Who is the hidden dev behind this? – ScrivoPro Scrivener Compatible Review

Knowtilus, Kairoos, Studio5apps? These three have their hands in these apps: Textilus, Scrivio, and NotesWriter Pro. These three apps have very little to differentiate them from each other. They all look the same. Where is a feature comparison chart? Where do you go to get support? I see reviews for all three that mention a decided lack of response when contacting "support."
Review by Scruffy_Dog on ScrivoPro Scrivener Compatible.