Robot36 - SSTV Image Decoder

1.51K reviews
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About this app

Following modes are supported:

Robot Modes: 36 & 72
PD Modes: 50, 90, 120, 160, 180, 240 & 290
Martin Modes: 1 & 2
Scottie Modes: 1, 2 & DX
Wraase Mode: SC2 180

Old B/W or unsupported modes can be viewed in "Raw Mode".

If an calibration header gets detected, the resulting image will be saved in the "Pictures" directory and can be immediately seen in the Image gallery.

Switching away to another application will not stop the decoder and it will continue to run in background.
To stop the decoder, you can either press pause or exit via the "back" button of Android.

Here you can find my wife's free open source SSTV Encoder:
Updated on
Nov 19, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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1.51K reviews
A Google user
September 15, 2019
I don't know what this is. But it seems really cool. I always have trouble understanding anything in terms of waves. What exactly is going on here? Like the converse of sonar? Like a light into Sound kinda thing? Can you use it to hide audio? Not that sonar makes light. You know what I mean. Actually sonar doesn't convert it just reflects right? Bad example. The opposite of a spectrograph? Audio representation of visual data kind of thing?
20 people found this review helpful
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Ahmet Inan
August 28, 2019
Thank you for asking. :) This tool is used to decode the audio resulting from Slow-scan television (SSTV) encoded images. It is a very similar technology to what is used in an ordinary telly, but about a thousand times slower. Where TV decodes every couple of milliseconds a frame, SSTV needs a couple of seconds to decode a complete image.
A Google user
December 28, 2019
I love this app, but I've had a slight problem this last time I've installed it... For some reason the save button is greyed out, and the share button doesn't seem to do anything. Is there any reason this would be happening that I'm just missing? I had to save my last image via screenshot, which isn't ideal, so I'd rather be able to use the default save feature :) I'm on Android 10 on a Nokia 7.1 Thanks for the great app!
37 people found this review helpful
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Ahmet Inan
December 29, 2019
Thank you for feedback! You might want to try to purge the cache, as it helped a lot of Android 9 and 10 users. Otherwise please send me a screenshot of the buttons and menu entries per email.
Rhett Robinson
July 11, 2021
I just lost a nearly perfectly decoded image because I accidentally hit the delete button instead of the save button.Needs a confirm dialog. Catastrophic data loss. Also, "Auto mode" isn't clear... tapping menu button seems to do nothing. Is it active? Show a checkbox? Could be improved a good bit, but not bad for a free app.
28 people found this review helpful
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What's new

updated libraries