Cyber Phone Source

Effective date

Privacy Policy

Effective March 4, 2026

This policy describes how Cyber Phone handles information when you use the app. Cyber Phone is designed to keep core communications data on the device unless you explicitly use a feature that requires network communication or export data yourself.

1. Who this policy covers

This policy applies to the Cyber Phone Android application published from the Cyber Phone project repository and related official release channels.

2. Data stored on your device

Depending on which features you enable, Cyber Phone may store the following locally on your device:

  • contacts and contact-linked metadata
  • call history and call-related state
  • SMS, MMS, and local message thread metadata
  • mesh messaging and mesh calling state
  • wallet settings, addresses, invoices, and transaction-related metadata
  • app preferences, feature toggles, and diagnostics shown to you inside the app

This local data is used to provide the app’s core functionality. It is not uploaded by default simply because it exists on your device.

3. Data sent over networks

Cyber Phone can communicate over networks only when required by the feature you use.

  • Standard calling and SMS/MMS use the Android telephony stack and your mobile carrier.
  • Mesh features can exchange data directly with nearby devices and, where enabled, route traffic through other participating devices.
  • Optional AI spam filtering can download model files used for local spam classification. After download, that model runs on your device rather than requiring every spam check to be sent to a remote service.
  • Optional YACB reputation features can download reputation data and, when you use reputation-sharing features, send YACB reputation requests or shared signals needed for those checks.
  • Wallet features can contact blockchain, Lightning, or federation infrastructure needed to complete user-requested payment operations.
  • Opening external links from the app (for example project pages) sends you to the chosen external service.

When a remote service is contacted, that service may receive information such as your IP address, request timestamps, and request payloads needed to complete the operation. Those network disclosures are a function of the selected service and the feature you invoked.

4. Permissions

Cyber Phone may request permissions that correspond directly to its feature set, including:

  • contacts
  • phone and call-related permissions
  • SMS and MMS permissions
  • microphone and camera permissions
  • Bluetooth, nearby device, Wi-Fi, and location-related permissions for mesh discovery and connectivity
  • notification permissions

Permissions are used to provide the feature that depends on them. If you deny a permission, the related feature may be limited or unavailable.

5. Analytics, advertising, and sale of data

Cyber Phone is not designed around advertising networks and does not intentionally include third-party advertising SDKs. The project also does not intentionally include third-party analytics SDKs for behavioral tracking.

Cyber Phone does not sell your personal data.

6. Optional wallet and federation features

Wallet features are optional. If you use them, Cyber Phone may communicate with external systems required for on-chain or Lightning activity, including user-selected or app-configured services such as federation endpoints, explorers, or payment infrastructure.

Those services operate independently and may have their own privacy practices. You should review the privacy and operational assumptions of any external payment or federation service you choose to use.

7. Data retention and deletion

Data stored by Cyber Phone generally remains on your device until you delete it, clear app storage, uninstall the app, or overwrite it through normal use. If you export, back up, or share data yourself, that copy is controlled by the destination you choose.

8. Security

Cyber Phone is built with a local-first posture and attempts to limit unnecessary external data flows. No mobile app can guarantee perfect security. You remain responsible for device security, operating system integrity, and the trustworthiness of any remote service you choose to use.

9. Children

Cyber Phone is not specifically directed to children. If you are responsible for a child using the app, you are responsible for supervising how communication, network, and wallet features are used.

10. Changes to this policy

This policy may be updated as the app changes. When it is updated, the effective date at the top of this page will be revised.

11. Contact

For privacy-related questions about Cyber Phone, use the project issue tracker: https://github.com/ariadne-coil/Cyber-Phone/issues