# Zero Secure Messenger — Secure messaging & calls.

> Secure messaging & calls. (iPhone/iPad app by Vault Management.)

- Source: https://appshunter.io/ios/app/zero-secure-messenger/id6756901115 (this page in markdown: same URL + `.md`)
- Developer: [Vault Management](https://appshunter.io/developer/1599501113)
- Category: Social Networking
- Price: Free
- Age rating: 17+
- Requires: iOS 17.6 · 43 MB
- Languages: Dutch, English, French, German, Portuguese, Spanish
- Released: 2026-01-28
- Data updated: 2026-06-30
- User reviews in markdown: https://appshunter.io/ios/app/zero-secure-messenger/id6756901115/reviews.md

## What is Zero Secure Messenger?

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.


## Version history (last 5 releases)

### 1.1.0 — 2026-06-29

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.

### 1.0.9 — 2026-06-18

What's New:

New languages
Zero is now available in Spanish, French, German, Portuguese, and Dutch, alongside English. The interface, settings, chats, calls, and the secure vault are translated, and your language is selected automatically based on your device settings.

Bug fixes and performance improvements.

### 1.0.8 — 2026-05-10

This release focuses on reliability around encryption recovery, identity verification, and a cleaner first-launch experience.

What's new

— Auto-recovery when a contact reinstalls. Your messages now retry against the new session automatically — up to ten recent in-flight messages are resent once the secure channel rebuilds, so you no longer need to send a new message just to restart the conversation.

— Identity-change banner. If a contact's encryption identity changes (for example, after a reinstall on their side), Zero now shows a clear banner in the chat. Tap it to compare the old and new safety numbers side-by-side and explicitly accept or reject the change instead of silently trusting the new key.

— Cleaner reinstall. Reinstalling Zero now starts you with an empty chat list. New conversations appear as messages come in, the same way Android works.

— Friendlier placeholder for messages that can't be decrypted, instead of empty bubbles.

Security

— Removed a legacy encryption fallback that could expose messages to a key derivable from public information. Every message is now end-to-end encrypted via Signal Protocol with no exception path.

— Crypto errors that were previously silent are now logged for diagnosis, so future issues can be tracked down faster.

Fixed

— An issue causing some users to be logged out unexpectedly during normal app use.

As always, no message content, no metadata, no logs, and no telemetry leave your device unencrypted.

### 1.0.3 — 2026-03-04

NEW FEATURES

- Message Forwarding - Forward messages to any contact or group
- Starred Messages - Save important messages for quick access, tap to jump directly to them in chat
- Draft Auto-Save - Never lose unsent messages, automatically saved and restored
- Contact Card Sharing - Share contacts within Zero or via system share
- Call Reminder - Set a reminder to call back when declining incoming calls
- Custom Decline Message - Send a personalized message when declining calls
- Swipe-to-reply — Swipe any message to quote-reply instantly
- Link previews — URLs now show rich preview cards with image, title, and description
- Message retry — Tap failed messages to re-send with one touch
- Renewed Typing indicators — See when someone is typing in real time
- Image compression — Photos send faster and use less data without visible quality loss
- Swipe actions on chat list — Swipe to pin, mute, or delete conversations
- Multi-select — Long-press to select and bulk-delete conversations
- Scroll-to-bottom button — Quickly jump back to latest messages
- Haptic feedback — Tactile response across all key interactions
- Shimmer loading — Smooth loading animations for media
- Vault access while expired — Access your vault even if your subscription lapses

IMPROVEMENTS

- Share group member contact cards with long-press
- Star and draft indicators in chat and conversation list
- Enhanced privacy controls for Hidden ID users
- Forwarded message labels
- Improved message action menu
- Bug fixes and performance improvements

### 1.0.2 — 2026-02-05

What's New in Version 1.0.2
New FAQ Section

Comprehensive FAQ added to Settings with answers to common questions
Covers Getting Started, Messaging, Calls, Security, Account, and Troubleshooting

Improved Contact Management

Contact names now display correctly everywhere (was showing ZeroID in some places)
Deleting a contact now removes them for both users
Chat conversations properly clear when you delete a contact

Notification Fixes

Fixed duplicate notifications for contact requests
Notifications now show contact names instead of IDs

Encryption Improvements

Faster secure session setup when adding new contacts
Better recovery after app reinstall

Bug Fixes & Stability

General performance improvements
Various bug fixes

## More apps by Vault Management

- [ZeroConnect](https://appshunter.io/ios/app/zeroconnect/id6758057137)
- [ZeroVault](https://appshunter.io/ios/app/zerovault/id6758253926)
- [ZeroAdmin](https://appshunter.io/ios/app/zeroadmin/id6758728167)
- [ZeroSecret](https://appshunter.io/ios/app/zerosecret/id6760924190)

All apps by Vault Management: https://appshunter.io/developer/1599501113

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-30.*