Nitro Messenger

Post-quantum E2EE chat & calls

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Private by design. Your messages, calls and media are end-to-end encrypted — the server is a blind carrier and cannot read them. Nitro is a private messenger built on a simple promise: the server cannot read your messages. Content is end-to-end encrypted with a post-quantum hybrid ratchet, so your conversations stay yours — even against tomorrow's computers. WHY NITRO • End-to-end encrypted messages, calls and media — keys live only on your device. • Post-quantum hybrid encryption, not just classic crypto. • The server is a "dumb carrier": it routes opaque, encrypted envelopes and never sees content. • No ads. No trackers. No third-party analytics. Your address book is never uploaded. • Your identity is a @username — your phone number is never shown to anyone. FEATURES • 1:1 chat with delivery receipts. • Photo sharing — images are encrypted on-device before they ever leave. • Voice & video calls with the native call experience (CallKit). • Group chats. • On-device, encrypted history — losing the server never loses your messages. • App lock with Face ID. PRIVACY YOU CAN VERIFY Every chat shows an encryption indicator, and you can confirm a contact face-to-face with a safety number. Delete your account anytime from Settings — your identity and history are wiped from the device. Nitro is single-device by design: no desktop or multi-device surface to attack.

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What's new in 1.2.1: Calls, upgraded: • Callers now see "Ringing…" the moment your contact's phone rings • Busy and declined calls are finally honest — no more guessing why a call ended • Minimize a call and keep using the app; a floating bar brings you back • The screen turns off against your ear during voice calls • Mute from the lock screen or CarPlay now actually mutes • Clearer call history: repeat calls group together, timers show hours Chat, steadier: • No more jumps — reading old messages is never yanked to the bottom • A jump-to-latest button with a new-message counter • Photos keep their exact size while loading — no more shifting bubbles • Read receipts update live while the chat is open • Reply by swiping a message; date headers keep long chats organized Notifications, finally like they should be: • See the sender and the message itself (decrypted only on your device — you can turn previews off) • Reply and mark-as-read straight from the notification • Tapping a notification opens the right conversation • Grouped neatly per chat, no more duplicate banners Sharper media: • Crisper photo and video previews in chat • Voice notes show a real waveform — drag to seek, play at 1.5x or 2x • Media you've opened once now opens instantly, even offline Every message, call, and file stays end-to-end encrypted with post-quantum cryptography.

The developer, MERT GOLCU, 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 Not Collected

    The developer does not collect any data from this app.

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

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • MERT GOLCU
    Size
    • 25.5 MB
    Category
    • Social Networking
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    16+
    Copyright
    • © 2026 Mert Golcu