Numberama is the good old puzzle and probably the best time killer, that was popular in USSR universities at the 80's and 90's.
The objective is to cross out neighbouring (vertically or continiously) pairs of digits to completely empty the screen. You can cross out the same numbers or the ones that give a total of 10.
Features:
• Classic game with numbers from 1 to 19
• Random game for advanced players
• Fullscreen mode. Just you and the game
• Up to 20 undo steps, don't worry about mistakes
• Time, lines and pairs statistics for your service
• Different high scores for Classic and Random games
• Easy to play. Easy to share
Link to App Store - http://itunes.apple.com/us/app/numberama/id467901633
Video with gameplay - http://youtu.be/2mUhg6N_x9E?hd=1