App: Curtain Calc | Effective: May 2026
Curtain Calc ("the App") is a curtain-fitting calculator that helps you determine whether a curtain panel will adequately cover a window. This policy explains our data practices — which, by design, are minimal.
We do not collect, transmit, sell, or share any personal information. The App has no internet connection and makes no network requests of any kind.
All calculation records (window dimensions, curtain dimensions, overlap values, coverage results, and optional names) are stored locally on your device using Apple's UserDefaults API. This data never leaves your device and is deleted automatically when you uninstall the App.
Curtain Calc does not request access to your camera, photos, microphone, location, contacts, health data, or any other system resource.
The App contains no third-party SDKs, analytics libraries, advertising networks, or crash-reporting services.
Because no data leaves your device, there is no server-side data to secure. Your measurements remain private on your device.
You can delete all saved records at any time from within the App's Settings screen. Uninstalling the App permanently removes all locally stored data.
The App does not collect any information from anyone, including children under 13. It is safe for all ages.
If we update this policy, the new version will be posted here with an updated effective date. Continued use of the App constitutes acceptance of any changes.
Questions? Email: 544627835@qq.com
| Data Type | Collected | Notes |
|---|---|---|
| Contact Info | No | — |
| Health & Fitness | No | — |
| Financial Info | No | — |
| Location | No | — |
| Sensitive Info | No | — |
| Contacts | No | — |
| User Content | No | Calculation records stored only on-device |
| Browsing History | No | — |
| Usage Data | No | — |
| Diagnostics | No | — |
| Other Data | No | — |