Privacy policy
Learn how Calcr handles local calculations, Cloudflare hosting, browser storage and optional Google Analytics after consent. Advertising remains off.
Updated
Who operates Calcr
Calcr is operated by Calcr Team. For privacy questions or requests, email support@calcr.app.
Calculations and page requests
Calcr's public calculators process their numerical inputs in your browser. A visitor account is not required. The application does not send raw numbers, dates, grades or calculation results as analytics events. Scientific calculation history belongs to the current session rather than an account history.
Calcr is hosted on Cloudflare. Loading a page sends the technical request information needed to deliver the website, such as an IP address, requested URL and browser headers. Operational observability is enabled to help diagnose errors. These hosting and diagnostic records are separate from optional usage analytics. Do not put personal data into a page URL. Network information needed to deliver a page is separate from the numbers entered into a calculator.
Storage on your device
The website uses browser storage for preferences and functions such as theme selection, language selection, game best scores and privacy choices. Clearing site data can reset those preferences and records. See the cookie and storage policy for these categories.
Administrator information
The private content-management area is for authorized administrators. It stores administrator account information and authentication records used to manage content and secure access. Public visitors do not need or receive administrator accounts.
Optional Google Analytics
On your first visit, the Google Analytics tag stays blocked until you choose Allow analytics. Choosing Reject optional services leaves it blocked. Analytics does not run in administrator, sign-in, API, privacy-policy or cookie-policy areas. Calculators and games work without analytics.
After permission, the application sends page-view and tool-use events. Page addresses come from fixed published canonical paths, without the raw query string or URL fragment. The page title is fixed, and the application sends a blank page-referrer field. Tool events contain only allowed tool identifiers, action categories, language and fixed error categories. They do not include expressions, numbers, dates, grades, results, clipboard contents, game scores, email addresses or visitor account IDs.
Google Analytics can use analytics cookies and browser identifiers to associate visits and events. When you allow it, your browser makes requests to Google, which receives network information such as your IP address and browser details. Limits on application event fields do not prevent Google from receiving that connection information. Read Google's privacy policy for its handling of information. Advertising remains off.
Change your analytics choice
Open Privacy settings in the footer to change your choice. The preference is remembered in this browser, so a saved permission can apply on later visits to eligible pages. Withdrawing permission stops subsequent analytics events from the Calcr application. It does not automatically erase data Google already received or remove analytics cookies already written.
Local preferences and game records remain independent of optional analytics.
Managing your information
You can remove local preferences and game records through your browser's site-data settings. This also resets stored privacy choices and may sign an administrator out. Clearing browser storage does not remove technical information already received when a page was requested.
For questions about this policy or a privacy request, see the contact page. Describe the type of information involved without sending passwords, private calculation records or identity documents.
This page describes the services currently in use. External sites linked from Calcr have their own privacy policies.