TradesMath Privacy Policy

Effective date: October 19, 2026 · Applies to the TradesMath iOS app (v1.0+) · Published by jiaxing huang

TradesMath is a code-edition calculator toolbox for trade professionals (electricians, plumbers, and related trades). This policy describes what information the app handles and how.

1. Data stored on your device only

• Calculation history — each calculation you run (tool name, inputs, result) is stored locally so you can revisit it in the History tab.
• Usage statistics — the app keeps an on-device tally of which calculators you use and how often (a local event counter). This is not analytics: it never leaves your device and is not visible to us. You can export it yourself as a JSON file via Edition → Export usage statistics whenever you want, and erase it entirely by deleting the app.
• Onboarding state — a single flag recording whether you completed the introduction.

Deleting the app erases all of the above.

2. No network access

TradesMath performs no network requests. All calculators, reference parameters, and unit conversions run entirely on-device. There is no sign-in, no sync, no advertising, and no third-party SDKs of any kind. Code-edition parameter updates, when published, are delivered through the App Store app-update channel — never through in-app connections.

3. Built-in reference content

Electrical parameters shipped inside the app are original compilations prepared for this app, versioned by code edition, stored on your device. They reference code table and section numbers for orientation only. No copyrighted standard text is reproduced; all referenced codes and standards remain the property of their respective publishing organizations (including the National Fire Protection Association).

4. No data collection

• We do not collect, transmit, sell, or share any personal information.
• The app contains no analytics, no advertising, and no third-party SDKs.
• The app does not require an account and does not use identifiers to track you across apps or websites.

5. Children

TradesMath does not knowingly collect any information from anyone, including children, because it does not collect information at all.

6. Changes to this policy

If this policy changes, the new version will be posted at this address with an updated date. If a future version introduces any network capability (for example, a planned in-app purchase in a later release, which uses Apple's own StoreKit infrastructure), this policy will be updated before release and the app's privacy labels will be revised accordingly.

7. Professional disclaimer

TradesMath provides general calculation tools only. It does not replace the judgment of a licensed trade professional, and no output of the app constitutes engineering, installation, or code-compliance advice. Results are derived from on-device reference parameters and physics formulas, are approximations, and may not reflect your jurisdiction's adopted code edition or local amendments — always verify against the current official code text and your authority having jurisdiction (AHJ). Every result screen in the app carries this disclaimer.

8. Contact

If you have questions about this policy, contact the developer through Apple's App Store support channel for this app.