InsulSizer

Privacy Policy

Last updated: July 30, 2026

Data we collect

None. InsulSizer does not collect, transmit, or share any personal information, usage data, device identifiers, or location data. Every calculation runs entirely on your device, and the app makes no network requests of its own — there is no server for it to talk to.

Data stored on your device

Two small pieces of information are saved locally using the operating system's standard local storage:

• Your preferences — temperature unit, thickness/length unit, thermal-conductivity unit, heat-flow unit, default geometry (pipe or flat), language, and the numeric keypad setting.
• A rating-prompt counter — how many times you have opened the app, whether you have already rated it, and when the rating prompt was last shown. This exists solely so the app does not ask you to rate it repeatedly.

This data:

• never leaves your device
• is not accessible to the developer or any third party
• is permanently deleted when you uninstall the app

Actions that leave the app

InsulSizer never contacts the network on its own, but two features hand off to other apps when you tap them:

• Rate the app — opens the App Store / Google Play review dialog or listing. Your review is handled entirely by Apple or Google under their own privacy policies.
• Send feedback — opens your email app with a blank message addressed to the developer. Nothing is sent unless you write and send it yourself, and the app does not attach any data to it.

Third-party services

InsulSizer does not integrate any third-party analytics platforms, advertising networks, or crash-reporting services.

In-app purchases

InsulSizer is sold as a one-time purchase through the Apple App Store or Google Play Store. Payment processing is handled entirely by Apple/Google under their own privacy policies — the developer never sees or stores your payment information. There are no subscriptions and no additional in-app purchases.

Children's privacy

InsulSizer is a mechanical-insulation engineering tool and is not directed at children. Since the app collects no data from any user, this applies equally regardless of age.

Changes to this policy

If this policy ever changes — for example, if a future version adds an optional feature that touches data — this page will be updated and the "last updated" date above will change accordingly.

Contact

Questions about this policy can be sent to duongnh@axalize.vn.