Curvature: The Ultimate Earth Measurement Toolkit

Built from the ground up. Literally.

Welcome to the all-new Curvature, the most comprehensive tool for exploring, calculating, and documenting earth measurements. We have completely redesigned the app experience—new code, a sleek modern layout, and powerful features designed for researchers, students, and enthusiasts alike.

Whether you are analyzing globe geometry or exploring flat earth models, Curvature provides the advanced formulation and high-precision tools you need to visualize the world around you.

What’s New in Curvature?

### Advanced Earth Calculators

The Curvature Calculator: Our flagship tool now uses advanced formulation for more accurate results. For the first time, see your calculations come to life with a graphic representation of the results.

Quick Horizon Calculator: Instantly find the distance to the horizon based on your height of eye.

Quick Curvature Drop: A streamlined tool for rapid drop-distance results.

Formula Transparency: Access a dedicated section showing the exact formulas used for both globe and flat earth models.

### Redesigned Mapping & POIs

Precision Tools: Utilize the new measurement ruler to calculate distances directly on the map.

Points of Interest (POI): Drop pins on key locations and save them for future reference.

Data Persistence: Powered by SwiftData, your saved measurements, POIs, and calculations are stored securely in organized folders on your device.

### The Knowledge Hub

Expanded PDF Library: A high-performance PDF viewer that allows you to organize research. Pro Feature: You can now import and store your own PDF documents directly within the app.

Categorized Links: An improved card-style layout for web resources. Add your own custom links and categorize them to build your personal research database.

Comprehensive Glossary: A deep dive into the terminology of both globe and flat earth models.

Geographical References: A library of data points and geographical milestones for quick fact-checking.

### All-in-One Utility

Universal Unit Converter: Seamlessly convert between Distance, Speed, Weight, Temperature, Area, Volume, and Time.

Save & Export: Keep a permanent record of your findings with the ability to save every calculation you perform.

Modern. Clean. Accurate. Curvature is more than just a calculator; it’s a portable research laboratory. By providing the tools to calculate "the drop" and visualize the results, we put the power of observation and mathematics in your pocket.

Download Curvature today and start measuring your world.

This whole app has been completely designed from the ground up (literally) - New code, new design, and new layout.

 - Redesigned map with measurement ruler and POI's both with save data persistence.

 - Redesigned earth curvature calculator with more detailed and accurate calculations using advanced formulation. 

 - Earth Curvature calculations now create a graphic representation of the results.

 - Earth curvature calculations can now be saved.

 - Added data persistence (local SwiftData) to save calculations, measurements and POI's are stored within a saved folder.

 - PDF Library with improved PDF viewer and ability to add your own PDF's.

 - Links library with improved card layout and categorisation and ability to add your own links.

 - Added a Quick Horizon Calculator.

 - Added a Quick Curvature Drop Calculator.

 - Added a Unit converter (with distance, Speed, Weight, Temperature, Area, Volume and time) conversions.

 - Added References data showing geographical data points.

 - Added Formulas data showing all formulation used in globe earth and flat earth models.

 - Added Glossary for globe earth and flat earth models.

PRIVACY POLICY

Last Updated: [25 February 2026]

This Privacy Policy explains how [Magnus North] ("we", "us", or "our") handles information when you use the Curvature iOS application ("the App").

Our privacy philosophy is simple: We do not collect, store, or share your personal data.

1. Information Collection and Use

Curvature is designed to function locally on your device. We do not require you to create an account, nor do we collect any personally identifiable information (PII) such as your name, email address, phone number, or device identifiers. No data is transmitted to our servers or any third-party servers.

2. Location Data

The App requests permission to access your device's location services. This data is used strictly locally on your device to display your current location on the map and facilitate distance measurements.

• No Tracking: We do not track your location history.

• No Transmission: Your location data never leaves your device and is not sent to us or any third parties.

• User Control: You can enable or disable location access at any time through your iOS device settings (Settings > Privacy & Security > Location Services > Curvature).

3. App Content and Data Sources

All formulas, calculations, and informational content provided within Curvature have been sourced from public domains, books, and internet research. The App does not monitor your interaction with this content or report your usage patterns back to us.

4. Third-Party Services

Curvature does not use any third-party analytics, tracking frameworks, or advertising SDKs. The App relies solely on Apple's native frameworks (such as MapKit and SwiftData) to function.

5. Children's Privacy

Because we do not collect any personal information, we naturally comply with the Children's Online Privacy Protection Act (COPPA) and similar global regulations. The App is safe for use by children, as no data is gathered from any user, regardless of age.

6. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Since the App collects no personal data, any changes will likely reflect new App features or regulatory requirements. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last Updated" date.

7. Contact Us

If you have any questions or concerns about this Privacy Policy or the Curvature app, please contact us at:

Email: [iosDevelopmentNcl@gmail.com]