Good app but I found it lacking. The tricks were too limited in scope. I would like to see how to quickly multiply by 11, 4, 25, 15, etc how to quickly square any number I would prefer a key Pad for the answers over a range of options as I can guess in the right range rather than truly test myself. The random questions are far too limited and a greater range would be nice. I once got the SMS question 3 times in a row. I dont need to practice for that I just remembered the answer. I really liked how when one went to the lesson section it gave information with that question as the example. Thats a very neat touch.