The first release features over 50 functions and the ability to email spreadsheets created on the iPhone to Mac or PC for further editing. The function list includes:
Date/time functions -- DATE, DATEADD, DAY, DAYABBREV, DAYNAME, HOUR, LASTDAY, MINUTE, MONTH, MONTHABBREV, MONTHNAME, NOW, SECOND, TIME, TODAY, YEAR
General functions -- COL, COUNT, ROW
Math function -- ABS, CEILING, EVEN, EXP, FACTORIAL, FLOOR, LOG, LOG10, MAX, MIN, ODD, POWER, ROUND, SQRT, SUM
Statistical functions -- AVE, MEDIAN, MODE
String functions -- CONCATENATE, LEFT, LOWER, MID, RIGHT, UPPER
Trignometry functions -- ACOS, ASIN, ATAN, COS, COSH, PI, SIN, SINH, TAN, TANH
The initial App Store reviews of Spreadsheet aren't exactly glowing, which is why TUAW will be doing a detailed review in the near future.