Cookies
Last updated: 27 September 2026
m3i.app uses only the cookies and browser storage the service needs to work. There is no advertising, tracking or audience measurement cookie, so we do not ask for your consent to them.
What the site stores in your browser
| Name | Type | What it is for | Lifetime |
|---|---|---|---|
sessionid |
Cookie | Keeps you signed in, and remembers the name you gave and what you posted as a guest | Two weeks |
csrftoken |
Cookie | Protects forms against requests forged by other sites | One year |
messages |
Cookie | Carries a one-off notice to the next page, such as "Welcome back" | Until the notice is shown, at most until you close the browser |
django_language |
Cookie | Remembers the language you picked with the language switcher | Until you close the browser |
theme |
Local storage | Remembers whether you chose the light, dark or system theme | Until you clear it |
m3i:install:<event> |
Local storage | Remembers that you closed the invitation to install an event's app | Until you clear it |
m3i-event-<event> |
Service worker cache | Keeps the last version of an event's wall you saw, with its photos, so it opens without network | Replaced at each visit online, 30 days at most, deleted with the event |
Third-party services
These services load only on the pages that need them, and may set their own cookies:
- Google: the "Continue with Google" button and, on event pages, the one-tap sign-in prompt, which uses a
g_statecookie to remember that you closed it. See Google's privacy policy. - Apple: the "Continue with Apple" button. See Apple's privacy policy.
- Cloudflare Turnstile: the check on the sign-in, sign-up and password reset forms. See Cloudflare's privacy policy.
- Cloudflare Web Analytics: page views and load times, measured without any cookie or local storage.
Controlling them
You can delete cookies, local storage and the offline copy of a wall from your browser settings at any time, or by removing the event's app from your phone. Without the sessionid and csrftoken cookies, you cannot sign in or post.
More about your data in the Privacy policy.