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Get Zemzeme
Free & Open Source

No account required. No sign-up. Just download and go.

Latest: v1.0.2 Released: February 2026 Requires: Android 8.0+ Size: ~55 MB Stable
Android

Choose Your Download Method

All three options install the same app. Choose based on your trust model and update preferences.

Download from Website

Recommended

Direct APK hosted on zemzeme.app. No account, no app store — just download and install. Works on all Android devices running Android 8.0 or later.

Note: Enable "Install unknown apps" in Android Settings → Apps → Special app access for your browser or file manager.
⬇ Download Universal APK
⬇

GitHub APK

Open Source

Direct APK from GitHub Releases. The fastest way to get the latest version. Verify the SHA-256 checksum after download. No Google account required.

Note: Enable "Install unknown apps" in Android Settings → Security for your browser or file manager.
⬇ Download APK from GitHub View all releases & SHA-256 checksums →
📦

F-Droid

Submission Pending

F-Droid independently builds the APK from our open-source code, providing verification that the binary matches the source. No Google account needed. Gold standard for open-source Android apps.

Note: F-Droid submission is under review. Available once approved.
📦 Visit F-Droid
▶

Google Play

Coming Soon

For users who prefer automatic updates through Google Play Store. Note: Play Store builds may lag behind GitHub releases due to review cycles. Requires a Google account.

Get it on Google Play Coming Soon
Install Guide

Installing the APK

Installing the GitHub APK takes about 2 minutes.

1

Download the APK

Go to github.com/whisperbit-labs/zemzeme-android/releases and download the latest zemzeme-v1.0.2.apk.

2

Enable installation from unknown sources

Go to Settings → Apps → Special App Access → Install Unknown Apps and allow your browser or file manager.

3

Open the downloaded APK

Tap the APK in your downloads. Android will show an install confirmation dialog.

4

Grant permissions

Bluetooth (Bluetooth) and optionally location (required by Android to scan Bluetooth devices). Internet for internet connections transport only.

5

You're done - no account needed

Zemzeme generates your Curve25519 keypair locally on first launch. No registration. No sign-up. Start messaging immediately.

Security

Verify Your Download

Always verify the SHA-256 checksum to confirm your APK hasn't been tampered with.

Checksums for every release are on the GitHub Releases page.

Linux / macOS
sha256sum zemzeme-v1.0.2.apk
Windows (PowerShell)
Get-FileHash zemzeme-v1.0.2.apk -Algorithm SHA256
Requirements

Android Requirements

→ Android 8.0 (API 26) or higher
→ Bluetooth 4.0 for nearby messaging
→ Internet optional (P2P & relay transport)
→ ~55 MB storage
→ No Google account required
Coming Soon

Zemzeme for iOS

An iOS and iPadOS client is in development with full encryption parity. Bluetooth support is subject to Apple's CoreBluetooth API constraints.

Download on the App Store - coming soon Coming Soon

Follow on GitHub for release notifications.

iOS Roadmap

What to Expect

🔐

Full Encryption Parity

Same Noise Protocol, Curve25519 key exchange, and ChaCha20-Poly1305 as Android.

🌐

P2P + Nostr Transport

libp2p and online relay transports on day one. Bluetooth subject to CoreBluetooth API support.

🤖

Cross-Platform Messaging

iOS users will communicate seamlessly with Android and Desktop users on the same network.

Want to help? We're looking for iOS developers (Swift / SwiftUI) to help build the iOS client. Open a GitHub Discussion if you're interested in contributing.
In Development

Zemzeme for Desktop

A desktop client for macOS, Windows, and Linux - with full internet connections transport, a keyboard-optimised interface, and the same zero-account architecture.

macOS
Windows
Linux

Follow on GitHub for release notifications.

Desktop Roadmap

What to Expect

⌨️

Keyboard-First UI

Designed for power users. Full keyboard navigation, command palette, and multi-window support.

🌐

P2P + Nostr

libp2p direct connections and online relay transport from day one. Same encryption as Android.

🤝

Cross-Platform Compatible

Desktop users share the same network as Android (and iOS). Message across all platforms.

Want to help? We're looking for contributors experienced with Kotlin Multiplatform or Electron to help build the desktop client. Join the discussion on GitHub.
Open Source

Build From Source

Don't trust our binary? Build your own from the verified open-source code. Full build instructions are in the repository README.

View Source on GitHub → Build Instructions

Download Now.
No Account. No Server. No Compromise.

Free and open source. Always.

⬇ Download v1.0.2 APK