What is Reddit's opinion of PixelKnot: Hidden Messages?

From 3.5 billion Reddit comments

i learned about this in class only theoretical learning no actual practical work. Pixelknot is a great app to send secret messages to others via a picture it may not be a file but i think its still great if you're into that kind of stuff.

This is done by steganography and you can for example use this app for android to do something like that. Storing your seed encrypted in an image: https://play.google.com/store/apps/details?id=info.guardianproject.pixelknot

Android install.. https://play.google.com/store/apps/details?id=info.guardianproject.pixelknot

Maybe it's hidden using something like pixelknot? https://play.google.com/store/apps/details?id=info.guardianproject.pixelknot

Look into Steganography