SOTAMĀT SOTA / POTA Spotting 17+

Self-Spot off-grid via HF

Brian Mathews

Designed for iPad

    • 5.0 • 8 Ratings
    • Free



SOTAMĀT (pronounced "sota-mate") is for licensed amateur radio operators (ham radio) who want to self-spot from remote areas where there is no cellular service, no internet, and who don't have access to a satellite communicator. If you enjoy Summits-On-The-Air (SOTA) or Parks-On-The-Air (POTA) this app is for you!

What you can do "offline":
• Post a Self-Spot (SOTA or POTA) via HF radio (no internet, cellular, or satellite required!)
• Post a Self-Alert (SOTA) via HF radio (useful for CW operators to 'tickle' RBNhole)
• Select and send predefined SMS messages to predefined recipients via HF radio
• See a reference of cloud services and SOTAMĀT 2-way commands
• See a reference of frequencies by mode

The app works by encoding your commands into a special message which is modulated using your iPhone or iPad for transmission over HF (using a built-in FT8 encoder, or use PSK31 or RTTY). Worldwide monitoring stations (skimmers) pick up your HF transmission and relay it to PSK Reporter, which forwards the message to the SOTAMĀT server for processing. SOTAMĀT then connects to the official SOTA or POTA or SMS services to carry out your instructions.

The amazing thing is that you don't need a computer (use your iPhone/iPad!) and you don't need special cables (use your phone's speaker directly into your HF radio's microphone input). The app not only computes the FT8 message, but also generates the FT8 audio.

The app also has a reference table of additional commands you can use when you are "online" (via SMS, eMail, or satellite):
• Post a Spot (SOTA/POTA)
• Post an Alert (SOTA)
• Get current spots (SOTA/POTA)
• Get information (callinfo, peak info, park info)
• ...and more!

See the web site for details.

What’s New

Version 1.2.0

New version of SOTAmat: 1.2.0(build 65):
1) GPS Assisted SOTA Summit and POTA Park database search and select based on distance
2) GPS Assisted SOTA Summit and POTA Park bearing and altitude view
3) Experimental: MAX-3B transceiver support - directly get/set frequency and transmit FT8
4) UI changes: more efficient information layout, better responsiveness to non-default font sizes
5) New Time-Sync button: use WWV or listen to other FT8 stations and click to sync.
6) Updated Setup tab instructions
7) Updated Frequencies reference: now includes atomic-clock radio frequencies (WWV, etc.)
8) Updated the Services reference to include new features with SOTA Alerts (now|+[hours]).
9) Orientation lines in the map display
10) Search on Summit/Park IDs, recent SOTA activation Callsign
11) Highlight Summits/Parks in the Db that are in the current configuration. Only allow selecting valid Summits/Parks.
12) Fix: Imperial/Metric persistence
13) Fix: Loading changed Summits/Parks data from server

Note: the app only uses GPS Location data locally on-device, only while the app is running, and only on request. It is never transmitted.

Ratings and Reviews

5.0 out of 5
8 Ratings

8 Ratings

Shufei ,

Astounding Perfection

This app is everything that ham radio software should be. If you’re not using SOTAMĀT for SOTA & POTA, you’re wrong. AB6D has leveraged FT8 skimmers, Garmin satcom, an elegant web server, and a concise and clean client. Between this and APRS, why activate any other way? Bravo. Please keep this going.

App Privacy

The developer, Brian Mathews, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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