great job, walker. thanks. I am sorry I did not reply to your questions. It would be nice to have the sort and guess option for the "books" section as well, but for now, current updates will do. It would be easy to re-solve the problems (incorrect/guessed/time consuming) right there from the app, rather than e-mailing and sorting in Excel.
And it probably is out of the scope of this application, but may be, just may be, these problematic problems can be given a "second-chance" to isolate any pattern that the user may have, meaning we would be able to compare the results from the first-try and from the second-try. I am imagining a screen like this:
Q Try 1 Try 2
1 A B
2 A A
Also, may be someone (I will try) can create a web-service that will hook-up (from the app itself) these results and provide analytics, at least for OGs, on those results using tracking tools.
I have noticed one problem in the books section: while the timer is on, if I, by mistake, tap on the numbers on the right-hand side, the app will take me to that tapped number, but will not allow me (using up-down swipes) to go back to the question that I was solving. So I have to stop the timer, get out of the section, and re-start the timer at my original question.