Product CityProduct City

    Privacy Policy

    CalculateR — Solve Anything, a free calculator and unit-converter app developed and shipped by the People of Product™ community network.

    Effective Date: 24th September 2026 · Last Updated: 24th September 2026

    1. The Short Version

    CalculateR — Solve Anything ("CalculateR", "the App") is a calculator and unit-converter application developed and published by Product City ("Product City", "we", "us", "our"). We built CalculateR to be local-first and private by design. This policy explains, in plain language, exactly what data the App touches — which is very little — and your rights around it.

    • We do not collect, transmit, or store any personal data on our servers.
    • No account, sign-up, or login is required to use any feature.
    • All calculations, history, and settings are stored only on your device.
    • The App makes one optional network request — to fetch currency exchange rates — and nothing else.
    • The App bundles an advertising SDK (Google AdMob) that is fully dormant: it is never initialized and sends no data.
    • We use no analytics, no crash-reporting, no tracking, no cookies.

    2. Data Stored on Your Device

    The App stores the following information locally on your device only, using the operating system's standard app-private storage:

    • Calculation history (expressions and results) — lets you review past calculations.
    • Settings (theme, haptics, angle unit) — remembers your preferences.

    This data never leaves your device. We have no access to it, and it is not backed up to any service we operate. Deleting the App (or clearing its history in Settings) permanently removes this data.

    3. Network Requests

    3.1 Currency exchange rates (optional)

    When you use the Currency converter, the App requests current exchange rates from the Frankfurter API (frankfurter.dev), a free public service that publishes European Central Bank reference rates.

    • The request contains only a rates query — no personal data, device identifiers, or usage information is sent.
    • Like any HTTPS request, your IP address is necessarily visible to the Frankfurter service as part of the connection. We do not control their logging; see their site for details.
    • Rates are cached on your device; if you are offline, the App works with cached or bundled approximate rates.
    • You can avoid this request entirely by simply not using the Currency category — every other feature works fully offline.

    3.2 What the App never does

    • Collect your name, email, contacts, photos, files, or location
    • Access your camera or microphone
    • Use advertising or analytics identifiers (IDFA, AAID)
    • Fingerprint your device
    • Track you across apps or websites
    • Sell or share data — there is nothing to sell or share

    4. Third-Party SDK Disclosure (Google Mobile Ads)

    The App's binary includes the Google Mobile Ads SDK (AdMob), bundled for a future optional ad-supported release. In the current release:

    • The SDK is never initialized and performs no network activity.
    • No ads are shown, and no advertising data is collected.
    • No App Tracking Transparency prompt is presented because no tracking occurs.

    If we enable advertising in a future update, this policy will be revised before that release, and the App will request consent where required by law or platform policy.

    5. Permissions

    The App requests no sensitive permissions. It requires no access to contacts, location, camera, microphone, photos, notifications, or Bluetooth.

    6. Children's Privacy

    The App collects no personal information from anyone, including children under 13 (or the applicable age of digital consent). It contains no social features, no account system, and no behavioral advertising.

    7. Your Rights (GDPR / CCPA / Other Laws)

    Because we collect no personal data, there is nothing held by us to access, correct, port, or delete. All app data lives on your device and is under your control:

    • Access: open History and Settings in the App.
    • Delete: use "Clear history" in Settings, or uninstall the App.
    • Restrict processing: decline to use the Currency converter, which is the only feature that makes a network request.

    If you have questions about your rights under GDPR, CCPA/CPRA, or other privacy laws, contact us (Section 9).

    8. Changes to This Policy

    We may update this policy as the App evolves (for example, if advertising is enabled). The "Last updated" date will always reflect the latest version, and the current policy will remain publicly accessible at the same URL. Continued use of the App after an update constitutes acceptance of the revised policy.

    9. Contact

    Product City — developer of CalculateR — Solve Anything
    Email: kapil@theproduct.city

    This policy applies to the CalculateR — Solve Anything app distributed via the Apple App Store and Google Play Store.