NEW RELEASE
Version 2.2.0 is here: If you have SVXLINK networks that you would like to make public, please provide the name, address, port, default TG, and API (dashboard). It will be included in the official QSOLink list and will be downloadable via the app through a simple update.
MAJOR UPDATE

QSOLink BASIC 2.0

Full DMR, Universal AMBE3000 Support & Ultimate PoC Integration!

HYTERA P50 & P50 PRO FULLY SUPPORTED

Experience 100% hardware control! Navigate menus, input data, configure settings, and switch channels entirely using the physical D-Pad. No touch screen required!

We are thrilled to announce a massive breakthrough for the BASIC Edition: QSOLink now natively supports DMR Networks!

Out of the box, the app defaults to a streamlined SVXLINK (FM) experience. To cross the bridge into the digital realm, simply activate the DMR feature in the settings menu and configure your AMBE source.

Ultimate AMBE3000 Flexibility!

To guarantee authentic digital voice quality without heavy software processing, QSOLink 2.0 offers full compatibility with AMBE3000 hardware vocoders. You can use it in two ways:

1. Direct OTG: Plug a USB dongle (ThumbDV, etc.) directly into your device.
2. Remote Server: Connect to your personal AMBED server running on a Raspberry Pi at home (via IP or DNS hostname).

All Android 9+ Devices (32-bit & 64-bit)
Smartphones & PoC Radios (UI auto-adapts to 2.4" screens!)
QSOLink Basic DMR Interface
  • Unlockable DMR: Pure SVXLink by default. Enable DMR in settings to access worldwide digital networks.
  • Full D-Pad Mastery: Perfectly mapped for physical keypads. Control everything without touching the screen.
  • Adaptive Interface: Flawless display on both large smartphones and compact 2.4" PoC screens.
  • Dual Audio DSPs: Dedicated TX & RX Digital Signal Processing in DMR mode for crystal-clear audio.
  • Remote & USB AMBE: Connect to your personal AMBE Server (DNS/IP) or use Direct USB OTG dongles.
  • Universal Package: A single APK spanning across all 32-bit and 64-bit Android architectures.
  • Smart PTT: Advanced Bluetooth BLE/SPP & HID device management.

IMPORTANT UPGRADE INSTRUCTIONS (from v1.0)

There is a known conflict when overwriting older v1.0 releases with v2.0.
If you install v2.0 and do NOT see the "ENABLE DMR PROTOCOL" toggle in your settings menu, you are experiencing this conflict.

To upgrade safely without losing your data, follow these exact steps:
1. Open QSOLink v1.0 and make a Manual Backup of your data.
2. Go to your Android System Settings, select QSOLink, and Clear Cache & Data.
3. Uninstall version 1.0 completely from your device.
4. Install the new version 2.0 APK.
5. Use the Restore button in the settings to bring your data back.

V2.0 IS CURRENTLY IN BETA TEST

Please keep in mind that QSOLink Basic 2.0 is an active work in progress. You may encounter a few bugs here and there, which are being fixed continuously as feedback comes in.

IMPORTANT: Before asking any questions, please make sure to read the official Setup Manual (PDF) carefully.

Don't hesitate to join our Telegram Group to share your remarks, report issues, and help perfect the app!

Download QSOLink Basic (Latest & Legacy)

Download v2.0 Universal APK
Android 9+ (DMR Support) Read Documentation
Official Setup Manual (PDF) Download Legacy v1.0 (32-bit)
Original version (FM only, No DMR) Download Legacy v1.0 (64-bit)
Original version (FM only, No DMR)

Note: AMBE3000 functionality requires either a compatible USB OTG adapter + hardware dongle, or access to a remote AMBED Server.

PMRx Icon

PMRX — The next lightweight evolution for amateur radio users. No license required — just respect and good communication.

Discover the standalone project dedicated to performance. PMRx is an ultra-minimalist SvxLink client engineered for legacy hardware and 2.4" terminals. No clutter, just the radio.

VISIT PMRX PROJECT

Important: Access Credentials

QSOLink is a Radio Client. It does not provide network access credentials (Callsign/Password). To use the app, you must obtain these directly from the sysops or administrators of the SvxLink networks you wish to join.

