Kalkudo 1.0.0

the author of this app says:

Kalkudo is a game of cross-calculations.
Kalkudo is a grid of 16 operations, 8 horizontal and vertical, comprising division, multiplication, addition and subtraction to be completed either with the numbers 1 to 9, or with the signs ( : x + - ), or with both at the same time in order to find the total of each horizontal (8) and vertical (8) operation.

There are 6 levels of the game each missing the following:
Level 1: A single number
Level 2: One or two numbers
Level 3: Two numbers
Level 4: Two or more numbers
Level 5: All the signs
Level 6: Number(s) and sign(s)

Requirements

Requires iOS 3.2 or later