Privacy Policy

TCalc.it ("we," "us," or "our") respects your privacy. This policy explains how we handle data for the TCalc.it app. We strictly adhere to the "Data Minimization" principle-we only collect what is absolutely necessary to make the app work.

Account Data: Email, display name, and profile photo via Google/Apple/Email.

Resource Updates: If you choose to sign up, we store your email address, the page where you signed up, the printable reference offer, and the wording and date of your consent in Firebase. We use this separate list for occasional TCalc time-tool and printable-resource updates. Downloads remain free without signing up. The signup form does not send email, and addresses are not verified yet. Your email is never included in signup analytics events. For abuse protection, we keep a hashed network identifier and attempt count in server memory for up to one hour.

Usage Data: Calculation layouts and preferences synced to your account.

Analytics Data: We record which features are used: the kind of value in a calculation (a duration, a date, a timecode), which output format and keypad you pick, and expressions the calculator failed to parse, so we can fix them. We do not record the results of your calculations, and successful expressions are never sent.

Identifiers: We use device and installation identifiers to keep you signed in and make app features work. The app currently shows no advertising, and we do not use mobile advertising IDs. If we ever introduce ads, this policy and an in-app consent flow will be updated first.

Cookies & Website Analytics: The tcalc.it website uses Google Analytics to understand aggregate usage (pages visited, feature engagement). Analytics cookies are only set after you accept them in the cookie banner, and you can change your choice at any time via "Cookie Settings" in the footer. We do not use cookies for advertising.

Sensitive Data: We do not collect sensitive personal information (e.g., biometric or health data).

To provide our service, we share limited data with:

• Google Firebase: For database hosting, authentication, and usage analytics (US-based).
• Google Analytics: For aggregate website usage statistics (US-based).
• RevenueCat / Stripe: For processing the one-time Pro purchase and PCI-compliant billing.

To withdraw your resource-update consent or delete that signup, email info@tcalc.it from the subscribed address. We remove it from the list within 30 days. We keep the signup until you withdraw consent or we discontinue the resource updates. Deleting an app account does not automatically remove a separate resource-update signup. Future resource emails will include an unsubscribe option.

You have full control. You may initiate account deletion at any time via Settings > Account > Delete Account, or by emailing us at info@tcalc.it from the address linked to your account. This permanently erases your account, layouts, and calculation history from our active databases within 30 days.

If you are in the European Union, you have the right to access, correct, export, and delete your personal data, and to object to or restrict its processing. To exercise any of these rights, email us at info@tcalc.it. You also have the right to lodge a complaint with your local data protection authority (in the Czech Republic, the Office for Personal Data Protection, ÚOOÚ).

Questions? Reach out at info@tcalc.it.