⚠️ Beta software: Fialka is currently in beta. Core cryptography is battle-hardened, but UI and features may change. By downloading you agree to the Terms of Use.
🤖 Android
Latest stable beta
v4.0.2-beta
versionCode 11 · April 2026
Requirements
Android 8.0+ (API 26)
arm64-v8a or x86_64
SHA-256 checksum (v4.0.2-beta APK):
40d458ad5ef571dd07f4dd7ce75a66378fea1dfa89e5aaf7a1ac0be0ec90aad8 Verify on Linux/macOS: sha256sum fialka-v4.0.2-beta.apk
Verify on Windows: certutil -hashfile fialka-v4.0.2-beta.apk SHA256
Install on Android
- 1. Download the APK from GitHub Releases.
- 2. On your Android device, go to Settings → Security → Install unknown apps and allow installation from your file manager or browser.
- 3. Open the downloaded APK file and tap Install.
- 4. On first launch, Fialka will generate your cryptographic identity (BIP-39 24-word seed). Back up your seed phrase securely — it's the only way to restore your account.
- 5. Tor bootstrap takes ~30 seconds on first launch. Once connected, you're ready to share your Account ID with contacts.
🖥️ Desktop (Windows)
Coming Soon
The Windows desktop client is in development. It uses the same Fialka-Core (Rust) cryptographic backend and is byte-for-byte protocol-compatible with the Android app.
Watch for releases on GitHub →🍎 iOS
Planned
iOS support is on the roadmap. Fialka-Core already has a target for aarch64-apple-ios. No timeline yet.
Build from Source
Fialka is fully open source under GPLv3. You can build and verify the APK yourself:
git clone https://github.com/FialkaApp/Fialka-Android cd Fialka-Android ./gradlew assembleRelease
Requires: Android SDK, NDK, Rust toolchain (for Fialka-Core). See README.md for full setup instructions.
📬 Fialka Mailbox (Self-hosted)
Deploy your own encrypted store-and-forward relay over Tor. Owner/member access control, 7-day TTL, and onion key protection with TPM 2.0 or passphrase.
One-line installer (Linux / RPi):
curl -fsSL https://raw.githubusercontent.com/FialkaApp/fialka-mailbox/main/deploy/install.sh | sudo bash
Repository: github.com/FialkaApp/fialka-mailbox