APRS Tracker Digi iGate vs SSTV+

Stay visible. Stay connected. This app is a tool for radio amateurs, civil defense volunteer teams, and operators using the APRS protocol in field activities. The app allows you to transmit your position to the APRS-IS network via the internet and also operate directly via radio using AX.25 packets with 1200 AFSK modulation. It can be used for individual tracking, local communication, and supporting the infrastructure of an APRS network. Whether in expeditions, amateur radio events, travel in remote areas, or search and humanitarian aid operations, APRS Tracker provides features to track stations, share points of interest, and expand APRS coverage. KEY FEATURES APRS-IS Tracking Send your GPS coordinates to APRS-IS servers via the device's internet connection. Positions can be tracked on compatible public services, such as aprs.fi. AX.25 / 1200 AFSK RF Mode Transmit and receive APRS packets through the device's audio input and output. With a radio and a compatible audio interface, you can operate via RF even without internet access. APRS Digipeater Use the app as a digital repeater to extend the range of stations in the area. The Digipeater processes paths compatible with New-N rules and includes controls against loops, invalid paths, and duplicate packets. iGate Mode Forward valid packets received via radio to APRS-IS, allowing local stations to be viewed on the worldwide APRS network. Optional internet-to-RF forwarding features packet type selection, radius definition, security filters, and frequency limits. APRS Objects Register important points, such as shelters, support bases, aid posts, repeaters, obstacles, risk areas, or meeting places. Each object can contain a name, coordinates, symbol, and message, with publication via internet and/or RF. Mobile or Fixed Station Use dynamic location while on the move or configure fixed coordinates to operate as a base, iGate, Digipeater, or support station. Symbols and Status Messages Choose the APRS symbol representing your station, vehicle, or activity, and add a message to inform your condition or mission. Communication Monitoring Track sent and received packets in the integrated terminal, along with the status of the APRS-IS connection and RF operation. Automatic Reconnection After temporary internet interruptions, the app attempts to re-establish the connection with the APRS-IS server. USE CASES Tracking during trips, expeditions, and outdoor activities. Monitoring of vehicles and volunteer teams in the field. Support for search, rescue, civil defense, and humanitarian aid operations. Local APRS radio operation in areas without internet. Temporary installation of an iGate or Digipeater to expand coverage. Publishing shelters, bases, risks, and support points as APRS Objects. Technical monitoring of AX.25 packets and APRS-IS communication. SIMPLE AND CONFIGURABLE Enter your amateur radio callsign, Passcode, server, and transmission preferences to begin. RF, Digipeater, and iGate features are disabled by default and only work when enabled by the user. IMPORTANT REQUIREMENTS Access to APRS-IS requires an amateur radio callsign and a valid Passcode. RF operation requires a radio and a compatible audio interface. Performance depends on equipment, audio levels, VOX/PTT configuration, and channel conditions. Continuous use of GPS, audio, and background execution may increase battery consumption.

SSTV+ is a Slow Scan Television audio encoder and decoder designed for amateur radio enthusiasts. Use your iPhone’s microphone to listen for SSTV audio signals. SSTV+ automatically detects the VIS mode and progressively reconstructs the image entirely on your device. You can also select a photo from your library, encode it as standard SSTV audio, play it through the device speaker, or export it as a WAV file. Key Features: • Receive and decode SSTV audio signals in real time • Automatically detect VIS modes • Encode photos as SSTV audio • Scale, fill, crop, and reposition images • Support Robot 36 and Robot 72 • Support Martin M1 and Martin M2 • Support Scottie S1 and Scottie S2 • Support PD 90, PD 120, and PD 180 • Keep a local history of received and transmitted images • Optionally retain original received audio • Export and share WAV audio files • Save decoded images to your Photos library Completely Offline: SSTV+ requires no account or sign-in and does not connect to any servers. Signal detection, image decoding, and audio generation are performed entirely on your device. The app contains no advertising, user tracking, analytics SDKs, or cloud synchronization. Your photos, audio, and history remain stored locally on your device. Nothing is uploaded to the developer or shared with third parties. All core features remain available without an internet connection. Permissions: • Microphone: Used only to receive and decode nearby SSTV audio signals • Photos: Used only when you choose a photo for encoding or save a decoded image SSTV+ only processes and plays audio. It does not directly transmit radio-frequency signals. When using the app with external radio equipment, please follow the amateur radio regulations applicable in your country or region.