Join our Telegram community for info on available networks: t.me/t_qsolink

QLINK HamRadio Official Network: NOW LIVE!

The official QSOLink infrastructure is ready. We are opening access to the QLINK Network for all radio enthusiasts who want a high-performance, mobile-optimized SvxLink experience.

High-speed backbone, native MQTT monitoring, and global TG coverage included.

QSOLink Logo

The Ultimate SvxLink Client
For Smartphones & POCs.

145.500 QSO.link MHz

Forget the old dial! We no longer say 145.500 MHz, but QSO.link MHz.


Whether you use a high-end flagship or a rugged POC handset (the kind that looks like a 90s brick and could probably survive a tank), QSOLink is your professional gateway to SvxLink networks.


It runs on almost anything. As long as it has Android 9 or higher, it's a radio! (We decided Android 8 was just too "vintage", even for us).

Download Now Fund the Network

* Certified compatible with Android 9.0+. Tested on top-tier flagships and "brave" low-cost POC hardware.

QSOLink App Interface
Expert Mic
Opus Wideband
WebSDR Ready
APRS-IS Link

Client-Side Architecture

QSOLink is a dedicated Svxlink Client for Android. It is not a standalone radio network. Users are required to configure the app to connect to their preferred third-party reflectors. Coming Soon: We are currently building the official QSOLink Network to provide our own high-speed infrastructure.

Quick Start Guide

Follow these steps to correctly configure QSOLink on your Android terminal.

01 Installation & Permissions

Upon first launch, Android will request several access rights. Accepting all permissions is vital for the radio engine and configuration management.

Required Permissions:
  • All Files Access: Required to create the /Download/QSOLink folder. This is used to save and import your settings, allowing you to transfer your configuration to another phone easily.
  • Notifications: This is a technical requirement only. The app does not send alerts or ads; it uses this to keep the audio engine running in the background. If denied, audio will cut out as soon as the screen turns off.
  • Microphone: Essential for transmitting (PTT).
  • Location: Used for GPS Locator and APRS beacons.
  • Nearby Devices: Required for Bluetooth mics and PTT buttons.

Tutorial: Permissions Setup

02 Simple UI (Recommended)

By default, QSOLink starts in Expert Mode. For POC devices with small 2.4" screens or for safe driving, we recommend the Simple UI.

  • Tap the Settings (Gear icon).
  • Go to Display & Layout.
  • Toggle "Use Navigation Menu" to ON.
  • Tap OK: The app will switch to a large, easy-to-tap tabbed interface.

Tutorial: Switching to Simple UI

03 Network & MQTT Setup

Define your SvxLink Reflector and activity monitor to see who is on the air.

  • Reflector: Long-press an [EMPTY] slot. Enter Host, Callsign, and Password.
  • Live Monitor: Enable "MQTT Live Monitor" in the editor. Choose a server to see real-time talkers on your dashboard.
  • Connect: Short-press the configured button to join the network.

Tutorial: Configuring Networks

04 Audio & Backup Management

Configure your audio DSP and secure your settings for portability.

  • Audio DSP: Calibrate your Mic Gain. Ensure your Gate (Yellow line) is always above the ambient noise (Purple line).
  • Backup: Go to Data & Backup. Use "Export All" to save your configuration to /Download/QSOLink.
  • Transfer: Copy the files from this folder to another phone's Download directory and use "Restore" to clone your setup instantly.

Tutorial: Audio & Configuration Transfer

DSP Screen

Expert Audio Engine

16kHz Wideband digital processing for absolute radio clarity.

  • Advanced Noise Reduction Real-time ambient noise filtering for a perfect modulation.
  • Compressor & Auto-Gate Intelligent automatic squelch and built-in DX profiles (Punch, eSSB).
  • 6-Band Parametric EQ Full equalizer to adapt your voice timbre to any microphone.

WebSDR Native Console

Control remote receivers with the ergonomics of a real HF base station.

