SimpleSSTV

SimpleSSTV

Encode and decode SSTV signals

2 ratings
5 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 7, 2026
  • July 15, 2026

Features

SimpleSSTV screenshot #1 for iPhone
SimpleSSTV screenshot #2 for iPhone
SimpleSSTV screenshot #3 for iPhone
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About

This app allows ham radio operators to encode images into audio signals for transmission and decode received audio back into images. It supports various SSTV modes, live camera feeds, and even AI-generated QSL cards. Receive alerts for International Space Station SSTV events.

Encode images to SSTV audio
Decode SSTV audio to images
Live camera feed with trigger modes
Support for 14 SSTV modes
AI-generated QSL calling cards
ISS SSTV event notifications
Audio setup and troubleshooting tips
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What's New in SimpleSSTV

1.3.1

July 15, 2026

Hellscriber preambles! Send your callsign as a hellscriber-encoded blast of audio before the SSTV transmission starts!

1

In-App Purchases

$1.99

Listening Station Mode

Allows continuous monitoring, saving to a chosen folder

User reviews

I really tried to use it

Today I tried two different SSTV apps on my iPhone 13. One was SimpleSSTV. I truly tried to give it an honest trial. In fact, since I never did see and instructions, I can’t be positive that I was using it correctly.
I went to the basement for quietude. I turned up the speaker on my computer and played numerous different YouTube recordings of SSTV sounds.
I pressed the button to start listening.
I tried to select the correct encoding method.
And I ended up with 16 six second captures for one played sound file. Sometimes a window would appear saying that not nearly enough of some units were captured and decode had failed.
Once, out of ten or so sound files from various sources I was able to force the recording of the sound file and decode it afterwards, but never could I decode it while playing.
I’d be happy to try again if I receive some kind of instructions.
I deleted the app, but I’m willing to redownload it.
Jeroen, the developer, provided a very helpful response. To him I say, yes, I absolutely would be willing to try again in a month.
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Response from developer

Thanks for leaving a review even though you clearly had a frustrating time decoding images. Acoustic coupling (playing audio into a phone mic) isn't ideal: Apples noise canceling for phone calls is top notch but it messes with data transfer sometimes, and room acoustics create aliasing errors. That said A) I am aware of deeper issues with the decoder that make it perform badly, which I will hopefully fix soon in the V1.1 release and B) your concerns lead me to design a FAQ section with getting started tips, so thanks for that. Maybe give it another shot in a month when the fix lands. And a 4$ usb audio adaptor helps a LOT.

Very well made

Very mell made app. Not the best decoding software for poor quality audio but really good and well simple for decent quality

Response from developer

Thanks for taking the time to leave a review. The effectiveness of the decoder on source material with noise or fading isn't great, it loses sync too easily. I'm aware of this, and hope to improve it in new releases. Stay tuned!

Pretty great!

While this is a bit rudimentary, it’s very great for a free app! I’d personally love to see other modes added such as BW/8 or some others, but with that aside I’m fine for what this is.

Response from developer

That's very good feedback, thanks. I'll do some research on other existing modes and add them in a future release. Getting the decoder user experience just right is... well, a journey, so if you have feedback on how that's working for you let me know! And stay tuned for the 0.9 release that's going live next week, it should fix some crashes and add a FAQ section in the settings menu for improving rx and tx quality.

Not working

When I try decoding an image it never shows the image and says no decodes in the library

Response from developer

Thanks for the feedback, acoustic coupling (holding an iPhone mic up to a radio) is notoriously finicky. A cheap 5$ usb audio dongle to connect your device to your radio with a jack cable will probably do wonders for the rx quality

It doesn’t work! 它没用!

First,I'm from china. I listened a SSTV in this App.but I can’t see the picture.so WHY?这玩意根本没用!

Response from developer

Thanks a lot for trying out the app, and thank you for taking the time to write a review. They help me figure out what works and what doesn't for other people! The 0.4 version had a bug in the audio interface for phone versions other than the devices I had for testing. Upgrading to the new version, especially 0.7, should help increase decode quality and alleviate crashes. Good luck decoding images :) If it keeps crashing, don't hesitate to write another review, or reach out to me via the support page. I will see if there is anything I can do to fix your issue.

Developer apps

FAQ

What is SimpleSSTV?

SimpleSSTV is a utility app designed for encoding and decoding Slow-Scan Television (SSTV) signals, a method used by ham radio operators to transmit images over audio frequencies. It supports various SSTV modes and features like live camera transmission and AI-generated QSL cards.

How does SimpleSSTV work?

The app converts images into audio tones that can be transmitted over radio. Conversely, it can decode received SSTV audio signals back into images. It offers features for both encoding images to audio and decoding audio to images, with support for numerous SSTV modes.

Can SimpleSSTV be used for live camera transmission?

Yes, SimpleSSTV includes a live camera mode that allows for real-time transmission. You can choose between continuous, motion-triggered, or periodic interval trigger modes for your camera feed.

Does SimpleSSTV notify users about ISS SSTV events?

Yes, SimpleSSTV provides notifications for when the International Space Station transmits SSTV images. You will receive automatic alerts before and during these events, including frequency, mode, and callsign information.

What SSTV modes does SimpleSSTV support?

SimpleSSTV supports a total of 14 SSTV modes, including popular ones like Martin M1 and M2, Scottie S1, S2, and DX, and various Robot and PD modes. A quick reference for all supported modes is available within the app.

Does SimpleSSTV have ads?

No, SimpleSSTV does not contain advertisements. It is a free application that offers its full functionality without interruption from ads.

What devices is SimpleSSTV compatible with?

SimpleSSTV is available for Mac, iPhone, and iPad devices. It is designed to work across the Apple ecosystem.

Where can I find help with audio setup for SimpleSSTV?

The app includes a dedicated help section in its settings that provides practical advice on audio setup, recommendations for USB adapters, and troubleshooting tips for decoding issues. This section is designed to help users achieve clean audio signals.