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Cookies
Cookies are simple textual information stored on your device while using your internet browser. They are sent by the website/server you are visiting for various purposes, including tracking, advertising, user management, and many other potential features.
What cookies are we using?
- a cookie named acceptCookies to remember if you have clicked the "Understand" button in the pop-up
- a session cookie with a validity of 31 days
- a possible PostHog cookie called ph_phc_***_posthog
Web Analytics
We are using PostHog Web analytics to get a lot of statistics on the use of our website.
If you are not using a browser extension that is already disabling its use like "Privacy badger" or some ad blockers, you have the option to disable it below, if you want to do so:
Please note that in order to remember that you opted out from PostHog Web Analytics use, we need to store that decision as a value in localStorage. 😁 (it is called isPostHogConsentGranted)
localStorage and sessionStorage
But cookies are not the only technology used by website to store persistent data on users' devices.
The other 2 main web storage types are local storage and session storage, behaving similarly to persistent cookies and session cookies respectively.
On this website, we are using the localStorage API to store the following data:
| Key (name) | Example value | Purpose |
| theme | dark | the theme color variant |
| isPostHogConsentGranted | false | the value of the checkbox if you have changed the default value on this page |
| mentalcalculation_history | ["5 - 1 + 3 + 2 ❌",...] | the history of operations on mentalcalculation.html page |
| mentalcalculation_settings | {"digits":2,"rows":5,"flash":500,"timeout":500,...} | the settings for the mentalcalculation.html page |
| viewed | ["3qsXM4PZkaR4XcKADN9Ttq2H",...] | the history of interactive generated HTML worksheet |
| ph_phc_***_posthog | {...} | posthog local data |
| distinct_id | 0197266e-08f6-70b7-b0ee-a6c6094db74b | used for TTS stats tracking on mentcalcalculation.html |
Indexed database API
We are also using the IndexedDB API to store and cache the mp3 data of the TTS sounds on the mentalcalculation.html page.
This is done to limit the network transfers between your browser and this website; this is good for the both of us 😁.
Contacting us
If you have any questions about this page, please contact us using the message form linked in the footer.