Privacy Policy

Last updated: March 2026

1. Overview

Red Grid Link ("the App") is built with a privacy-first, offline-first architecture. We do not collect, transmit, or store any personal data on external servers. Your location data, session history, waypoints, and configuration remain entirely on your device.

2. Data We Do Not Collect

We do not collect:

GPS or location data
Personal information (name, email, phone)
Device identifiers for tracking
Usage analytics or behavioral data
Contacts, photos, or other device content

The App has no user accounts, no login, and no cloud sync.

3. Field Link Peer-to-Peer Data

When you use the Field Link feature, position data is shared directly between nearby devices via Bluetooth Low Energy and WiFi Direct. This data:

Is encrypted with AES-256-GCM
Travels only between devices in the same session
Is never sent to any server
Is not retained on peer devices after the session ends

Session keys are generated via ECDH P-256 key exchange and are ephemeral — they exist only for the duration of a session.

4. Local Storage

The App stores the following data locally on your device:

App settings and preferences
Saved waypoints
Session history
Downloaded offline map tiles
Subscription entitlement status

All local data can be cleared by uninstalling the App.

5. Crash Reporting

In release builds, the App uses Sentry for crash reporting to help us fix bugs. Crash reports:

Do not include location data (stripped before sending)
Do not include personal information
Contain only technical stack traces and device model info
Are used solely for stability improvements

6. In-App Purchases

Subscription and purchase transactions are processed entirely by the Apple App Store or Google Play Store. We do not have access to your payment information. Subscription management is handled through your store account settings.

7. Third-Party Services

The App uses OpenStreetMap and OpenTopoMap for map tiles when in online mode. These services may log standard HTTP request data (IP address, tile coordinates). Offline map tiles, once downloaded, require no network connection.

We do not embed any third-party advertising, analytics, or social media SDKs.

8. Children's Privacy

The App is not directed at children under 13. We do not knowingly collect any information from children.

9. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be reflected in the App with an updated date. Continued use of the App after changes constitutes acceptance of the revised policy.

10. Contact

If you have questions about this Privacy Policy, contact us at support@redgridlink.com.