Cookie Policy
OneCalcApp uses the smallest possible number of cookies — and none of them are advertising trackers we control.
1. Strictly necessary
These keep the site working: your theme choice, your cookie decision, and — if you create an account — a secure session token. They cannot be switched off.
2. Analytics (optional)
We use Google Analytics 4 to count page views and understand which calculators people find useful. Analytics storage is denied by default and only enabled if you press "Accept all".
3. Local storage
Favourites, recent conversions and file-conversion history are kept in your browser's local storage and IndexedDB. They never reach our servers and can be cleared from your browser settings.
4. Changing your choice
Clear your browser storage for onecalcapp.com to be shown the cookie banner again, then choose "Reject optional" to turn analytics off.
5. Contact
Questions about cookies or tracking can be sent to onecalcapp@gmail.com.