Security

We take the security of Calculateus.com and any data you choose to share with it seriously. Here's a straightforward look at how things are built.

Encryption in transit

The entire site is served over HTTPS. Your connection to Calculateus.com is encrypted end to end.

Authentication

Sign-in is handled entirely by Google Firebase Authentication - an industry-standard identity platform used by millions of apps. We never see or store your password; for email/password accounts, Firebase handles hashing and storage, and for Google sign-in, authentication happens directly with Google.

Data access controls

Your synced favorites, calculation history, and account data are stored in Firestore with security rules that restrict access to your own signed-in account only - enforced on the server, not just hidden in the interface. Nobody, including us, can read another user's synced data through the app.

What we don't do

• We don't store the raw numbers you type into a calculator unless you're signed in and the calculator explicitly saves a result to your history.
• We don't sell personal data.
• We don't ask for financial account credentials, social security numbers, or other sensitive identifiers anywhere on the site.

Reporting a security issue

If you believe you've found a security vulnerability on Calculateus.com, please report it responsibly to mdfahimhasan894@gmail.com with details to reproduce it. We ask that you give us a reasonable opportunity to fix an issue before any public disclosure, and that you avoid accessing or modifying data that isn't yours while investigating.

Related pages

See also our Privacy Policy for what data we collect and why.