Thank you for this post. This app addresses something I've complained about for a long time...
Any sight-reading applications (and I mean ANY) that does not precisely play-back the offered material to the student is sub-standard.
We all make massive assumptions when it comes to musicianship, but I think those assumptions are magnified when it comes to sight-reading.
We offer material to play, but we also assume the student is proficient enough to bypass confirmation playback. I am not saying it should be mandatory, but it MUST be an option. If someone is a beginner and is trying to hone their sight-reading skills, if they do not receive confirmation that what they've just played is accurate then the application could be reinforcing bad habits and misunderstandings. Sure, if you've played for years and have music down cold, you can just turn off any answers or confirmation. If an application does not offer such an option, I would warn off beginners and those uncomfortable with sight-reading. When a teacher is in the room, the student gets immediate feedback on any shortcomings. This web site sees this obvious need and fills it.
Again, thank you for this link.