Decentralized peer-to-peer secure messaging LXMF client

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Antivirus & safety scan results

Scan Date: Oct 2, 2026 Software Version: 2.2.0

Status: ✅ Trusted & Safe to install This app is signed by markqvist with trusted and verified digital signature and it will updated existing Sideband installations Certificate fingerprint: 4ab9269c320c72f4e4057ec7ea5acade320c2a48 Issuer: C=IO, ST=Unknown, L=Unknown, O=Unknown, OU=Unknown, CN=Sideband Development How we verify APK files security

Android antivirus Status

K7GW Clean ✅

DrWeb Clean ✅

VirIT Clean ✅

ClamAV Clean ✅

Google Clean ✅

Ikarus Clean ✅

Lionic Clean ✅

Sophos Clean ✅

Yandex Clean ✅

Alibaba Clean ✅

Tencent Clean ✅

Xcitium Clean ✅

Fortinet Clean ✅

Kingsoft Clean ✅

Symantec Clean ✅

AhnLab-V3 Clean ✅

Kaspersky Clean ✅

Microsoft Clean ✅

Trustlook Clean ✅

ESET-NOD32 Clean ✅

Avast-Mobile Clean ✅

NANO-Antivirus Clean ✅

BitDefenderFalx Clean ✅

Sideband Encrypted Messaging app for Android description

Sideband is a LXMF client for Android allowing you to communicate with people or LXMF-compatible systems over Reticulum networks using LoRa, Packet Radio, WiFi, I2P, or anything else Reticulum supports.

Sideband is completely free, permission-less, anonymous and infrastructure-less. Sideband uses the peer-to-peer and distributed messaging system LXMF. There is no sign-up, no service providers, no "end-user license agreements", no data theft and no surveillance. You own the system.

This also means that Sideband operates differently than what you might be used to. It does not need a connection to a server on the Internet to function, and you do not have an account anywhere. Please read the Guide section included in the program, to get an understanding of how Sideband differs from other messaging systems.

What's new in v2.2.0

Custom Interface Support: Ability to load custom interfaces directly from a configured plugins directory on Android.
Direct Voice Link Establishment: Start half-duplex voice links directly from the conversations screen for easier communication.
PTT Mode Quick Switcher: Added a quick toggle on the messages screen to switch between high-quality and low-bandwidth Push-to-Talk (PTT) modes.
Enhanced Voice and Call Handling: Improved general call management and voice link stability.
Reliable Extreme Link Delivery: Significantly improved message delivery reliability and transmission efficiency across extreme or poor link conditions.
Background Audio Fix: Resolved an Android-specific bug where outgoing audio stopped working if a call was accepted while the app was in or just waking from the background.
Interface and Node Version Details: Added version information to discovered interface details and propagation node announce streams.
Updated Protocol Stacks: Upgraded integrated RNS (1.5.5), LXMF (1.2.0), and LXST (0.5.4) backends for improved core performance.

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Specifications

Package Name	io.unsigned.sideband
Requirements	Android 7.0 (Nougat API 24)
Author	markqvist
APK Size	118.4 MB
Categories	Communication, Encrypted Messaging
Source Code	https://github.com/markqvist/Sideband