Cookie Policy
Version 1.0, effective 6 October 2026
This policy describes the cookies and browser storage the Blastt website (blastt.cz) uses. The Czech version is binding; this English one is a translation for your convenience. Operator: HARMANEC s.r.o., contact info@blastt.cz.
In short
Blastt uses only what it needs to work. No analytics, no advertising, no tracking, and no third-party cookies. Such strictly necessary storage needs no consent, so instead of a consent banner you see a short notice on your first visit.
If we ever wanted to use analytics or any other cookie that is not strictly necessary, we would first ask for your consent.
Cookies
| Name | What it does | How long |
|---|---|---|
blastt-locale | Remembers the language you chose | 1 year |
blastt-signed-in | Says only that this browser is signed in, so the address blastt.cz opens the app instead of the landing page. It contains no identity | 1 year, deleted when you sign out |
Both are first-party cookies set by blastt.cz.
Browser storage
Besides cookies, the website keeps some data in your browser. None of it is sent to anyone except as described below.
- localStorage: your settings and data on this device — favourites and recently visited venues, recent searches, the selected place, changes not yet sent to our server, the last chat message you saw, which tips and cards you dismissed. It stays until you clear it or, for what belongs to your account, until you sign out.
- sessionStorage: a draft of a match or competition you are creating, for as long as the tab is open.
- IndexedDB (Google Firebase): your sign-in session, so you stay signed in. It is deleted when you sign out. If you turn on notifications in the browser, Firebase Cloud Messaging also keeps the push subscription there, and a service worker receives the notifications.
How to delete them
You can delete cookies and site data at any time in your browser's settings (usually under Privacy → Cookies and site data). You will then be signed out and the website will forget the language and settings stored on that device. Your account and the data on our server are not affected; to delete those, use Settings → Delete account.
The map
The map tiles come from OpenFreeMap. Your browser downloads them directly, so OpenFreeMap sees your IP address; it sets no cookies.