Q-Audion

Encrypted Calls & Chat E2E

Free

End-to-end encrypted calls and messages with post-quantum key exchange. The server only relays ciphertext, never plaintext. Q-Audion is an end-to-end encrypted communication app for voice calls, video calls, and text messaging. Every conversation is protected by a hybrid handshake combining classical cryptography (X25519) and post-quantum cryptography (ML-KEM), so your communications stay secure even against future quantum computers. Content is encrypted with AES-256-GCM and XChaCha20-Poly1305: only you and your contact can read it, never the server. Key features: — End-to-end encrypted voice and video calls — Text messaging with encrypted delivery — Hybrid post-quantum key exchange (ML-KEM + X25519) — Contact identity verification via security fingerprint — Encrypted file attachments and voice notes — Block and report contacts directly in the app — Optional Bluetooth mesh: with no network, messages that are already encrypted can pass between nearby Q-Audion phones, only with your consent Q-Audion is built for people who want to communicate without compromising on privacy: the server only relays ciphertext, never plaintext, and does not store your phone number or email in the clear. Registration is by invitation: an invite code is required, with a phone number (SMS code), or with an extension and email without a phone number. No ads, no in-app purchases.

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The developer, PAVEL IVANOV, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • Contacts
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer indicated that this app supports the following accessibility features. Learn More

  • Supported Features

    • Dark Interface

Information

Seller
PAVEL IVANOV
Size
105.2 MB
Category
Social Networking
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • iPad
    Requires iPadOS 16.0 or later.
Languages
English and 5 more
  • English, French, German, Italian, Portuguese, Spanish
Age Rating
4+
Copyright
© 2026 Q-Audion
  • Developer Website
  • Privacy Policy

    • Supports

    • Siri

      Use this app with Siri to help you get things done.