Cookies & tracking
Last updated: 4 October 2026. Cognivo is free, and ads shown by Google pay for it. This page lists everything stored in your browser while you use Cognivo: the few things Cognivo sets itself so the site works, and what Google sets for analytics and ads. It also tells you how to say no to each.
These are never shared with anyone and never used for analytics or ads. They need no consent because the site cannot do what you asked without them.
| Name | What it is for | How long |
|---|---|---|
| cognivo_device | An anonymous random value that tells the game server which seat is yours in a live game or tournament. It holds no name or email, cannot be read by page scripts (HttpOnly), and is set only when you play another person. | 1 year |
| cognivo.* (local storage) | Your preferences and progress: board and piece theme, lesson progress, Spy Games scores, arcade best times, best Endless run, Daily results for the last 30 days and sound, your work in the Labs (Level Lab, Sprite Lab and Animation Lab, and whether a game plays your art), the live game or tournament you are in, and the announcement you dismissed. Kept in your browser only, never sent anywhere. | Until you clear it |
Used to count page views and see which games and lessons people reach. What comes back to Cognivo is aggregate counts, never who you are. Details are on the page.
| Name | What it is for | How long |
|---|---|---|
| _ga | Tells one visit from another, so visitors are not counted twice. | 2 years |
| _ga_<id> | Keeps the state of the current visit for Cognivo's Analytics property. | 2 years |
Ads on Cognivo are chosen and served by Google, not by Cognivo. Google and its partners use cookies to show ads, to measure them, to limit how often you see the same one, and to prevent fraud. Ads may be personalised: chosen using information about your activity on this and other sites that use Google's ad services. Where you have declined personalisation, or where the law requires it, Google shows ads chosen from the page alone, still with cookies for frequency capping and fraud prevention unless you refuse those too.
| Name | What it is for | How long |
|---|---|---|
| __gads | Ad delivery and measurement, and how often an ad has been shown to you. | 13 months |
| __gpi | The same, for Google's publisher tools. | 13 months |
| __eoi | Fraud and abuse prevention for ads. | 6 months |
| Google domains (e.g. IDE, NID) | Set by Google's ad servers on their own domains, mainly for personalised advertising. | Up to 13 months |
Google publishes the full, current list in the cookies Google uses for advertising and explains how Google uses information from sites that use its services.
Email support@cognivo.digital.