FWIW, early adopter here and I love the app. The only thing that makes me turn it off occasionally is the false positives from when I'm just touching my face.
If you could fix that, you're golden!
Would you please try it with new version?
This is one of those things where we will keep getting closer to 100% as we improve... working hard everyday to improve it!
I can't get to the gesture tutorial though, perhaps because of the upgrade from the first version to the App Store version?
P.S. Are you planning to add a thumbs up gesture to favorite a song? ;)