Zero Secure Messenger

Zero Secure Messenger

Secure messaging & calls.

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Free

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Details

  • Released
  • Updated
  • January 28, 2026
  • June 29, 2026

Features

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About

Zero Secure Messenger Zero Secure Messenger is a secure communication app built for enterprises and organizations that require private, controlled, and encrypted communication. The app provides end-to-end encrypted messaging, voice and video calls, and secure media sharing, designed to protect identities and sensitive data. Key Features End-to-end encrypted messaging Encrypted voice and video calls Auto-expiring messages with custom timers Encrypted file and media transfers Message controls: reactions, replies, edit, revoke Privacy-preserving user identifiers and group chats Privacy-focused design App lockscreen with PIN or password Secondary access PIN for added security Encrypted internal vault for files, images, videos, and notes Decentralized internal contact list Safety numbers and QR verification Stories for secure internal updates Integration with Zero MDM on iOS In-app content reporting and user blocking Zero Secure Messenger is designed for managed deployments and organizational environments where privacy, security, and control are essential. Users must agree to our End User License Agreement (EULA) which prohibits objectionable content and abusive behavior.
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What's New in Zero Secure Messenger

1.1.0

June 29, 2026

This release focuses on messaging reliability and post-quantum session stability. • Fixed an issue where messages could fail to deliver after deleting and re-adding a contact, or after reinstalling the app. Sessions now recover automatically — no need to log out. • Hardened post-quantum (Kyber) key handling so encryption keys stay consistent across app updates, logins, and device changes. • Improved identity-change recovery: when a contact reinstalls or switches devices, conversations re-establish securely on both the sending and receiving side. • More reliable group chats: correct message timestamps and ordering, plus group push notifications for offline members. • Faster, more dependable chat list updates. • General stability, security, and performance improvements.

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