  • Digital Tuning Wheel & Dual VFO Precise frequency adjustment to the kHz and VFO A/B management.
  • DX Cluster & Scanner Real-time DX spot importation and automatic jumping to active frequencies.
  • Multi-Mode All-Bands Full support for LSB, USB, AM, FM, and CW with adjustable bandwidth filters.
WebSDR Screen
Scanner Screen

Intelligent Scanning

A network scanner that adapts to your operating style.

  • Auto-Switch (Jump) Automatically switch to the active TalkGroup based on your priorities.
  • Visual Radar Visualize station activity on a dynamic orbit around the TG.
System Screen

Ultimate Car Mode HUD

Designed for safety and performance behind the wheel.

  • Smart Steering Control Use your steering wheel buttons or Bluetooth microphone to control the app.
  • Bluetooth Metadata Displays callsigns and S-meter levels directly on your car's dashboard.

APRS-IS Messaging

ADVANCED FEATURE

Full integration with the global APRS-IS network for tracking and text communication.

  • Global Tracking Broadcast your position and network status (TG/Host) on maps like aprs.fi.
  • Direct Messaging Chat Intuitive chat interface to send and receive APRS text messages in real-time.
APRS Screen

Lite Edition POC OPTIMIZED

Dedicated to older smartphones and Network Radio (POC) devices.

  • Resource-Efficient Drastically reduced RAM and CPU usage. Runs smoothly on 32-bit legacy hardware.
  • Simplified UI Clean, high-contrast interface designed specifically for small screens (2.4" to 4" devices).
  • Power Optimized Optimized background processes to maximize battery life on dedicated radio handsets.
Lite UI
POC Device Optimization

POC & Handheld Optimization

Advanced compatibility for SVXLINK Network Radios with 2.4" to 3" small displays.

  • Fullscreen & No-Cover UI Native Android dialogs optimized to prevent the keyboard from covering input fields on small screens.
  • Static Navigation Menu Optional fixed menu for devices where swiping is difficult due to thick rugged screen bezels.
  • Hardware Button Mapping Deep integration for PTT, and Volume buttons
Watch on 2.4" POC Featured video from G0MMM

Your Data, Your Log

Backup

Full JSON Backup

Save all your configurations, TGs, and identities in a single exportable file. export debug log for dev team

QSY

Identity Cards

Automatically fetch station photos and details from QRZ.com and HamQTH.

Logbook

ADIF Logbook

Standard export of your radio contacts for your favorite logging software.

Community

Telegram Logo

Support Group

@QSOLink

OPEN TELEGRAM Discord Logo

Discord Server

Technical support and community lounge.

JOIN SERVER

WebSdr Bordeaux

WebSdr Bordeaux

Hosting & Infrastructure Provider.

Repeater F6ZCF

F6ZCF Link

News & Coverage maps.

Hotspot Shop

Hotspot Shop

Get Dedicated Hardware.

Tutorials

Read Documentation for rev 1.5, rev 2.0 coming soon!
New tutorials for V2.1 coming soon!

Project Overview

QSOLink V2.1 walkthrough

Roadmap

Play Store

Submission currently in progress.

Multi-Platform

PC & iOS versions under study.

Accessibility

Support for Visually Impaired users.

CAT Control

Enhanced TRX Control

"Current Status: Coding while drinking too much coffee! 😅"

Get on Air

Latest Release: V2.2.0 Stable (expert)

EXPERT EDITION (V2.2.0)

Full Features & Advanced DSP

64-bit (ARMv8) 32-bit (ARMv7)

LITE EDITION (V2.0.0)

Low RAM & Simplified UI

64-bit (ARMv8) 32-bit (ARMv7)

LITE BETA V2.1.1

Experimental branch - Test the latest improvements

64-bit Beta (v8) 32-bit Beta (v7)

Station Resources

Download the official icon pack for your Callbook (Flags & Station types).

Callbook Icons Pack (.zip)

Extract to: /Download/QSOLink/Pictures/

Legacy Version V1.5.0 :

V1.5 (64-bit) V1.5 (32-bit)

⚠️ Xiaomi/Samsung: Set battery saver to "No Restrictions".

Support the Fun

This project is a hobby. Buy me a coffee to keep the servers running!

Buy me a coffee on Ko-fi