Train Your Brain! app for iPhone and iPad

Train Your Brain helps you learn how to develop reasoning skills across a diverse range of inferential and deductive skills. The techniques used to answer the questions are explained clearly and concisely with over 950 practice questions graded from beginner to advanced levels.
All current research agrees that an active mind is a healthy mind and that a combination of physical and mental exercises can delay or possibly prevent the onset of mental health issues such as dementias and alzheimer’s disease.
However, with mental exercises it is often the case that an individual is one-dimensional in their choice of activity, i.e. sudoku, crossword puzzles, word searches, etc. Although this does help to maintain brain activity in one area, often it leads to neglect in others and therefore, in the case of dementias, may lead to the loss of functioning in under-used areas.