Spreadsheet for Apple Watch.
99 rows, 5 columns.
Automatic saving of each cell.
Graph the data of each column with one click (button above the column).
Basic cell operations: + - * / ^
Constants: π (=pi), e (=eu).
Functions: sin(x), cos(x), tan(x), log(x), ln(x),
Sum: sum(x:y),
Arithmetic mean: ave(x:y),
Maximum value: max(x:y),
Minimum value: min(x:y),
Random number from 0 to 1: rnd(),
Round to integer: rou(x).

Sample formulas:
=(-27)^(1/3)
=log(pi)^sin(eu)
=ave(b1:b12)
"Roll the dice":
=rou(rnd()*5+1)

Variable button under the column:
- The "trash" deletes data in the entire column (except for previously selected cells with a formula entered, when they display =... instead of the formula result)
- If the column is empty, the button (white arrow) fills it with numbers corresponding to the row numbers (1,2,3 ... 99)
- If the column is empty, when you enter a formula in row 99, the button (blue arrow) fills the entire column with that formula (if the formula references a cell in row 99, e.g. a99, the copied formula will adjust to the corresponding row, so row 98 will reference a98 ... row 1 will reference a1)

Example function graph (x^3):
1. Under column A, press the button (white arrow)
2. In cell B99, enter the formula =(a99-50)^3 
3. Under column B, press the button (blue arrow)
4. Above column B, press the button (chart)