Puzzle Page for iPhone
In the past few years, we have covered plenty of cool crossword puzzle and Sudoku apps here. Puzzle Page for iPhone is also worth a look. It is a cool app that brings you word, math, logic, and picture puzzles to try on a daily basis. Detailed instructions are also available just in case you are stuck.
This app has a calendar that lets you easily go through puzzles from previous days. It comes with 20+ varieties of puzzles for you to choose from. To get the most out of this app, you will need to subscribe.