One*of the best calculators on iPhone which supported*both normal and scientific mode calculations. And it is a classic game too. Relax after work with maths But don't play during lesson 
Game Mode: (Press Robot icon to start)
Aim: Clear all the incoming number monsters. (Press '.' to change number and '=' to fire)
2 game modes available: normal and special, special mode will be unlocked after normal mode finishes.
UFO 'n' appears when sum of monsters cleared is a multiple of 10. Fire 'n' in a row to get more rewards.
New boss monsters appear in special mode. I played upto 56 levels now.
Boss level is 19, 39 so far. (? appeared in 19, which can be cleared by hit it with all numbers, some will match, _ appeared in 39 and can only be hit when it appeared as a number, bomb appeared after 20 and can clear all numbers, hit it by n)
Enjoy!
App is on Launch Celebration promotion 70% Off now
http://itunes.apple.com/app/id584599842
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Some screen caps:
Game Mode: (Press Robot icon to start)
Aim: Clear all the incoming number monsters. (Press '.' to change number and '=' to fire)
2 game modes available: normal and special, special mode will be unlocked after normal mode finishes.
UFO 'n' appears when sum of monsters cleared is a multiple of 10. Fire 'n' in a row to get more rewards.
New boss monsters appear in special mode. I played upto 56 levels now.
Boss level is 19, 39 so far. (? appeared in 19, which can be cleared by hit it with all numbers, some will match, _ appeared in 39 and can only be hit when it appeared as a number, bomb appeared after 20 and can clear all numbers, hit it by n)
Enjoy!
App is on Launch Celebration promotion 70% Off now
http://itunes.apple.com/app/id584599842
----------
Some screen caps: