Privacy Policy

Last Updated: February 2026

Summary: LumiCalc does not collect, store, or transmit any personal information. All data is stored locally on your device only.

1. Introduction

LumiCalc ("we," "our," or "us") respects your privacy and is committed to protecting your personal information. This Privacy Policy explains how we handle information when you use our mobile application ("App").

2. Information We Do NOT Collect

LumiCalc is designed with privacy in mind. We do NOT collect:

Personal identification information (name, email, phone number, etc.)
Location data
Device identifiers
Usage analytics or tracking data
Any data that can identify you personally

3. Local Data Storage

What Data is Stored Locally

The following data is stored only on your device:

App Settings: Your calculator preferences, theme selections, and customization options
Keyboard Themes: Custom themes you create or select from the library
Backlight Settings: Your backlight color and intensity preferences
Sound and Haptic Settings: Your feedback preferences

App Group Data Sharing

LumiCalc uses Apple's App Group feature to share data between the main app and the keyboard extension. This sharing occurs only on your device and allows the keyboard extension to access your selected themes and settings to be synchronized between the app and keyboard. This data never leaves your device and is not accessible to us or any third parties.

4. Subscription Services

If you choose to subscribe to premium features, we use Apple's In-App Purchase system:

All subscription transactions are processed by Apple
We do not have access to your payment information
Subscription status is managed through your Apple ID
You can manage your subscription through: Settings > [Your Name] > Subscriptions

Apple may collect certain information as part of the transaction process, which is governed by Apple's Privacy Policy.

5. Third-Party Services

LumiCalc does not use any third-party analytics, advertising, or tracking services. We do not integrate with any services that collect or transmit your data.

6. Data Security

Because all data is stored locally on your device, your data is protected by your device's security features (passcode, Face ID, Touch ID, etc.). We do not transmit any of your app data over the internet, and there is no server-side storage of your personal data.

7. Children's Privacy

LumiCalc does not knowingly collect information from children under 13. The App is suitable for all ages and does not require any personal information to function.

8. Your Rights

You have full control over your data:

Delete All Data: Uninstall the App from your device
Modify Settings: All settings can be changed or reset within the App
We do not collect data, so there is nothing to request access to or port.

9. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last Updated" date. We encourage you to review this policy periodically. If we make significant changes, we will notify you through the App or by other means.

10. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:

Email: artenook@outlook.com

We aim to respond within 24–48 hours.

11. Consent

By using LumiCalc, you consent to this Privacy Policy. If you do not agree with this policy, please do not use our App.