Coincidently, I was investigating Sketch last week. I ran into the same issue. I ended up using "Sketch App" in my queries with mixed results. Similar to your s

Coincidently, I was investigating Sketch last week. I ran into the same issue. I ended up using "Sketch App" in my queries with mixed results. Similar to your suggestion, I also tried tacking on "Bohemian" -- as in Bohemian Coding -- the app's developers.