Turn your Android phone into Amateur Radio HF/VHF/UHF APRS enabled Codec2/OPUS DV (digital voice) and/or FreeDV handheld transceiver. The goal of this project is to promote usage, experimentation and development of open source DV codecs and open source DV transceiver solutions in Amateur and Citizen radio. Requires additional hardware (e.g. AFSK/LoRa/FSK), software (e.g. Direwolf) radio modem or analog transceiver with USB audio + VOX/USB CAT PTT control, such as MCHF or ICOM What you can do with this app: Voice communication: Send and receive Codec2 voice over FreeDV modes Send and receive Codec2/OPUS voice over KISS Send and receive Codec2/OPUS voice encapsulated into APRS UI frames Data communication Use APRS over FSK 300 (HF, TX only), AFSK1200 (VHF), FreeDV OFDM (HF) or APRS-IS (Internet) Send and receive APRS position reports Send and receive APRS messages APRS log with raw APRS data APRS station hub with stations grouped by callsign and their log APRS map with ability to see station info, station track with information about each geo position Use application as APRS digirepeater Use application as APRS-IS RX/TX iGate to forward packets to/from APRS-IS (Internet) Use application as APRS-IS internet tracker to send/receive APRS data over Internet Send and receive text packets in lora-aprs format over KISS Integrate with hardware/software Use it with your KISS Bluetooth/BLE/USB/TCPIP hardware modem, such as LoRa/FSK/AFSK/etc, control its parameters by using "set hardware" KISS command Use it with KISS software modem using TCPIP, such as Direwolf Use it with your HF/VHF/UHF transceiver as a sound modem Use your phone as a software sound modem by using external USB OTG audio adapter (voice + data) or built-in phone speaker and mic (only data) Use your phone for FreeDV protocol voice communication together with HF transceiver, which supports USB OTG audio Control your external transceiver PTT by using USB serial CAT (or VOX if CAT PTT is not supported) Requirements Minimum supported version is Android 6.0 (API 23), target is Android 15.0 (API 35) Application could also be used with your Android network radio, such as Inrico TM-7, apk just needs to be installed over USB, see Discussion Modem, radio module or transceiver which supports KISS protocol or can process KISS or raw Codec2 audio frames over serial Bluetooth, BLE, USB or TCP/IP Analog transceiver with built-in or external USB audio adapter and VOX or USB CAT PTT control (such as MCHF, FT817 or ICOM IC-7X00 series)