Hamfisted

Prepare for the German HAM radio license examGPL-3.0-only

NightDream

Clock, screensaver & radio with dynamic brightness & custom layouts.GPL-3.0-or-later

RF Analyzer (FOSS)

Analyze RF signals on Android with HackRF, RTL-SDR, Airspy and HydraSDR.GPL-2.0-or-later

Loud Bang

RX/TX capable WSPR clientGPL-3.0-only

Atalaya

Monitor and get information from nearby cell phone towers.GPL-3.0-only

Harmony Music

An Android App for streaming MusicGPL-3.0-only

Androidomatic Keyer

Morse code keyerApache-2.0

Botifier

Send notifications via BluetoothBSD-2-Clause

WebSDR client

OnlineSDR receiverGPL-3.0-only

Privacy Cell

Verify that a phone is using the most secure cell protocols.GPL-3.0-or-later

Tempo

An open-source and lightweight music client for SubsonicGPL-3.0-only

WiFi Automatic

Turn off Wi-Fi automaticallyApache-2.0

SysLog

Capture log filesGPL-2.0-or-later

PrepApp (F-Droid)

Preparedness toolkit, survival guide, emergency info, weather and more.MIT

Rivia

Rivia is the ultimate encryption toolMIT

Dahdidahdit — The Morse Trainer

An Actual Morse Code Trainer — Not Just A Morse Code GeneratorGPL-3.0-only

HOPE_16

Program app for the HOPE conferenceApache-2.0

Valentin's PowerTools #016 - Tomato Potato Clock

Distraction-free pomodoro timerGPL-3.0-only

XRCB app

Listen to the radios of the Xarxa de Radios Comunitarias de Barcelona, live!GPL-3.0-only

WREK Online

Listen to WREK Atlanta 91.1 FMApache-2.0