Sudoku Quest currently comes with 4 amazing power-ups.
Power-ups that can be purchased using Gems:
1) Hint - Solves one random empty cell with the correct number. Use 'Hint' to get one cell solved whenever you are stuck in a puzzle.
2) Magic Lamp - Solves one cell for every region(block). 'Magic Lamp' is extremely helpful for difficult puzzles, use it whenever you find it difficult to move ahead in a puzzle.
Power-ups that can be purchased using Coins:
1) Magic Eye - Lets you highlight a selected number on the board which helps you concentrate better. Use 'Magic Eye' if you find it difficult to locate occurrences of any digit on the board.
2) Quick Pick - Helps you by finding the easiest cell to solve on the board. Fast track your puzzle solving experience by finding the easiest cell to solve using 'Quick Pick'
Coins are earned by completing puzzles while Gems are earned by logging on to Facebook, inviting friends and on completing certain milestones in the game.
Additional coins and gems can always be bought from the Sudoku Quest store.
Good Luck!