MineSweeper Royale

Free for a limited time!  Clear a minefield without detonating a mine.  Tap to reveal each square. If a square containing a mine is revealed, you lose the game. If the square does not contain a mine, a digit is instead displayed in the square, showing how many adjacent squares contain mines.  You can then use this information to deduce the contents of the other squares.
You can also flag squares as containing mines. 

You have five difficulty levels to choose from, but there are a lot more levels because the game randomly and intelligently creates multiple levels within each difficulty level.