This app is very good at helping to solve the cryptograms in the newspaper - lets you quickly try many different possible solutions and was so surprised how quickly it enabled me to solve them. Great tool if this is what youre trying to do.
So far, the built in puzzles have been pretty easy to solve. Wish there were some tougher puzzles, but maybe Ive just not come across them yet.
Has not crashed on me yet after several days of use.
ReallyDeepYogurt about CryptoQuiz, v2.0.1