data linked to it.
Country geolocation: IP to Country Lite database by DB-IP (CC BY 4.0 licence), looked up on our own server.
More about your data and your rights in the Privacy policy.