Tyr - P2P Email
True peer-to-peer email using Yggdrasil network. No central servers required.
| AppID: | com.jbselfcompany.tyr |
| Author: | JB-SelfCompany |
| License: | AGPL-3.0-only |
| InRepoSince: | 2025-11-27 |
| LastRepoUpdate: | 2025-11-30 |
| LastAppUpdate: | 2025-11-30 |
| LastVersion: | 1.4.2 |
| Categories: | Internet |
| APK source: | Github |
| Google Play: | Check if it's there |
Tyr is a revolutionary Android application that provides true peer-to-peer email communication using the Yggdrasil mesh network. Unlike traditional email systems that rely on centralized servers, Tyr runs a complete email server directly on your device.
Key Features:
- True P2P Email - No central servers, no cloud infrastructure. Your device IS the email server.
- Yggdrasil Integration - Built on the Yggdrasil overlay mesh network providing secure, end-to-end encrypted connections.
- Standard Protocols - Exposes SMTP/IMAP protocols on localhost, compatible with standard email clients like DeltaChat.
- Privacy First - All data stays on your device. Encrypted configuration backup with AES-256-GCM encryption.
- DeltaChat Ready - Seamless integration with DeltaChat for instant messaging over email.
- Cryptographic Identity - Your email address is derived from your Ed25519 public key, ensuring authenticity.
- Mesh Networking - Connect via public Yggdrasil peers or configure your own custom peers.
- Battery Optimized - Sophisticated power management with timed wake locks and network monitoring.
- Secure by Design - Password protection using Android Keystore with EncryptedSharedPreferences.
- Backup & Restore - Export and import all settings with optional inclusion of your cryptographic keys.
Technical Details:
The app runs a foreground service that manages the native Yggmail library (Go-based), providing SMTP on port 1025 and IMAP on port 1143 (localhost only). Your mail address format is: <64-hex-characters>@yggmail, cryptographically derived from your Ed25519 key pair.
Perfect For:
- Privacy enthusiasts who want control over their communications
- Users seeking decentralized alternatives to traditional email
- DeltaChat users wanting P2P messaging infrastructure
- Anyone interested in mesh networking technology
Requirements:
- Android 6.0 (API 23) or higher
- Internet connection for initial Yggdrasil peer connections
- Battery optimization exemption recommended for best performance
Join the peer-to-peer email revolution with Tyr.
While you can download the APKs here directly, you should preferably use an F-Droid client so the app stays up-to-date on your device. Some clients have this repo enabled by default, e.g. Neo Store, Droid-ify, or, of course, the IzzyOnDroid client by Sunil. With others (like the official client) you'll have to add this repo manually (see the hint on top of the package list for how to do that).
