Spreadly

Spreadly for your iPad lets you design spreadsheets and plan, organize, or analyze just about anything.
Add lables, numbers and functions to any cells. Perform functions on any cells. And have as many spreadsheets as you want.
Easily draw a Pie chart of the values as well.
Currently includes the following functions:
SUM Sum a range of cells
AVG Average of a range of cells
DAT Put date
MIN The minimum value in a range of cells
MAX The maximum value in a range of cells
ABS Absolute value
CEIL Rounds a number to the nearest integer
FLOOR Rounds a number down, toward zero
COS Cosine
SIN Sine
TAN Tangent
RAD Convert degrees to radians
DEG Convert radians to degrees
PI Pi or Π
ACOS Arccosine
ASIN arcsine
ATAN arctangent
EVEN Rounds number up to the nearest even number
ODD Rounds number up to the nearest odd number
INT Rounds number up to the nearest integer
LN Returns the natural logarithm of a number
LOG Returns the logarithm of a number to a specified base
LOG10 Returns the base-10 logarithm of a number