There are a couple discrepancies with the questions, a lot of typos and poor grammar, and repeated questions amongst the different quizzes. However, the most frustrating part of this app is that it will freeze up and lag from the immense number of flashing banner ads and will render itself to a 30 second delay in actions or need force closed and the quiz you were on will have to be restarted. This is pretty sad for a very basic app that nearly any low-level developer could’ve created. The whole thing felt rushed and has probably never seen an update since it’s release, yet is still producing ad revenue and should be properly maintained while the developer still profits off it.